72 + Mcqs in Steam Boilers and Engines in Mechanical Engineering Page 2 McqOptions

51.	A receiver type compound engine, requires a lighter flywheel.
A.	Yes
B.	No
Answer» B. No

Discussion

52.	In surface condensers, the condensate and the cooling water mixes up.
A.	True
B.	False
Answer» C.

Discussion

53.	A water level indicator is a device to indicate the exact water level in the boiler at any instant.
A.	True
B.	False
Answer» B. False

Discussion

54.	A device used to empty the boiler whenever required and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler, is called blow off cock.
A.	Yes
B.	No
Answer» B. No

Discussion

55.	A __________ in a boiler is used to put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit.
A.	blow off cock
B.	fusible plug
C.	stop valve
D.	safety valve
Answer» C. stop valve

Discussion

56.	The function of a superheater is to heat the feed water by utilising the heat in the exhaust flue gases before leaving through the chimney.
A.	Yes
B.	No
Answer» C.

Discussion

57.	When the total heat of steam is kJ/kg and the sensible heat of feed water is kJ/kg, then the factor of evaporation is given by
A.	none of these
Answer» B.

Discussion

58.	The missing quantity is mainly due to cylinder condensation and a small amount of steam leakage past the valves and piston.
A.	Agree
B.	Disagree
Answer» B. Disagree

Discussion

59.	The amount of water evaporated or steam produced in kg per kg of fuel burnt is termed as evaporative capacity of a boiler.
A.	Agree
B.	Disagree
Answer» B. Disagree

Discussion

60.	In a compound steam engine, the temperature range per cylinder is reduced, with corresponding reduction in the condensation.
A.	Correct
B.	Incorrect
Answer» B. Incorrect

Discussion

61.	The ratio of heat actually used in producing the steam to the heat liberated in the furnace is known as equivalent evaporation from and at 100° C.
A.	Correct
B.	Incorrect
Answer» C.

Discussion

62.	There is about 15 to 20% of coal saving when an economiser is used in a boiler.
A.	True
B.	False
Answer» B. False

Discussion

63.	The function of a D-slide valve is to exhaust steam from the cylinder at proper moment.
A.	Correct
B.	Incorrect
Answer» B. Incorrect

Discussion

64.	The mechanical draught produces more draught than natural draught.
A.	True
B.	False
Answer» B. False

Discussion

65.	The water tube boilers produce steam at a __________ pressure than that of fire tube boilers.
A.	lower
B.	higher
Answer» C.

Discussion

66.	The mechanical draught __________ with the amount of smoke.
A.	increases
B.	decreases
C.	does not effect
Answer» C. does not effect

Discussion

67.	When the expansion of steam is carried out in a single cylinder and then exhausted into the atmosphere or a condenser, the engine is said to be a simple steam engine.
A.	Correct
B.	Incorrect
Answer» B. Incorrect

Discussion

68.	The motion of a D-slide valve in a steam engine is simple harmonic.
A.	Yes
B.	No
Answer» B. No

Discussion

69.	A single ended Scotch marine steam boiler may have one to four furnaces which enter from front end of the boiler.
A.	Correct
B.	Incorrect
Answer» B. Incorrect

Discussion

70.	Which of the following compound steam engine requires a smaller flywheel ?
A.	Receiver type
B.	Tandem type
C.	Woolf type
D.	all of these
Answer» B. Tandem type

Discussion

71.	The ratio of the energy required to produce the artificial draught (expressed in metres head or J/kg of flue gas) to the mechanical equivalent of extra heat carried away per kg of flue gases due to natural draught, is known as
A.	efficiency of the boiler
B.	efficiency of the chimney
C.	efficiency of the fan
D.	power of the boiler
Answer» C. efficiency of the fan

Discussion

72.	Cornish boilers are multi-tubular boilers.
A.	True
B.	False
Answer» C.

Discussion

Explore topic-wise MCQs in Mechanical Engineering.

A receiver type compound engine, requires a lighter flywheel.

In surface condensers, the condensate and the cooling water mixes up.

A water level indicator is a device to indicate the exact water level in the boiler at any instant.

A device used to empty the boiler whenever required and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler, is called blow off cock.

A __________ in a boiler is used to put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit.

The function of a superheater is to heat the feed water by utilising the heat in the exhaust flue gases before leaving through the chimney.

When the total heat of steam is kJ/kg and the sensible heat of feed water is kJ/kg, then the factor of evaporation is given by

The missing quantity is mainly due to cylinder condensation and a small amount of steam leakage past the valves and piston.

The amount of water evaporated or steam produced in kg per kg of fuel burnt is termed as evaporative capacity of a boiler.

In a compound steam engine, the temperature range per cylinder is reduced, with corresponding reduction in the condensation.

The ratio of heat actually used in producing the steam to the heat liberated in the furnace is known as equivalent evaporation from and at 100° C.

There is about 15 to 20% of coal saving when an economiser is used in a boiler.

The function of a D-slide valve is to exhaust steam from the cylinder at proper moment.

The mechanical draught produces more draught than natural draught.

The water tube boilers produce steam at a __________ pressure than that of fire tube boilers.

The mechanical draught __________ with the amount of smoke.

When the expansion of steam is carried out in a single cylinder and then exhausted into the atmosphere or a condenser, the engine is said to be a simple steam engine.

The motion of a D-slide valve in a steam engine is simple harmonic.

A single ended Scotch marine steam boiler may have one to four furnaces which enter from front end of the boiler.

Which of the following compound steam engine requires a smaller flywheel ?

The ratio of the energy required to produce the artificial draught (expressed in metres head or J/kg of flue gas) to the mechanical equivalent of extra heat carried away per kg of flue gases due to natural draught, is known as

Cornish boilers are multi-tubular boilers.