In thermal power plant, economiser are used to heat Feed water Air None of these Steam TRUE ANSWER : ? YOUR ANSWER : ?
If the load factor of a power station increases, the cost of per unit generation will Decreases Increases Data incomplete Remains same TRUE ANSWER : ? YOUR ANSWER : ?
Underfeed stokers work best for __________ coals high in volatile matter and with caking tendency Lignite Anthracite All of these Semi-bituminous and bituminous TRUE ANSWER : ? YOUR ANSWER : ?
A steam power station requires space More than diesel power station Less than diesel power station None of these Equal to diesel power station TRUE ANSWER : ? YOUR ANSWER : ?
Rankine cycle operating on low pressure limit of p1 and high pressure limit of p2 Has higher thermal efficiency than the Carnot cycle operating between same pressure limits Has same thermal efficiency as Carnot cycle operating between same pressure limits Has lower thermal efficiency than Carnot cycle operating between same pressure limit May be more or less depending upon the magnitude of p1 and p2 TRUE ANSWER : ? YOUR ANSWER : ?
Evaporative type of condenser has water in pipes surrounded by steam steam in pipes surrounded by water None of these either (A) or (B) TRUE ANSWER : ? YOUR ANSWER : ?
The efficiency of a modern boiler using coal and heat recovery equipment is about 25 to 30% 85 to 90% 40 to 50% 65 to 70% TRUE ANSWER : ? YOUR ANSWER : ?
Rankine cycle efficiency of a good steam power plant may be in the range of 15 to 20 percent 70 to 80 percent 35 to 45 percent 90 to 95 percent TRUE ANSWER : ? YOUR ANSWER : ?
Blowing down of boiler water is the process to increase the steam temperature None of these to control the solid concentration in the boiler water by removing some of the concentrated saline water to reduce the boiler pressure TRUE ANSWER : ? YOUR ANSWER : ?
Economiser improve the boiler efficiency by 4 to 10% 10 to 12 % 13 to 15 % 1 to 5 % TRUE ANSWER : ? YOUR ANSWER : ?