Engineering :: Heat Engines
|
|
|
|
|
341. |
Dehydration is the process of removal of |
A. |
hydrogen from water |
B. |
hydrogen from alcohols |
C. |
hydrogen from hydrocarbon |
D. |
moisture from anything that is wet |
E. |
addition of water vapour to a substance |
|
|
Answer: Option D
Explanation:
|
342. |
If a heat engine given an output of 3.5 kW and input is 10000 Joules per second, the thermal efficiency of the engine will be |
Answer: Option B
Explanation:
|
343. |
Water gas is a mixture of |
A. |
CO and H2 |
B. |
N2 and H2 |
C. |
CO2 and N2 |
D. |
CO, CO2 and SO2 |
E. |
SO2, CO2 and N2 |
|
|
Answer: Option A
Explanation:
|
344. |
The steam in a boiler drum is always |
A. |
Wet |
B. |
Dry |
C. |
Dry and saturated |
D. |
Wet or dry and saturated |
E. |
Superheated |
|
|
Answer: Option A
Explanation:
|
345. |
A fuel of octane rating 85 matches the antiknock qualities of mixture consisting of |
A. |
85% petrol + 15% diesel |
B. |
15% petrol + 85% diesel |
C. |
85% benzene + 15% methyl alcohol |
D. |
85% heptane + 15% octane |
E. |
85% octane + 15% heptane |
|
|
Answer: Option E
Explanation:
|
346. |
The missing quantity in a steam engine can be reduced by all of the following methods EXCEPT: |
A. |
Steam jacketing of cylinder walls |
B. |
Reducing the speed of the engine |
C. |
Superheating the steam supplied to the engine |
D. |
Dompounding the expansion of steam in two or more cylinders |
Answer: Option B
Explanation:
|
347. |
Within the boiler the temperature of steam is highest in |
A. |
Water drum |
B. |
water tubes |
C. |
Water walls |
D. |
Superheater inlet |
E. |
Superheater outlet |
|
|
Answer: Option E
Explanation:
|
348. |
The intercept of Willian's line on Y-axis at the origin, gives |
A. |
Missing quantity |
B. |
Frictional horse power |
C. |
No load steam consumption |
D. |
Idling speed |
E. |
All of the above |
|
|
Answer: Option D
Explanation:
|
349. |
During throttle governing of steam engines |
A. |
Cut off of the engine cylinder changes according to the load |
B. |
Pressure of steam supplied does not change with the load |
C. |
Thermal efficiency of the engine reduces |
D. |
Mechanical efficiency of the engine increases |
E. |
None of the above |
|
|
Answer: Option C
Explanation:
|
350. |
Clapeyron equation is applicable |
A. |
To systems in equilibrium |
B. |
To change of boiling point |
C. |
To change of melting point |
D. |
For change of state when two phases are in equilibrium |
E. |
All of the above |
|
|
Answer: Option D
Explanation:
|
Read more:
|
|