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SYSTEM IN MECHANICAL ENGINEERING(SME) | diplomachakhazana

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 MCQ

Systems in Mechanical Engineering (102003) 2019 Pattern

Unit I: Introduction of energy sources & its conversion




Hydroelectric Power Plant

1

The amount of electric energy generated by a Hydroelectric Power Plant is depends upon_

a) Efficiency of alternator

b) Quantity of water

c) Specific weight of water

d) All of the above 


2

Hydroelectric Power Plant mainly located in

a) Flat areas

b) Deserts

c) Hilly areas

d) Deltas


3

In Hydroelectric Power Plants, Trash racks are used to_

a) Discharge the water freely from turbine exit to tailrace.

b) Prevent turbine from ingress of floating and other materials.

c) Create artificial head to store potential energy of water.

d) Control the opening of valve.


4

Turbines are used in Hydroelectric Power Plant is to convert_

a) Mechanical energy into Electric energy

b) Potential energy into electric energy

c) Kinetic energy into Electric energy

d) Electric energy into Mechanical energy.


5

In Hydroelectric Power Plant inlet valve is used to regulate_

a) Water flow to Turbine.

b) Water flow to Reservoir

c) Water flow to Tailstock

d) Water flow to Generator.


6

Function of Dam in Hydroelectric Power Plant is to_

a) Develops reservoir to store water & builds up head

b) Regulate water flow

c) Convert mechanical energy into Electric energy

d) Support the Penstock.



7

Which of the following is not an advantage of Hydroelectric Power Plant

a) It is a renewable energy source

b) Low running cost

c) Continuous power supply

d) No Losses.


8

Hydroelectric power plant is generally located near load centre.

a) True

b) False


9

Hydroelectric Power Plant generates more efficiency than Nuclear power plant.

a) True

b) False


10

In Hydroelectric Power Plant, water is discharged from turbine through_

a) Penstock

b) Tail race

c) Condenser

d) Reservoir


11

Which statement about Hydroelectric Power Plant is wrong?

a) Construction cost is high

b) No smoke & ash Produced

c) Rapidly change in load demand is not possible.

d) Nature dependent source of energy.


12

Which of the following component is not a part of Hydroelectric Power Plant?

a) Penstock

b) Trash Rack

c) Condenser

d) Dam


13

In Hydroelectric Power Plant, 

a) Operating cost is high & Initial cost is high

b) Operating cost is low & Initial cost is high

c) Operating cost is low & Initial cost is low

d) Operating cost is high & Initial cost is low


14

Energy conversion flow in Hydroelectric Power Plant is_

a) Potential – Kinetic- Mechanical –Electrical

b) Kinetic – Potential – Mechanical – Electrical

c) Potential – Kinetic – Electrical – Mechanical

d) Kinetic – Potential – Electrical – Mechanical


15

Which of the following is not a requirement for site selection of hydroelectric power plant? 

a) Availability of water 

b) Large catchment area 

c) Rocky land 

d) Sedimentation


16

Which statement about hydroelectric power plant is wrong? 

a) Efficiency of hydroelectric power plant does not reduce with age 

b) Its construction coast is very high and takes a long time for erection. 

c) It is very neat and clean plant because no smoke or ash is produced. 

d) Meeting rapidly changing load demands is not possible in hydroelectric power plant.


17

Which of the following is not an advantage of hydroelectric power plant? 

a) No fuel requirement 

b) Low running cost

 c) Continuous power source 

d) No standby losses 


18

Which of the following statement is true about hydroelectric power plant? 

a) Hydroelectric power plants are multipurpose. 

b) Due to non-uniform flow of water frequency control in such plants is very difficult. 

c) Hydroelectric power plant has high running cost 

d) Water is used as fuel in hydroelectric power plant 


19

Which element of hydroelectric power plant prevents the penstock from water hammer phenomenon? 

a) Valves and Gates 

b) Draft tubes 

c) Spillway 

d) Surge Tank


20

Spillway discharges the overflow water to the downstream side when the reservoir is full. 

a) True 

b) False 


21

Trash racks are built for 

a) discharging the water freely from the turbine exit to tailrace 

b) preventing the turbine from ingress of floating and other materials 

c) creating artificial head to store sufficient potential energy of water 

d) controlling the opening of valves 


22

Penstock in a hydroelectric power plant is 

a) a pipe connected to runner outlet 

b) nozzle that release high pressure water on turbine blades 

c) a conduit connecting forebay to scroll case of turbine 

d) a pipe connecting surge tank to dam 


23

The pressure at the inlet or exit of the draft tube should not be 

a) less than one third of atmospheric pressure 

b) greater than one third of atmospheric pressure 

c) less than one atmospheric pressure 

d) greater than one atmospheric pressure 


24

Draft tube increases the operating head on the turbine. 

a) True 

b) False 


25

Which statement about surge tank is wrong? 

a) Ideal location of surge tank is at the turbine inlet 

b) A decrease in load demands cause a rise in water level in surge tank 

c) Surge tanks are totally closed to avoid entry of unwanted objects to penstock 

d) Surge tanks are installed to reduce harm effects of water hammer phenomenon


 26

Trash racks are located 

a) near tailrace 

b) at the entrance of turbine 

c) inside penstock 

d) intake


27

The cheapest plant in operation and maintenance is....... 

