WorksheetsKARTHI
Total questions: 120
Worksheet time: 6hrs 0mins
Name
Class
Date
1.
In thermal plant,………… coal is used as fuel.
a)
small
b)
medium
c)
large
d)
pulvarized
2.
For unloading wagon,wagon ……………… is used.
a)
tripller
b)
hooks
c)
pullys
d)
none
3.
How many heat exchangers are present in boiler?
a)
1
b)
2
c)
3
d)
4
4.
What is used to make super heated steam in boilers?
a)
furnace
b)
super heaters
c)
economisers
d)
none
5.
The major heat loss in a staem power station occurs in .
a)
condenser
b)
heat chamber
c)
spillways
d)
penstock
6.
Rankine cycle efficiency in a good steam power station may be in the range between........
a)
15-20%
b)
35-40%
c)
50-60%
d)
90-95%
7.
The thermal efficiency of a steam power station is.....
a)
0.38
b)
0.29
c)
0.4
d)
0.45
8.
Which of the following station is least efficient........
a)
nuclear
b)
diesel
c)
thermal
d)
none
9.
Standby loss is maximum in.......
a)
thermal plant
b)
nuclear
c)
diesel plant
d)
gas plant
10.
The efficiency of chimney is approximately........
a)
0.2
b)
0.1
c)
0.01
d)
0.65
11.
Modern steam plants works on which of the following cycles?
a)
carnot cycle
b)
rankine cycle
c)
otto cycle
d)
bell-coleman cycle
12.
Turbines are coupled with……………….. .
a)
condenser
b)
cooling tower
c)
alternator
d)
boiler
13.
…………… water is feed back to economiser.
a)
feed water
b)
steam
c)
makeup water
d)
none
14.
Fly ash generally results from …………
a)
diesel
b)
gas
c)
pulvarised coal
d)
none
15.
What type of equipment is used in thermal power plant to avoid air pollution?
a)
precipitator
b)
filter
c)
stock
d)
tower
16.
The only place where slip ring induction motors used in thermal power plants is
a)
condenser
b)
conveyor
c)
fuel handling
d)
none
17.
To improve the efficiency of thermal power plant ________________ is placed between boiler and turbine.
a)
economiser
b)
superheater
c)
biler drum
d)
cooling tower
18.
Cheapest plant in operation and maintenance is ………...
a)
thermal plant
b)
nuclear plant
c)
hydro plant
d)
all the above
19.
What type of machine is used to make pulvarised coal?
a)
tripller
b)
crusher
c)
rotating
d)
all the above
20.
Load sheding means ………
a)
reduced voltage
b)
reduced current
c)
reduced frequency
d)
switch off some loads
21.
Hydro power plant is made in ………… area.
a)
hilly area
b)
swamp
c)
grass land
d)
planes
22.
The cheapest plant in operation and maintenance is..
a)
hydro
b)
thermal
c)
nuclear
d)
gas plant
23.
Pelton turbines are mostly........
a)
horizontal
b)
vertical
c)
inclined
d)
none of the above
24.
Location of the surge tank in a hydro-electric station is near to the........
a)
tailrace
b)
turbine
c)
reservoir
d)
none o the above
25.
Pelton wheel turbine is used for minimumof the following heads........
a)
40m
b)
120m
c)
150m
d)
180 or above
26.
In high head hydro power plant the velocity of water in penstock is about........
a)
1m/s
b)
4m/s
c)
7m/s
d)
12m/s
27.
The maximum limited head for a Kaplan turbine is___________.
a)
30m
b)
70m
c)
10m
d)
100m
28.
The power output from hydro plant depends upon…….. .
a)
head
b)
discharge
c)
effeciency
d)
all the above
29.
The function of surge tank is ……….
a)
supply water
b)
reduce pressure
c)
flood control
d)
none
30.
What takes water from reservoir to the turbine?
a)
spillways
b)
catchment
c)
penstock
d)
none
31.
What is used to remove excess water from reservoir?
a)
penstock
b)
spillways
c)
turbine
d)
none
32.
Run off plants do not contain ……….
a)
turbine
b)
alternator
c)
power house
d)
storage
33.
The capacity of pondage plants are………. As compare to storage plant.
a)
less
b)
more
c)
constant
d)
none
34.
To store the water in reservoir …………… is made.
a)
surge tank
b)
dam
c)
power house
d)
none
35.
Arch and trapezoidal are the types of …….
a)
dam
b)
penstock
c)
surge tank
d)
valve
36.
Hydrology is the study of ……….
a)
power
b)
load
c)
water
d)
none
37.
What are the types of hydro turbines?
a)
kaplan
b)
francis
c)
propeller
d)
all the above
38.
For very high heads of plants, …………. Type of turbine is used.
a)
kaplan
b)
francis
c)
propeller
d)
none
39.
To control the water flow in penstock,……is used.
a)
intake gates
b)
spillways
c)
channels
d)
none
40.
Out take gates are used near………..
a)
dam
b)
surge tank
c)
turbine
d)
none
41.
where is water hammer exists?
a)
turbine
b)
penstock
c)
dam
d)
all the above
42.
