Mechanical Engineering - Steam Boilers and Engines

26.
The draught is the __________ of pressures above and below the fire grate.
sum
difference
Answer: Option
Explanation:
No answer description is available. Let's discuss.

27.
The function of an eccentric is to provide __________ motion to the slide valve.
reciprocating
rotary
Answer: Option
Explanation:
No answer description is available. Let's discuss.

28.
The water tubes in a Babcock and Wilcox boiler are
vertical
horizontal
inclined
Answer: Option
Explanation:
No answer description is available. Let's discuss.

29.
In case of condensing steam engines, the pressure of steam in the cylinder during exhaust stroke is __________ the atmospheric pressure.
equal to
lower than
higher than
Answer: Option
Explanation:
No answer description is available. Let's discuss.

30.
Blow off cock in a boiler is used to
control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required
empty the boiler when required and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler
put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit
increase the temperature of saturated steam without raising its pressure
Answer: Option
Explanation:
No answer description is available. Let's discuss.