A. Steam power plant 

B. Nuclear power plant 

C. Hydro-electric power plant 

D. None of the above 


28

The axis of Pelton turbines are mostly........ 

A. Horizontal 

B. Vertical 

C. Inclined 

D. None of the above 


29

The power output from a hydro-electric power plant depends on three parameters........ 

A. Head,type and dam of discharge 

B. Head, discharge and efficiency of the system 

C. Efficiency of the system, type of draft tube and type of turbine used 

D. Type of dam, discharge and type of catchment area 


30

In a hydro plant, if the discharge is 200 m3/s and the head of the water is 100 m. If the efficiency of the 

turbine alternator is set to 0.85, find the power developed 

a. 66.67 MW 

b. 166.7 MW 

c. 667.8 MW 

d. 176.52 MW 


31

The hydroelectric power plants are__________. 

a. Operating cost is high and initial cost is high 

b. Operating cost is low and initial cost is high 

c. Operating cost is low and initial cost is low 

d. Operating cost is high and initial cost is low 

Nuclear power plant


32

The process by which a heavy nucleus is splitted into two light nuclei is known as

(a) splitting

(b) fission

(c) fusion

(d) disintegration

NUCLEAR POWER PLANT

33

Which parts function is to reduce the energy of fast neutrons to thermal neutrons in nuclear power

plant?

A) Moderator 

B) Coolant circulator

C) Control rods

D) Shielding


34

Which nuclear fuel is usually used in thermal nuclear reactor to create fission?

a) U234

b) U235

c) U236

d) U237


35

Control rods are made of

a. Cesium

b. Cadmium

c. Tin

d. Gallium


36

Shield is made of

e. Iron Metal enclosure

f. Concrete and water

g. Ceramics walls

h. Copper metal


37

In which plant minimum quantity of fuel is required in........

A) Thermal power plant

B) Hydro electric power plant

C) Nuclear power plant

D) Geothermal power plant


38

The function of the moderator in a nuclear is to........

A. Stop chain reaction

B. Absorb neutrons

C. Reduce the speed of neutrons

D. Reduce temperature


39

In nuclear fission what causes fission reaction

a) freely moving electron

b) number of newtrons

c) nucli

d) slowly moving newtron


40

The first nunclear power plant in India is located at

A) Kota

B) Kapakkam

C) Kerala

D) Tarapur


41

Which of the following is the advantage of nuclear power plant

A. Initiat cost is low

B. Highly skill operators are required

C. Minimum Quantity fuel required


42

The efficiency of a nuclear power plant in comparison to a conventional thermal power plant is 

(a) same 

(b) more 

(c) less 

(d) may be less or mote depending on size


43

Which element of nuclear reactor controls excess heat released

A) Moderators

B) Control rods

C) Insulation

D) Fuel rods


44

A nuclear unit becoming critical means 

(a) it is generating power to rated capacity 

(b) it is capable of generating much more than rated capacity 

(c) there is danger of nuclear spread 

(d) chain reaction that causes automatic splitting of the fuel nuclei has been established


45

Reflector in nuclear plants is used to 

(a) return the neutrons back into the core 

(b) shield the radioactivity completely 

(c) check polllution 

(d) conserve energy 


46

In nuclear fission each neutron that causes fission releases 

(a) no new neutron 

(b) at least one new neutron 

(c) one new neutron 

(d) more than one new neutrons


47

Cost of nuclear fuel in nuclear power plant economics is considered as 

a) running cost 

b) maintenance cost 

c) capital cost 

d) development cost 


48

The most commonly used moderator in nuclear plants is 

(a) Heavy water 

(b) concrete and bricks 

(c) graphite and concrete 

(d) deuterium 


49

The nuclear energy is measured as 

(a) MeV 

(b) curie 

(c) farads 


50

The efficiency of a nuclear power plant in comparison to conventional and nuclear consideration is 

(A) Higher cost of nuclear fuel 

(B) High initial cost 

(C) High heat rejection in condenser 

(D) Lower temperature and pressure conditions


51

The control rods in the control system of nuclear reactors are used to 

(A) Absorb excess neutrons 

(B) Control fuel consumption 

(C) Control temperature 

(D) All of the above


52

Which of the following is more appropriate for a moderator? One which 

(A) Does not absorb neutrons 

(B) Absorbs neutrons 

(C) Accelerates neutrons 

(D) Eats up neutrons 


53

A nuclear reactor is said to be critical when the neutron population in the reactor core is 

(A) Rapidly increasing leading to the point of explosion 

(B) Decreasing from the specified value 

(C) Reduced to zero 

(D) Constant 


54

The main interest of shielding in nuclear reactor is protection against 

(A) X-rays 

(B) Infrared rays 

(C) Neutrons and gamma rays 

(D) Electrons 


55

A fission chain reaction in uranium can be developed 

(A) By increasing the contents of U₂₃₅

(B) By slowing down fast neutrons so that U₂₃₅ fission continues by slow neutron 

(C) Both (A) and (B) 

(D) None of these 


56

The best capable alternative source which can meet the future energy demand is _____________

a. Thermal power 

plant

b. Nuclear power plant c. Hydroelectric power 

plant

d. Geothermal power 

plant


57 Operating cost of nuclear power plant is less than thermal power plant.

a) True

 b) False


58

What is used in nuclear reactor as a cooling method/device?

a) Coolant

b) Water jackets

c) Air cooler

d) Air ventsSolar Energy 

SOLAR ENERGY

59

Reflecting mirrors used for exploiting solar energy are called........ 

