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Power Plant Engineering(Engineering > Electrical Engineering ) Questions and Answers
Home
Topic
Engineering
Electrical Engineering
Power Plant Engineering
Question 1.
Rankine efficiency of a steam power plant
improves in summer as compared to that in winter
improves in winter as compared to that in summer
is unaffected by climatic conditions
none of the above
Explanation:-
Answer: Option B. ->
improves in winter as compared to that in summer
Question 2.
The artificial draught normally is designed to produce
less smoke
more draught
less chimney gas temperature
all of the above
Explanation:-
Answer: Option D. ->
all of the above
Question 3.
In a boiler installation the natural draught is produced
due to the fact that furnace gases being light go through the chimney giving place to cold air from outside to rush in
due to the fact that pressure at the grate due to cold column is higher than the pressure at the chimney base due to hot column
due to the fact that at the chimney top the pressure is more than its environmental pressure
all of the above
Explanation:-
Answer: Option B. ->
due to the fact that pressure at the grate due to cold column is higher than the pressure at the chimney base due to hot column
Question 4.
In a regenerative feed heating cycle, the greatest economy is affected
when steam is extracted from only one suitable point of steam turbine
when steam is extracted from several places in different stages of steam turbine
when steam is extracted only from the last stage of steam turbine
when steam is extracted only from the first stage of steam turbine
Explanation:-
Answer: Option B. ->
when steam is extracted from several places in different stages of steam turbine
Question 5.
In jet type condensers
cooling water passes through tubes and steam surrounds them
steam passes through tubes and cooling water surrounds them
steam and cooling water mix
steam and cooling water do not mix
Explanation:-
Answer: Option C. ->
steam and cooling water mix
Question 6.
In De Laval steam turbine
the pressure in the turbine rotor is approximately same as in condenser
the pressure in the turbine rotor is higher than pressure in the condenser
the pressure in the turbine rotor gradually decreases from inlet to exit from condenser
none from the above
Explanation:-
Answer: Option A. ->
the pressure in the turbine rotor is approximately same as in condenser
Question 7.
In ______ system fuel from a central pulverizing unit is delivered to a bunker and then to the various burners
unit
central
power
none of the above
Explanation:-
Answer: Option B. ->
central
Question 8.
The draught produced by chimney of given height at given outside temperature
decreases if the chimney gas temperature increases
increases if the chimney gas temperature increases
remains same irrespective of chimney gas temperature
may increase or decrease
Explanation:-
Answer: Option B. ->
increases if the chimney gas temperature increases
Question 9.
Compounding of steam turbine is done for
reducing the work done
increasing the rotor speed
reducing the rotor speed
balancing the turbine
Explanation:-
Answer: Option C. ->
reducing the rotor speed
Question 10.
In Rankine cycle the work output from the turbine is given by
change of internal energy between inlet and outlet
change of enthaply between inlet and outlet
change of entropy between inlet and outlet
change of temperature between inlet and outlet
Explanation:-
Answer: Option B. ->
change of enthaply between inlet and outlet
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