To remove water hammer from penstock,……….. Is used.
a)
surge tank
b)
spillways
c)
dam
d)
none
43.
The location of nuclear power plant must be……..
a)
near the load centre
b)
away from load centre
c)
anywhere
d)
none
44.
Thermal plant uses ……… cycle.
a)
open
b)
rankine
c)
both
d)
none
45.
Nuclear reactor usually employ…….
a)
fussion
b)
fission
c)
both
d)
none
46.
The nuclear energy is measured as…….
a)
MeV
b)
MW
c)
KWhr
d)
none
47.
The difference between dam height and tailtrace is known as……..
a)
height
b)
head
c)
lattitude
d)
none
48.
In boiling water reactor, water is used as ……..
a)
coolant
b)
moderator
c)
both
d)
none
49.
What is released in chain reaction in nuclear reactor?
a)
neutrons
b)
protons
c)
electrons
d)
none
50.
What is used to slow down the speed of neutrons in reactor?
a)
shielding
b)
coolant
c)
moderator
d)
all the above
51.
……..is used to stop the chain reaction in reactors.
a)
moderator
b)
control rods
c)
shielding
d)
none
52.
………is used to prevent radioactive radiations to reach outside reactor.
a)
control rods
b)
coolant
c)
shielding
d)
none
53.
The length of microwaves is ……..
a)
small
b)
large
c)
medium
d)
none
54.
Which of the following is not used as moderator?
a)
water
b)
heavy water
c)
graphite
d)
boron
55.
Which of the following has highest moderating ratio?
a)
D2O
b)
H2O
c)
carbon
d)
Helium
56.
What is the overall efficiency of nuclear power plant?
a)
20%-25%
b)
25%-30%
c)
30%-40%
d)
50%-70%
57.
In all plant minimum quality of fuel is required in........
a)
thermal plant
b)
hydro plant
c)
Nuclear plant
d)
gas plant
58.
Reflectors of a nuclear reactors are made of........
a)
Boron
b)
Cast iron
c)
Beryllium
d)
steel
59.
The nuclear energy is measured as........
a)
MeV
b)
Mw
c)
curie
d)
none of the above
60.
The conversion ratio of a breeder reactor is........
a)
equal to unity
b)
more than unity
c)
less than unity
d)
none of the above
61.
For point to point communication,………waves are used.
a)
infrared
b)
radio
c)
micro
d)
none
62.
The diesel power plant should be …….to the load centre.
a)
far
b)
near
c)
may vary
d)
none
63.
In diesel plant ………ia also required.
a)
water
b)
coal
c)
radioactive
d)
none
64.
……..system is required in diesel plant to remove by product gases.
a)
air intake
b)
exhaust
c)
fuel
d)
none
65.
For large diesel engines,……is used for initial startup.
a)
handle
b)
DG set
c)
compressed air
d)
none
66.
For small diesel engines,……is used for initial startup.
a)
handle
b)
DG set
c)
compressed air
d)
none
67.
To give air to diesel engine,…….system is used.
a)
exhaust
b)
air intake
c)
dry tank
d)
none
68.
Before giving oil to diesel engine, oil is stored in ……….tank.
a)
strainer
b)
main
c)
dry
d)
none
69.
The speed of the diesel engine may vary from
a)
0-100rpm
b)
200-1000rpm
c)
500-5000rpm
d)
1000-3000rpm
70.
What is the ranging capacity of the diesel plant?
a)
50-750kW
b)
100 – 1175 kW
c)
75 – 3750 kW
d)
150 – 4575 kW
71.
Which type of cylinder configuration is commonly used?
a)
vertical-in line
b)
V type
c)
horizontal type
d)
all of these
72.
The lubrication cost in a diesel power plant is
a)
high
b)
low
c)
moderate
d)
very low
73.
The identification of a two stroke engine is given by
a)
cooling system
b)
lubrication system
c)
absence of valve
d)
all of these
74.
High output diesel engines are started by
a)
self starter
b)
compressed air
c)
battery
d)
cranking
75.
The temperature of the cooling water leaving the diesel engine should not exceed.
a)
25 °C
b)
40 °C
c)
70 °C
d)
85 °C
76.
Maximum temperature developed in a diesel engine is in the range of
a)
2000 - 2500 °C
b)
500 – 1000 °C
c)
1500 – 2000 °C
d)
1000 – 1500 °C
77.
Heating value of diesel is around?
a)
4000 kcal/kg
b)
10000 kcal/kg
c)
15000 kcal/kg
d)
20000 kcal/kg
78.
The distribution of heat imparted to the diesel engine is called ……..
a)
coolant
b)
heat balance
c)
slury
d)
none
79.
In gas turbine plant, fuel is burnt in ……….chamber.
a)
exhaust
b)
intake
c)
combustion
d)
none
80.
Gas turbines work on ……….. Of gases.
a)
contraction
b)
expansion
c)
both
d)
none
81.