A. Mantle 

B. Ponds 

C. Diffusers 

D. Heliostats


60

The output of solar cell is of the order of........ 

E. 1 W 

F. 5 W 

G. 10 W 

H. 20 W 


61

Photovoltaic cell or solar cell converts........ 

I. Thermal energy into electricity 

J. Electromagnetic radiation directly into electricity 

K. Solar radiation into thermal energy 

L. Solar radiation into kinetic energy 


62

Temperature attained by a flat-plate collector is of the........ 

M. Order of about 900C 

N. Range of 1000C to 1500C 

O. Above 1500C 

P. None of the above 


63

The energy radiated by sun on a bright sunny day is approximately. 

a) 700 W/m2

b) 800 W/m2

c) 2 KW/m2

d) 1 KW/m2


64

Series and parallel combination of the solar cell is known as _________

a) Solar array

b) Solar light

c) Solar sight

d) Solar eye


65

material used for making solar cell is _________

a) Silicon

b) Carbon

c) Sodium

d) Magnesium


66

A solar collector is a device for collecting solar radiation on a surface called absorber and transfer this 

energy to another fluid.

a) True

b) false


67

Which of the following are renewable energy source?

a) Solar

b) Wind

c) Geothermal

d) All of above


68

Which of the following area is preferred for solar power plant?

a) Coastal area 

b) Hot arid zones

c) Mountain tops

d) High rainfall zones.


69

A module is a

a) Newly installed solar cell

b) Series parallel arrangement of solar cell

c) A series of solar cells when not used for power generation

d) None of the above


70

Solar thermal power plant can be achieved by

a) Using focusing collector

b) Using flat plate collector

c) Using a solar pond

d) Any of the above.


71

Solar energy is preferred because it is --------

a) Free from pollution 

b) Available in abundance

c) No fuel transportation

d) Can be converted in power

e) All of the above.


72

The function of a solar collector is to convert.......

a) Solar Energy into Electricity

b) Solar Energy radiation

c) Solar Energy thermal energy

d) Solar Energy mechanical energy

e)


73

Photovoltaic cell or solar cell converts........

a. Solar radiation directly into electricity

b. Solar radiation into thermal energy

c. Solar radiation into kinetic energy

d. All of the above


74

Solar cells for power generation entail the following major disadvantages........ 

Q. Variable power 

R. High cost 

S. Lack of availability 

T. Large area requirement Thermal Power Plant

THERMAL POWER PLANT

75

The major heat loss in a steam power station occurs in ........

A. Heat chamber

B. Penstock

C. Spillways

D. Condenser


76

. ........requires more space

A. Nuclear power plant

B. Hydro-electric power plant

C. Thermal power plant

D. Diesel power plant


77

The commercial sources of energy are

A. solar, wind and biomass

B. fossil fuels and nuclear energy

C. wood, animal wastes and agriculture waster

D. none of the above


78

Which part of thermal power plant causes maximum energy losses?

 A. Boiler

 B. Alternator

 C. Condenser

D. Ash and sunburn carbon


79

Which of the following is used to convert steam into water?

A. Pump

B. Boiler

C. Turbine

D. Condenser


80

The steam condensate is at_______

A. Entry of boiler

B. Entry of turbine

C. Exit of boiler

D. Exit of condenser


81

The generator is connected to__

A. Pump

B. Boiler

C. Turbine

D. Condenser


82

The main function of the pump is__

A. To supply the water to boiler

B. To increase pressure of water

C. Both A & BD. None of the above


83

Which of the following is not an advantage of Thermal Power plant

A. Low space required

B. Low Initial cost

C. Causes air pollution

D. Readily adjustable to loads


84

Which of the following is not a disadvantage of Thermal power plant

A. Non-renewable source of energy

B. Low efficiency of the plant

C. Causes air pollution

D. Low initial cost


85

Which of the following is not a part of Thermal power plant

A. Condenser 

B. Fuel Tank

C. Pump

D. Turbine


86

Which of the following generation station has minimum running cost?

a) Thermal power 

station 

b) Hydro-electric 

power station

c) Nuclear power 

station

d) None of these


87

The cost of fuel transportation is maximum in........

 a. Hydro-electric 

power plant

b. Steam power plant 

c. Nuclear power 

plant

 d.90% - 95%


88

Which of the following station is least efficient........

 a. Nuclear power 

plant

b. Diesel power station 

c. Thermal power 

station

 d. None of the above


89

What would be the most important factor under consideration for the site selection of a thermal 

plant?

