Basic Mechanical Engineering (3110006) MCQs

MCQs of Steam Boilers

Showing 51 to 60 out of 65 Questions
51.
Which of the following is the boiler accessory?
(a) Pressure gauge
(b) Safety valve
(c) Fusible plug
(d) None of these
Answer:

Option (d)

52.
Which of the following is used to heat the feedwater by using waste heat of flue gases?
(a) Air preheater
(b) Superheater
(c) Economizer
(d) Steam separator
Answer:

Option (c)

53.
An economiser __________ the steam raising capacity of a boiler.
(a) increases
(b) decreases
(c) has no effect on
(d) none of the above
Answer:

Option (a)

54.
The correct location of economizer is
(a) between the furnace and air preheater
(b) between air preheater and chimney
(c) between forced draft fan and furnace
(d) near the superheater
Answer:

Option (a)

55.
An economizer is installed in a boiler primarily to
(a) superheat the steam
(b) reduce fuel consumption
(c) increase steam pressure
(d) all of these
Answer:

Option (b)

56.
__________ is generally placed after the economizer.
(a) Air preheater
(b) Superheater
(c) Evaporator
(d) None of the above
Answer:

Option (a)

57.
An air preheater is installed
(a) before the economizer
(b) before the superheater
(c) between the economizer and chimney
(d) none of these
Answer:

Option (c)

58.
A device used to increase the temperature of saturated steam without raising its pressure is called
(a) blow off cock
(b) fusible plug
(c) superheater
(d) stop valve
Answer:

Option (c)

59.
A device in which some portion of waste heat of flue gases is recovered to heat the air before it passes to the furnace for combustion purpose is known as
(a) superheater
(b) air preheater
(c) economizer
(d) injector
Answer:

Option (b)

60.
Which one is the water tube boiler?
(a) Cochran boiler
(b) Lancashire boiler
(c) Babcock Wilcox boiler
(d) None of the above
Answer:

Option (c)

Showing 51 to 60 out of 65 Questions