Gas turbines uses ……….. Cycle for efficiency calculation.
a)
rankine
b)
karnaugh
c)
brayton
d)
none
82.
What is input energy for photovoltaic cell?
a)
wind
b)
solar
c)
hydro
d)
thermal
83.
Concentrated solar power system uses ……
a)
lense
b)
mirror
c)
both
d)
none
84.
Fuel cell converts ……..energy into electricity.
a)
solar
b)
chemical
c)
wind
d)
thermal
85.
Tidal power generation uses………
a)
height of tides
b)
kinetic energy of water
c)
either of a or b
d)
both
86.
Barrages uses ………..energy of water.
a)
kinetic
b)
potential
c)
both
d)
none
87.
In stream devices, ………….energy of water is used.
a)
kinetic
b)
potential
c)
both
d)
none
88.
Dry steam and flash steam are the types of ……………..power plant.
a)
tidal
b)
hydro
c)
geothermal
d)
fuel
89.
Energy from gravitational field is energy obtained from
a)
wind
b)
biomass
c)
coal
d)
tides
90.
Tidal pull of moon can distort continents pulling up and down up to
a)
25cm
b)
30cm
c)
35cm
d)
40cm
91.
Ability of capacitor to store charge is measured as its
a)
performance
b)
capacitance
c)
Resistance
d)
durability
92.
Conversion of chemical energy to electrical energy can be achieved by
a)
electric generator
b)
solar cell
c)
cell
d)
both a & b
93.
Original source of energy coming from tides is
a)
stars
b)
moon
c)
earth
d)
tornedo
94.
A fuel cell, in order to produce electricity, burns
a)
hydrogen
b)
nitrogen
c)
helium
d)
none of the above
95.
Which of the following is a non-renewable resource?
a)
forest
b)
wildlife
c)
coal
d)
water
96.
Which of the following is a disadvantage of most of the renewable energy sources?
a)
Highly polluting
b)
High waste disposal cost
c)
Unreliable supply
d)
High running cost
97.
Steam reforming is currently the least expensive method of producing:
a)
coal
b)
biogas
c)
hydrogen
d)
Natural gas
98.
Horizontal axis and vertical axis are the types of:
a)
wind mills
b)
nuclear reactor
c)
biogas reactor
d)
solar cell
99.
Fuel cells are:
a)
carbon cell
b)
hydrogen battery
c)
nuclear cell
d)
chromium cell
100.
Photovoltaic energy is the conversion of sunlight into:
a)
chemical energy
b)
biogas
c)
electricity
d)
geo thermal energy
101.
A fuel cell, in order to produce electricity, burns:
a)
helium
b)
hydrogen
c)
nitrogen
d)
none o the above
102.
For obtaining solar energy during sunlight, energy is stored in batteries of
a)
Nickel cadmium
b)
zinc cadmium
c)
Nickel zinc
d)
hydrogen
103.
The rotating part of hydro turbine is known as ……………..
a)
runner
b)
head
c)
channel
d)
intake
104.
What type of wind energy is converted into electric energy by wind turbines?
a)
potential
b)
kinetic
c)
inertia
d)
none
105.
Typical value of voltage given to industrial area is…………
a)
33KV
b)
220KV
c)
110KV
d)
none
106.
What is the example of non renewable power plant?
a)
coal plant
b)
hydro
c)
diesel plant
d)
gas plant
107.
the combined transmission and distribution network is known as…………
a)
power plant
b)
generating sation
c)
power grid
d)
none
108.
skin effect is in ……………transmission.
a)
AC
b)
DC
c)
both
d)
none
109.
By using multiple cores in a cable………..losses get reduce.
a)
impedance
b)
corona
c)
core
d)
iron
110.
The HVDC system has ______________ disadvantage.
a)
synchronous
b)
Asynchronous
c)
both
d)
none
111.
In AC transmission __________ number of conductors are used.
a)
two
b)
three
c)
both
d)
none
112.
In DC transmission __________ number of conductors are used.
a)
two
b)
three
c)
both
d)
none
113.
Which of the following is usually not the generating voltage ?
a)
6.6kV
b)
9.9kV
c)
11kV
d)
132kV
114.
Which of the following is not the transmission voltage in America ?
a)
66kV
b)
132kV
c)
264kV
d)
400kV
115.
Out of the following which one is not a unconventional source of energy ?
a)
Tidal
b)
Geothermal
c)
Wind
d)
Nuclear
116.
Coal used in power plant is also known as
a)
steam coal
b)
charcoal
c)
coke
d)
soft coal
117.
When pulverized fuel is not used, the equipment used for supplying coal to the boiler is
a)
heater
b)
burner
c)
stoker
d)
skip hoist
118.
Overall thermal efficiency of a steam power station is in the range
a)
18-24%
b)
30-40%
c)
44-62%
d)
68-79%
119.
Most of the generators in thermal power plants run at
a)
3000rpm
b)
1500rpm
c)
1000rpm
d)
750rpm
120.
Standard frequency usually for electric supply is
a)
50Hz
b)
60Hz
c)
50-60Hz
d)
50-55Hz
100 %
