21. The amount of water evaporated or steam produced in kg per kg of fuel burnt is known as power of a boiler.
TRUE
FALSE
✅ The correct answer is option A.
Steam Boilers and Engines MCQs
22. Willian’s law holds good for throttle-governed engine, but not for cut-off governed engine.
TRUE
FALSE
✅ The correct answer is option A.
23. Which of the following is a fire tube boiler ?
Lansashire boiler
Babcock and Wilcox boiler
Yarrow boiler
none of these
✅ The correct answer is option A.
24. For maximum discharge through a chimney, the temperature of flue gases inside the chimney should the slightly more than the atmospheric temperature.
Correct
Incorrect
✅ The correct answer is option A.
25. The equivalent evaporation is defined as
the ratio of heat actually used in producing the steam to the heat liberated in the furnace
the amount of water evaporated or steam produced in kg per kg of fuel burnt
the amount of water evaporated from and at 100° C into dry and saturated steam
the evaporation of 15.
✅ The correct answer is option C.
27. The high pressure and low pressure cylinders in a receiver type compound engine are regarded as having cranks
180° to each other
90° to each other
0° to each other
none of these
✅ The correct answer is option B.
28. The principal function of a stop valve is 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 temperatu
✅ The correct answer is option A.
29. In a receiver type compound engine, the high pressure and low pressure cylinders
have common piston rod
are set at 90°
have separate piston rods
are set in V – arrange
✅ The correct answer is option C.
30. There is about 15 to 20% of coal saving when an economiser is used in a boiler.
TRUE
FALSE
✅ The correct answer is option A.