a. Availability of fuel 

b. Availability of water

 c. Distance from the 

populated area

d. Cost and the type of 

land


90

The following is the correct order of energy conversion in thermal power plants

a. Chemical energy –

Mechanical energy –

Electrical energy

b.Mechanical energy –

Chemical energy –

Electrical energy

c.Wind energy –

Mechanical energy –

Electrical energy

d.Heat energy –

Electrical energy –

Mechanical energy


91

The function of a condenser in a thermal power plant is .......

a. To act as reservoir 

to receive steam from 

turbine

b. To condense steam 

into condensate to be 

reused again

c. To create vacuum 

d. All of the above


92

A condenser in a steam power plant is .......

a. Increases expansion 

ratio of steam

b. Reduces back 

pressure of steam

c. Reduces temperature 

of exhaust steam

d. All of above


93

 The temperature of condensate is.......on leaving the condenser than that of circulating water at inlet

a. Higher b. Lower c. Same d. All of the above94 A condenser condenses the steam coming out from___________.

a.Boiler 

b. Turbine 

c. Economiser 

d. Super heater.


96

The temperature of the condensate is

a.Higher than the 

temperature of the 

cooling water

b. Lower than the 

temperature of the 

cooling water

c. Equal to the 

temperature of the 

cooling water

d. None of above

Geothermal Power Plant

GEOTHERMAL POWER PLANT

97

The process of producing energy by utilizing heat trapped inside the earth surface is called

a) Hydro-thermal energy

b) Geo-Thermal energy

c) Solar energy

Wave energy


98

Earth’s outer layer rock is called as _

a) Mantle

b) Crust

c) Outer core

d) Asthenosphere


99

The geothermal energy is the from the earth.

a) Heat

b) Light

c) Photons

d) Protons


100

Geothermal energy is the thermal energy present

a. On the surface of the earth

b. In the interior of the earth

c. On the surface of the ocean

d. None of the above


101

The following are the visible signs of the large amount of heat is lying in the earth interior

a. Volcanoes

b. Geysers

c. Hot springs

d. All of the above


102

When the water is ejected from earth’s interior in the form of hot water it is called as

a. Geysers

b. Hot springs

c. Both a and b

d. None of the above


103

The efficiency of geothermal power plant is

a. 5%

b. 15%

c. 25%

d. 35%


104

Hydrothermal fluids are ______ in nature

a. Corrosive

b. Abrasive

c. Both a and b

d. None of the above


105

Following is true statement for geothermal energy

a. Reliable source renewable energy

b. Creates pollution

c. Requires high maintenance

d. Available everywhere


106

Transportation of geothermal energy is easy, this statement is true at false

a. True

b. False


107

The one of the disadvantages of geothermal energy is

a. Source may get depleted over the period of time

b. Unlimited source available over years

c. Source location is always convenient

d. Not depending on external source


108

Condenser function in geothermal power plant is

a. To generate mechanical energy

b. To convert steam into water

c. To generate electricity

d. None of the above


109

The function of the steam turbine is

a. To convert steam into water

b. To convert electricity into mechanical work

c. To generate mechanical work

d. None of the above


110

Largest geothermal plant in operation is in........ 

U. Maxico 

V. Italy 

W. Russia 

X. California 


111

 Which of the following is a type of high temperature geothermal resource?

a) Dry steam 

b) Dry water 

c) Wet steam

 d) Water


112

 Which of the following is used to locate a geothermal site?

a. Drilling wells 

b. Reflection

 c. Seismograph 

d. Sonar

Wind Energy


113

What type of energy is wind energy? 

a) Renewable energy 

b) Non-renewable energy 

c) Conventional energy 

d) Commercial energy 


114

What are used to turn wind energy into electrical energy? 

a) Turbine 

b) Generators 

c) Yaw motor d) Blades


 115

Wind energy can be used to 

(A) Generate electricity 

(B) Operate flour mills 

(C) Draw underground water 

(D) all of the above


116

What is an example of storing wind power electro-chemically?

a) Electro-hydrogen 

generation

b) Pumped storage

 c) Batteries 

d) Electric grid


117

Wind energy

a) Is clean, almost free 

and domestically 

produced

b) Has higher cost 

comparatively

c) Develops power 

proportional to the 

power of the wind

d) All of these


118

What is wind 

(A) air blowing very fast 

(B) air blowing very slow 

(C) air blowing at a point 

(D) still air 


119

Wind energy can be used to 

(A) generate electricity 

(B) operate flour mills 

(C) draw underground water 

(D) all of the above 


120

The wind speed is measured using an instrument called 

(A) hydrometer 

(B) Manometer 

(C) anemometer 

(D) wind vane


121

What is the main source for the formation of wind? 

(A) Uneven land 

(B) Sun 

(C) Vegetation 

(D) Seasons 


122

which region winds are stronger and constant? 

(A) deserts 

(B) offshore 

(C) low altitudes sites 

(D) all of above


123

____ force is responsible for forcing the global winds towards westerly direction. 

(A) Coriolis 

(B) Gravitational 

(C) Centripetal 

(D) Centrifugal


124

The range of wind speed suitable for wind power generation is 

(A) 0-5 m/s 

(B) 5-25 m/s 

(C) 25-50 m/s 

(D) 50-75 m/s


125

What are used to turn wind energy into electrical energy? 

