Sunday, 17 November 2019

Hydroelectric power plant Basic questions and answers | MCQs on Hydroelectric power plant 05


1).Consider the following statements regarding pumped storage plants.
1)    A pumped storage plant is a base load plant.
2)    The starting time of a pumped storage plant is very short.
3)    Reversible turbines and pumps are highly suitable for pumped storage plants.
    which of the statements given above are correct.
(a)1 and 2. (b)1 and 3.
(c)2 and 3. (d)1.2 and 3.




2).In pump storage hydropower plant,the electrical machine is mode
to work alternately as generator and motor. The efficiency of the generator working at the same electric power level is.
a)    greater than that as motor.
b)    equal to that as motor.
c)    greater or less than that as motor depending on the type of the machine.
d)    les then that as motor.



3).A 'pumped storage hydroelectric plant' consists of.
a)    A synchronous machine and a multistage centrifugal pump in one shaft.
b)    A synchronous machine,a reaaction turbine,and a multistage centrifugal pump all in one shaft.
c)    An induction generator, a synchronous machine and a reaction turbine, all in one shaft.
d)    An induction generator, a synchronous machine,and a multistage centrifugal pump,all in one shaft.



4).Consider the following statements:
pumped storage plants when operated in interconnected power systems serve to
a)    increase load factor of steam plant.
b)    provide added capacity to meet peak loads.
c)    decrease load factor of steam plant.
d)    provide added capacity to meet base loads.
which of the above statements are correct.
(a)1,2,3 and 4. (b)1 and 3 only.
(c)1 and 2 only. (d)3 and 4 only.





5).Consider the following statements regarding the pumped storage plants.
1)    A pumped storage plant is a peak load plant.
2)    The starting time of a pumped storage plant.
3)    Reversible turbines and pumps are very suitable for pumped storage plants.
    Pumped storage plants can be used for load frequency control which of the above statements is/are correct.
(a)1 only. (b)1 and 2 only.
(c)1,3 and 4. (d)3 and 4 only.




6).In India, pumped storage power plant.
a)    does not exist at all.
b)    exists is Rajasthan alone.
c)    exists in kadampurai.
d)    exists in haryana.



7).The pumped storage scheme is employed to supply.
a)    during the peak hours.
b)    during the off-peak hours.
c)    system base load.
d)    all of the above.



8).In pumped storage scheme the generator is also used as.
a)    induction generator ar synchronous condenser.
b)    induction generator or synchronous motor.
c)    synchronous generator or induction generator.
d)    synchronous motor or synchronous condenser.



9).pump storage schemer are used to improve.
a)    the power factor. (b)the diversity factor.
c)    the load factor. (d)the quality of voltage.
e)    the reactive power capacity.
f)    the plant capacity factor as well as the load factor of the power system.



10).A hydel power plant of run-off-river type should be provided with pondage so that the.
a)    film capacity of the plant is increased.
b)    operating head is controlled.
c)    pressure inside the turbine casing remains constant.
d)    kinetic energy of the running water is fully utilized.






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