পল্লী বিদ্যুৎ তে ইঞ্জিনিয়ারিং নিয়োগ পরীক্ষার সর্বাধিক গুরুত্বপূর্ণ --এখান থেকে বহু প্রশ্ন হুবুহু কমন এসেছে
a) Class A
b) Class B
c) Class AB
d) Class C
Ans: (c)
2. In flat rate tariffs, rate is fixed by taking into account their
a) diversity factor
b) load factor
c) plant use factor
d) a and b
Ans: (d)
3. While determining the regulation of an alternator by actual test, constant parameters are
a) short circuit current and excitation
b) speed and excitation
c) voltage and current
d) speed and current
Ans: (b)
4. Centralised excitable system is
a) same as unit system
b) less reliable than unit system
c) more reliable than unit system
d) none of these
Ans: (b)
5. Incremental rate is defined as
a) Rate of change of given input
b) Ratio of change in input to change in output
c) Ratio of rate of change of output to input
d) Ratio of rate of change of input to rate of change of output
Ans: (b)
6. Generators kept for spinning reserve are
a) not in operation
b) kept running on light loads
c) kept running on heavy loads
d) none of these
Ans: (b)
7. Response of separately excited exciter is
a) equal to that of self-excited generator
b) slower than that of self-excited generator
c) faster than that of self-excited generator
d) none of these
Ans: (c)
8. Speed drop of governor means
a) reduction in speed as load changes from no load to full load
b) increase in speed as load changes from no load to full load
c) degree of speed changes needed to cause a change in the output of turbine
d) none of these
Ans: (a)
9. Synchronous impedance of an alternator is defined as the ratio of open circuit voltage to the short-circuit current for same
a) speed
b) excitation
c) both (a) and (b)
d) none of these
Ans: (c)
10. Consumers pay less fixed changes in
a) two part tariff
b) flat rate tariff
c) block rate tariff
d) maximum demand tariff
Ans: (d)
11. Hydroelectric generators are
a) Stationary field type
b) Cylindrical rotor type
c) Double cage rotor type
d) Salient pole type
Ans: (d)
12. Load factor is defined as
a) Maximum demand/average demand
b) Average demand/Maximum demand
c) Maximum demand/Peak load
d) Maximum demand/Minimum load
Ans: (b)
13. For separate exciter, complication of additional rotating machine is
a) not there
b) less
c) more
d) none of these
Ans: (c)
14. Spinning reserve is that generating capacity, which is
a) Connected to the bus bar and is ready to take load
b) Always available
c) Available for service but not in use
d) Available for use but not in service
Ans: (a)
15. For greater power system stability, speed of the exciter response should always
a) decrease
b) increase
c) remain
d) zero
Ans: (b)
16. Amortization of a plant is
a) More than the plant life
b) Less than the plant life
c) Equal to the plant life
d) None of these
Ans: (b)
17. station maximum demand is mostly dependent upon
a) line losses
b) domestic consumers
c) industrial consumers
d) all of these
Ans: (c)
18. Maximum demand for a bulk consumer is measured in
a) KV
b) KVA
c) KVAR
d) KW
Ans: (b)
19. For centralized excitation system, number of exciters used are
a) more than generating units
b) less than generating units
c) equal to generating units
d) uncertain
Ans: (b)
20. Pilot exciter is needed if
a) Induction motor is used
b) Main exciter is self-excited
c) Main exciter is separately excited
d) Main exciter is not working
Ans: (c)
21. Diversity factor reduces
a) simultaneous maximum demand on stating for same individual demands
b) capital cost for the station
c) overall rate for generation of electricity
d) all of these
Ans: (d)