(A) Turbine 

(B) Generators 

(C) Yaw motor 

(D) Blades 


126

Wind turbine uses 

(A) kinetic energy 

(B) potential energy 

(C) thermal energy 

(D) chemical energy 


127

Forces acting of the wind turbine blades are 

(A) viscous force 

(B) inertia force 

(C) lift & drag 

(D) none of the above 


128

Which part of the wind turbines senses wind speed, wind direction, shaft speed and torque? 

(A) Turbine blade 

(B) Shaft 

(C) Rotor 

(D) Yaw System


129

Turbines blades have ____ type cross section to extract energy from wind. 

(A) aerofoil 

(B) elliptical 

(C) rectangular 

(D) all of the above 


130

The capacity to do work is called: 

A. Heat 

B. Energy 

C. work 

D. none of the above 


131

Heat is measured in: 

A. Joule 

B. Calorie 

C. both A and B 

D. Joule/second 

132 With the increase in temperature, heat will be: 

A. increase

B. constant

 C. decrease

 D. double 


133

……………is neither created nor destroyed it can only change one form to another. 

A. work 

B. Heat 

C. Energy 

D. Mass of body 


134

The temperature at which liquid changes into vapour is called: 

A. Melting point 

B. boiling point. 

C. expansion point 

D. none of the above Biomass Energy

BIOMAS ENERGY

135

Biogas is also called as_ 

a) Bio butanol 

b) Biodiesel 

c) Bio ethanol 

d) Bio methane 


136

The mixture of biomass recourses with water is called as_ 

a) Digester 

b) Slurry 

c) Methane 

d) Biomass Mixture 


137

Following is not a source of Biomass energy 

a) Wood 

b) Rubber 

c) Vegetable Waste 

d) Wheat Grain 


138

In Biomass conversion, energy is converted into_ 

a) Solid 

b) Gas 

c) Pressure 

d) Temperature 


139

Biomass is a _______ source of energy 

a) Natural 

b) Artificial 

c) Man-made 

d) Chemical 


140

Which of the following problems are associated with Biomass Production 

a) Land Degradation 

b) Deforestation 

c) High CO2 combustion 

d) All of the above 


141

Dead organisms also come under the biomass 

a) True 

b) False 


142

Which of the forestry material can be used as biomass 

a) Logging residues 

b) Tallow 

c) Fish Oil 

d) Manure 


143

The aerobatic digestion of sewage is used to produce_ 

a) Biomass 

b) Bio Fuel 

c) Synthetic Fuel 

d) Metal Article


144

Biomass energy is generated from_ 

a) Wind energy 

b) Plant and animal waste 

c) Nuclear Energy 

d) Heat of earth 


145

Biomass is considered as renewable energy 

a) True 

b) False 


146

What is the drawback of using Biomass Energy 

a) Biomass generates air pollution 

b) Release of greenhouse gases 

c) Need lots of land to grow biomass crops 

d) All of the above 


147

Maximum generating gas in Biomass is_ 

a) CO2 

b) Methane 

c) Oxygen 

d) Nitrogen 


148

Biomass is useful to produce_ 

a) Chemical 

b) Fiber 

c) Biochemical 

d) Transportation fuel 


149

Why is biomass gasification useful?

a. To get gases which 

can be used as fuel

b. To reduce solid waste c. To increase solid 

waste

d. Biomass 

gasifiersare 

economical

Tidal Energy

TIDAL ENERGY

150

 Which of the following method of generating electric power from sea water is more advantageous?

a. Wave power 

b. Ocean Currents

 c. Tidal power 

d. None of these


151

What is/are the cause(s) of tides?

a. Gravitational pull of 

moon

b. Gravitational pull of 

moon and sun

c. Gravitational pull 

of sun and moon and 

rotation of earth

d. Gravitational pull of 

sun


152

Tidal barrage is similar to ______

a. wind plant

 b. dam 

c. wind turbines 

d. coal plant


153 Tidal barrages are a two-way tidal power system.

a. True 

b. False - -


154

Tidal power is renewable because _________

a) tide falls and rises 

without fuel

b) tide falls and rises 

with fuel

c) tide neither falls nor 

rises without fuel

d) tide neither falls nor 

rises with fuel


155

 How many high tides occur every day?

a) One 

b) Two 

c) Four 

d) Three


156

Which country has world‟s largest tidal power plant? 

a) Netherlands 

b) South Korea 

c) Laos 

d) Bolivia 


157

Tidal energy utilizes

a. Kinetic energy of water

b. Potential energy of water.

c. Both (a) and (b)

d. None of these 


158

Tidal energy development needs

a. Huge capacity and long construction time.

b. Huge capacity and low construction time. 

c. Low capacity and long construction time. 

d. Low capacity and low construction time. 


