A. remains constant
B. increases
C. decreases
D. behaves unpredictably
E. none of the above
Related Mcqs:
- Vacuum for reciprocating steam engines compared to steam turbines is__________________?
A. more
B. equal
C. less
D. could be more or less depending on the size of plant
E. none of the above - One kg of steam sample contains 0.8 kg dry steam; it’s dryness fraction is__________________?
A. 0.2
B. 0.8
C. 1.0
D. 0.6
E. 0.5 - In an experiment to determine dryness fraction of steam, the mass of water separated was 1.2 kg in 15 mts and the mass of steam passed out in same time was 4.8 kg. Dryness fraction is__________________?
A. 40%
B. 25%
C. 50%
D. 80%
E. 90% - Expanding steam to a very low pressure (high vacuum) in steam engines is _________________?
A. desirable
B. economical
C. essential
D. optional
E. uneconomical - Theoretically, the following engine should have maximum efficiency________________?
A. gas engine
B. 2-stroke S.I. engine
C. 4-stroke S.I. engine
D. steam engine
E. 4-stroke C.I. engine - The theoretically correct mixture of air and petrol is approximately ________________?
A. 0.334027778
B. 0.500694444
C. 0.625694444
D. 0.834027778 - The hydraulic turbines are also known as : ___________?
A. steam turbines
B. water turbines
C. combustion turbines
D. Gas turbinesSubmitted by: Faheem Zaman Dhaunroo
- The saturation temperature of steam with increase in pressure increases____________________?
A. linearly
B. rapidly first and then slowly
C. slowly first and then rapidly
D. inversely
E. none of the above - The dry saturated steam at very low pressure, (5-10 kg/cm2) when throttled to atmosphere will become________________?
A. wet
B. superheated
C. remain dry satruated
D. dry
E. none of the above - Gardually increasing temperature of flue gases at inlet to chimney for given steam outputs is an indication of__________________?
A. higher effectiveness of boiler
B. high calorific value coal being burnt
C. fouling of heat transfer surfaces
D. raising of steam temperature
E. leakage of air
