01. Length of the cable is doubled, its capacitance C will be
one-fourth.
one-half.
doubled.
unchanged.
02. Tarapur nuclear power plant has which type of reactor?
Pressurized water reactors.
Boiling water type.
CANDU type reactors.
None of these.
03. Which of the following rotor is used in thermal power plants?
cylindrical rotor
salient pole rotor
either of these
squirrel cage rotor
04. India’s largest thermal power station is located at
Kota.
Sarni.
Chandrapur.
Neyveli.
05. What should be the minimum depth (in metre)of cable trench to dug for laying of 1.1 kV?
0.75.
0.90.
1.05.
1.20.
06. NTPC (National Thermal Power Cooperation) has its only thermal power generating unit in West Bengal at
Durgapur.
Bakreshwar.
Farakka.
Katwa.
07. Galvanised steel is generally used as
stray wire.
earth wire.
structural components.
all of the above.
08. Plug setting of a relay can be altered by varying
air gap of magnetic path.
no. of ampere-turns.
adjustable back up stop.
none of these.
09. Objectives of power system is/are
Cost of electrical energy per KWh is to be minimum
Rated voltage and frequency has to be supplied to the consumers
both 1 and 2
nether 1 nor 2
10. Advantages of higher transmission voltage is/are
Power transfer capability of the transmission line is increased
Transmission line losses are reduced
Area of cross section and volume of the conductor is reduced
all of the above
11․ Which of the following statement is true
At higher voltage, cost of transmission is reduced
At higher voltage, cost of transmission is increased
efficiency decreased
all of the above
12. Maximum power transfer capability of transmission line can be increased by
Parallel transmission lines
Using series capacitance
Using bundled conductors
all of the above
13. For flat voltage profile system, voltage regulation is
0%
100%
50%
any of the above
14. Maximum power transfer in a transmission line can be obtained by
increasing voltage level
reducing reactance
either 1 or 2
none of the above
15. Ferranti effect will not occur in which of the following transmission lines
long transmission lines
short transmission lines
medium transmission lines
all of the above
16. Which of the following methods is/are used for reactive or voltage compensation
shunt capacitor
series capacitor
generation excitation control
all of the above
17. Ferranti effect can be compensated by which of the following
shunt capacitor
shunt reactor
series capacitor
both 1 and 2
18. Stability of a transmission line can be increased by
shunt capacitor
series capacitor
shunt reactor
both 1 and 2
19. Which of the following method is used for changing power factor from leading to lagging
shunt capacitor
series capacitor
shunt reactor
any of the above
20. Under over excitation synchronous phase modifier works as
shunt capacitor
series capacitor
shunt reactor
any of the above
21. Under excited Synchronous phase modifier works as
shunt capacitor
series capacitor
shunt reactor
any of the above
22. Specified quantities of load bus are
P and Q
V and δ
P and δ
Q and V
23. Specified quantities of slack bus are
P and Q
V and δ
P and δ
P and V
24. Telecommunication lines are transposed to reduce the
efficiency
radio interference in communication lines
voltage level
all of the above
25. Which of the following produces the radio interference in communication lines?
electro magnetic induction
electro static induction
both 1 and 2
none of the above
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