159

How many basins does a single pool tidal system have? 

a)1 

b)2

c)3 

d)4 


160

What is time period for one tide to occur in a day? 

a)6h,12.5min

b)6h,40.5min

c)6h,0min 

d)6h,25.6min 


161

How much must be the tidal range over barrage to be feasible? 

a)7meters 

b)25meters

c)10meters 

d)20meters


162

Difference between water height at high tide and water height at low tide is called _______ 

a)Tidal variation 

b)Tidal volume 

c)Tidal Range

d)Tidal CurrentHYDROGEN ENERGY

HYDROGEN ENERGY

163

Hydrogen is hazardous as a fuel because of_

a) High ignition & Low combustion energy

b) High ignition & High combustion energy

c) Low ignition & Low combustion energy

d) Low ignition & Low combustion energy


164

Fuel cell is converts_

a) Heat energy to chemical energy

b) Heat energy to electrical energy

c) Chemical energy to electrical energy

d) Kinetic energy to heat energy


165

Hydrogen fuel cell emits_

a) Water

b) Steam

c) Greenhouse gas

d) Methane


166

Chemical energy is converted to _______ energy by fuel cell

a) Solar

b) Electrical

c) Potential

d) Mechanical


167

What are the challenges for hydrogen as a fuel_

a) High storage volume

b) Flammability

c) Both a & b 

d) None of the above


168

What does the fuel cell burns for electricity

a) Nitrogen

b) Hydrogen

c) Helium

d) None of the above


169

_______ is supplied to the negative electrode of fuel cell

a) Hydrogen

b) Oxygen

c) Nitrogen

d) Selenium


170

Fuel cell combine hydrogen & oxygen to produce_

a) Sulphur dioxide, Carbon Monoxide, Pure Water 

b) Heat, Power, Ammonia

c) Electricity, Heat , Water

d) Electricity, Power, Nitrogen

\

171

Which of the following cell can convert chemical energy of O2 & H2 directly into electrical energy 

a) Mercury cell

b) Hydrogen Fuel Cell

c) Lead storage cell

d) Oxygen cell


172

Which of the following statement of fuel cell is true

a) They are more efficient

b) They are free from pollution

c) They run till reactants are active

d) All of the above

PUMPS,COMPRESSOR,TURBINE,GRADES OF ENERGY

173

A centrifugal pump is superior to a reciprocating pump because

a. It is a high speed 

pump

b. It is more economical

 c. It gives smooth flow

 d. All the above


174

 The fluid coming into the centrifugal pump is accelerated by _______

a. Throttle b. Impeller c. Nozzle d. Governor


175

Centrifugal pumps transfer energy from _______ 

a) Rotor to fluid 

b) Fluid to rotor 

c) Draft to rotor

d) None of above


176

In a centrifugal pump the liquid enters the pump....... 

a. At the top 

b. At the bottom 

c. At the centre 

d. From sides


177

In centrifugal pump which part controls the flow rate? 

A. Pump 

B. Tank pipe 

C. Head 

D. Valve


178

Centrifugal pump is convert the........ 

A. Hydraulic energy into kinetic energy 

B. Kinetic energy into hydraulic energy 

C. Mechanical energy into hydraulic energy 

D. Mechanical energy into kinetic energy


179

Hydraulic energy is converted into another form of energy by hydraulic machines. What form of 

energy is that?

a) Mechanical Energy

b) Nuclear Energy

c) Elastic Energy 

d) None of above


180

Motion of a liquid in a volute casing of a centrifugal pump is an example of 

a. Rotational Flow 

b. Radial 


182

Function of steam nozzle is to convert the pressure energy into 

a. Kinetic energy 

b. Mechanical energy


183

Steam turbine is used to produce...... Energy by expanding high pressure steam 

a. Mechanical energy 

b. Pressure energy


184

Hydraulic turbines are used to convert...... Energy of water into.... Energy 

a. Mechanical, Electrical 

b. Kinetic, Mechanical


185

145.. ...... Is a device which takes surrounding air and compress it too high pressure 

a. Compressor 

b. Centrifugal Pump


186

..... Is a machine which converts hydraulic energy into mechanical energy 

a. Centrifugal Pump 

b. Hydraulic Turbine


187

Compressed air can be used in driving the mining machinery where fire risks are more 

a. True

b. False

188

Pelton turbine has special buckets known as 

a. Oval Shaped 

b. Semi Elliptical double Cup shaped

189

Centrifugal pump has volute type of casing

a. True 

b. False190

Centrifugal pump works on the principle of forced vertex flow 

a. True 

b. False

191

The...... Is provided in pelton turbine to regulate the water flow to nozzle 

a. Deflector 

b. Spear Arrangement

192

In pelton turbine....... Act as a hydraulic brake 

a. Breaking Jet 

b. Spur Arrangement

193

The rate of energy available at shaft of the turbine is known as 

a. Output Power 

b. Input Power

194

Pelton turbine is impulse type of turbine 

a. True 

b. False

195

.... Rotating part of of centrifugal pump which consist of vanes 

a. Impeller 

b. Shaft

196

In centrifugal pump gradually increase in area of casing reduces the velocity of flow and increases the 

pressure of liquid 

a. True 

b. False

197

.... Is a mechanical device which when connected in pipeline converts the mechanical energy supplied 

into hydraulic energy and transfers it to liquid 

a. Turbine 

b. Pump

198

During the suction stroke of compressor piston moves from ...... 

a. TDC - BDC 

b. BDC- TDC

199

In single acting reciprocating compressor suction and compression off air takes place 

a. Only one side of piston 

b. Both side of piston

200

Water stored at the height is allows ..... Energy in the water striking on blades 

a. Kinetic energy 

b. Pressure energy201

Positive displacement pumps are capable of developing ______ pressures, in _______ suction pressure.

