Mechanical Engineering - Steam Boilers and Engines

46.
Cut-off governing of steam engines is a method of controlling the engine output by varying
volume of intake steam
pressure of intake steam
temperature of intake steam
all of these
Answer: Option
Explanation:
No answer description is available. Let's discuss.

47.
In a boiler, feed water supplied per hour is 205 kg while coal fired per hour is 23 kg. The net enthalpy rise per kg of water is 145 kJ. If the calorific valve of the coal is 2050 kJ/kg, then the boiler efficiency will be
56%
63%
74%
78%
Answer: Option
Explanation:
No answer description is available. Let's discuss.

48.
A safety valve mainly used with locomotive and marine boilers is
lever safety valve
dead weight safety valve
high steam and low water safety valve
spring loaded safety valve
Answer: Option
Explanation:
No answer description is available. Let's discuss.

49.
Which of the following boiler is best suited to meet the fluctuating demand of steam ?
Locomotive boiler
Lancashire boiler
Cornish boiler
Babcock and Wilcox boiler
Answer: Option
Explanation:
No answer description is available. Let's discuss.

50.
Which of the following statement is correct ?
Lancashire boiler is a fire tube boiler.
Fire tube boilers are internally fired.
Babcock and Wilcox boiler is a water tube boiler.
all of the above
Answer: Option
Explanation:
No answer description is available. Let's discuss.