a) High, low

b) Low, high

c) High, high

d) Low, low

202

Reciprocating pump is a ________

a) Negative displacement pump

b) Positive displacement pump

c) Diaphragm pump

d) Emulsion pump

203

Reciprocating pumps operate by drawing ______ into the chamber.

a) Liquid

b) Pressure

c) Heat

d) Electricity

204

Centrifugal pump is a_________

a) Turbo machinery

b) Flow regulating device

c) Drafting device

d) Inter cooling device

205

Centrifugal pumps transfer energy from _______

a) Rotor to fluid

b) Fluid to rotor

c) Draft to rotor

d) None of above

206

In a centrifugal pump the liquid enters the pump .......

a. At the top

b. At the bottom

c. At the centre

d. From sides

207

Which of the following is NOT a type of positive displacement pumps?

a. Reciprocating pump b. Rotary displacement 

pump

c. Centrifugal pump d. None of the above

208 Discharge capacity of the reciprocating pump is __________ that of the centrifugal pump.

a. higher than b. lower than c. same as d. unpredictable

209

Which pump is more suitable for an application where very high pressure is required to be developed 

at moderate discharge?

a. Reciprocating 

pump

b. Centrifugal pump c. Turbine d. None of the above210

Which of the following statement is correct?

a. The centrifugal

pump is suitable for

large discharge and

smaller heads

b. The centrifugal pump

requires less floor area

and simple foundation

as compared to

reciprocating pump

c. The efficiency of

centrifugal pump is

less as compared to

reciprocating pump

d. All of the above

211 A hydraulic turbine converts the potential energy of water into

a. Kinetic energy a. b. Heat energy b. c. Thermal energy c. d. Gravitational energy

212 Which kind of turbines changes the pressure of the water entered through it?

a. Reaction turbines

b. Impulse turbines c. Reactive turbines d. Kinetic turbines

213 Which type of turbine is used to change the velocity of the water through its flow?

a. Kinetic turbines b. Axial flow turbines c. Impulse turbines d. Reaction turbines

214 Which of the following is an example of impulse turbine?

a. Propeller turbine b. Francis turbine c. Kaplan turbine d. Pelton wheel

215 Reciprocating air compressor is best suited for......

a. Large quantity of 

air at high pressure

b. Small quantity of air 

at high pressure

c. Small quantity of air 

at low pressure

d. Large quantity of air 

at low pressure

216 Rotary compressor is best suited for.......

a. Large quantity of 

air at high pressure

b. Small quantity of air 

at high pressure

c. Small quantity of air 

at low pressure

d. Large quantity of 

air at low pressure

217 The pressure of air at the beginning of the compression stroke is......atmospheric pressure

a. Equal to b. Less than c. More than d. None of the above

218 The speed of the rotary compressor is.......as compared to reciprocating air compressor

a. High b. Low c. Equal d. None of the above

219 Compressors are similar to

a. gears b. flywheel c. pumps d. turbines

220 Reciprocating compressors use ___ driven by a ___

a. belt, pulley b. chain, sprocket c. pistons, crankshaft d. any of the above

221

which of the following is a type of energy? 

a) high grade energy

b) low grade energy 

c) both of the mentioned 

d) none of the mentioned222

which of the following is an example of high grade energy? 

a) mechanical work

b) electrical energy

c) water power and wind power

d) all of the mentioned

223

Which of the following is an example of low grade energy?

a) heat or thermal energy 

b) heat from nuclear fission or fusion 

c) heat from combustion of fossil fuel 

d) all of the mentioned

224

The part of ____ available for conversion is referred to ____ 

a) high grade energy, available energy

b) low grade energy, available energy 

c) low grade energy, unavailable energy

d) high grade energy, unavailable energy 

225

Electrical energy and chemical energy are 

a. High grade energy 

b. Low grade energy

226

Heat is high grade energy because it rapidly dissipates due to randomly disturb molecules 

a. True 

b. Falsc. Forced vortex flow 

d. None of above

181

The complete conversion of heat into shaft-work is impossible. 

a) true

b) false 

182

Function of steam nozzle is to convert the pressure energy into 

a. Kinetic energy 

b. Mechanical energy

183

Steam turbine is used to produce...... Energy by expanding high pressure steam 

a. Mechanical energy 

b. Pressure energy

184

Hydraulic turbines are used to convert...... Energy of water into.... Energy 

a. Mechanical, Electrical 

b. Kinetic, Mechanical

185

145.. ...... Is a device which takes surrounding air and compress it too high pressure 

a. Compressor 

b. Centrifugal Pump

186

..... Is a machine which converts hydraulic energy into mechanical energy 

a. Centrifugal Pump 

b. Hydraulic Turbine

187

Compressed air can be used in driving the mining machinery where fire risks are more 

a. True

b. False

188

Pelton turbine has special buckets known as 

a. Oval Shaped 

b. Semi Elliptical double Cup shaped

189

Centrifugal pump has volute type of casing

a. True 

b. False190

Centrifugal pump works on the principle of forced vertex flow 

a. True 

b. False

191

The...... Is provided in pelton turbine to regulate the water flow to nozzle 

a. Deflector 

b. Spear Arrangement

192

In pelton turbine....... Act as a hydraulic brake 

a. Breaking Jet 

b. Spur Arrangement

193

The rate of energy available at shaft of the turbine is known as 

a. Output Power 

b. Input Power

194

Pelton turbine is impulse type of turbine 

a. True 

b. False

195

.... Rotating part of of centrifugal pump which consist of vanes 

a. Impeller 

b. Shaft

196

In centrifugal pump gradually increase in area of casing reduces the velocity of flow and increases the 

pressure of liquid 

a. True 

b. False

197

.... Is a mechanical device which when connected in pipeline converts the mechanical energy supplied 

into hydraulic energy and transfers it to liquid 

a. Turbine 

b. Pump

198

During the suction stroke of compressor piston moves from ...... 

a. TDC - BDC 

b. BDC- TDC

199

In single acting reciprocating compressor suction and compression off air takes place 

a. Only one side of piston 

b. Both side of piston

200

Water stored at the height is allows ..... Energy in the water striking on blades 

a. Kinetic energy 

b. Pressure energy201

Positive displacement pumps are capable of developing ______ pressures, in _______ suction pressure.

a) High, low

b) Low, high

c) High, high

d) Low, low

202

Reciprocating pump is a ________

a) Negative displacement pump

b) Positive displacement pump

c) Diaphragm pump

d) Emulsion pump

203

Reciprocating pumps operate by drawing ______ into the chamber.

a) Liquid

b) Pressure

c) Heat

d) Electricity

204

Centrifugal pump is a_________

a) Turbo machinery

b) Flow regulating device

c) Drafting device

d) Inter cooling device

205

Centrifugal pumps transfer energy from _______

a) Rotor to fluid

b) Fluid to rotor

c) Draft to rotor

d) None of above

206

In a centrifugal pump the liquid enters the pump .......

a. At the top

b. At the bottom

c. At the centre

d. From sides

207

Which of the following is NOT a type of positive displacement pumps?

a. Reciprocating pump b. Rotary displacement 

pump

c. Centrifugal pump d. None of the above

208 Discharge capacity of the reciprocating pump is __________ that of the centrifugal pump.

a. higher than b. lower than c. same as d. unpredictable

209

Which pump is more suitable for an application where very high pressure is required to be developed 

at moderate discharge?

a. Reciprocating 

pump

b. Centrifugal pump c. Turbine d. None of the above210

Which of the following statement is correct?

a. The centrifugal

pump is suitable for

large discharge and

smaller heads

b. The centrifugal pump

requires less floor area

and simple foundation

as compared to

reciprocating pump

c. The efficiency of

centrifugal pump is

less as compared to

reciprocating pump

d. All of the above

211 A hydraulic turbine converts the potential energy of water into

a. Kinetic energy a. b. Heat energy b. c. Thermal energy c. d. Gravitational energy

212 Which kind of turbines changes the pressure of the water entered through it?

a. Reaction turbines

b. Impulse turbines c. Reactive turbines d. Kinetic turbines

213 Which type of turbine is used to change the velocity of the water through its flow?

a. Kinetic turbines b. Axial flow turbines c. Impulse turbines d. Reaction turbines

214 Which of the following is an example of impulse turbine?

a. Propeller turbine b. Francis turbine c. Kaplan turbine d. Pelton wheel

215 Reciprocating air compressor is best suited for......

a. Large quantity of 

air at high pressure

b. Small quantity of air 

at high pressure

c. Small quantity of air 

at low pressure

d. Large quantity of air 

at low pressure

216 Rotary compressor is best suited for.......

a. Large quantity of 

air at high pressure

b. Small quantity of air 

at high pressure

c. Small quantity of air 

at low pressure

d. Large quantity of 

air at low pressure

217 The pressure of air at the beginning of the compression stroke is......atmospheric pressure

a. Equal to b. Less than c. More than d. None of the above

218 The speed of the rotary compressor is.......as compared to reciprocating air compressor

a. High b. Low c. Equal d. None of the above

219 Compressors are similar to

a. gears b. flywheel c. pumps d. turbines

220 Reciprocating compressors use ___ driven by a ___

a. belt, pulley b. chain, sprocket c. pistons, crankshaft d. any of the above

221

which of the following is a type of energy? 

a) high grade energy

b) low grade energy 

c) both of the mentioned 

d) none of the mentioned222

which of the following is an example of high grade energy? 

a) mechanical work

b) electrical energy

c) water power and wind power

d) all of the mentioned

223

Which of the following is an example of low grade energy?

a) heat or thermal energy 

b) h eat from nuclear fission or fusion 

c) heat from combustion of fossil fuel 

d) all of the mentioned

224

The part of ____ available for conversion is referred to ____ 

a) high grade energy, available energy

b) low grade energy, available energy 

c) low grade energy, unavailable energy

d) high grade energy, unavailable energy 

225

Electrical energy and chemical energy are 

a. High grade energy 

b. Low grade energy

226

Heat is high grade energy because it rapidly dissipates due to randomly disturb molecules 

a. True 

b. Fals







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