Water Tube Boilers MCQ Questions & Answers

Question 1

Babcock and Wilcox boiler is a forced circulation boiler.

A. TRUE
B. FALSE

Question 2

For a Babcock and Wilcox boiler, what is the correct range of size of the water tubes?

A. 1.22 to 1.44 cm
B. 4.98 to 6.02 cm
C. 7.62 to 10.16 cm
D. 12.25 to 15.54 cm

Question 3

In Babcock and Wilcox boiler, just before entering the superheater the steam enters _____

A. uptake header
B. down take header
C. main stop valve
D. antipriming pipe

Question 4

Stirling boiler is _____

A. a fire tube boiler
B. a bent-tube (water tube) boiler
C. a horizontal straight tube (water tube) boiler
D. a high pressure boiler

Question 5

Water tube boilers are further classified into horizontal straight tube and bent tube boilers.

A. TRUE
B. FALSE

Question 6

What is maximum working pressure of Babcock and Wilcox boiler?

A. 40 bar
B. 50 bar
C. 60 bar
D. 80 bar

Question 7

What is the correct range of diameter of the drum for a Babcock and Wilcox boiler?

A. 0.61 – 1.02 m
B. 1.22 – 1.83 m
C. 2.87 – 3.52 m
D. 4.89 – 5.66 m

Question 8

What is the correct range of size of superheater tubes in Babcock and Wilcox boiler?

A. 1.20 to 2.10 cm
B. 2.12 to 2.84 cm
C. 3.84 to 5.71 cm
D. 5.84 to 6.25 cm

Question 9

What is the maximum steam capacity of a Babcock and Wilcox boiler?

A. 20000 kg/hr
B. 30000 kg/hr
C. 40000 kg/hr
D. 50000 kg/hr

Question 10

What purpose do baffle plates serve in a Babcock and Wilcox boiler?

A. They direct the flow of water
B. They direct the flow of steam
C. They direct the flow of hot gases
D. They direct the flow of air to combustion chamber

Question 11

Which of the following is a horizontal straight tube boiler?

A. Lancashire boiler
B. Babcock and Wilcox boiler
C. Stirling boiler
D. Locomotive boiler

Question 12

Which of the following statements is FALSE for a cross drum Babcock and Wilcox boiler?

A. The alignment of boiler drum is different in cross drum and longitudinal drum boilers
B. Any number of connecting tubes can be used
C. Steam of pressure 100 bar could be generated
D. Steam capacity is 45000 kg/hr

Question 13

An air preheater is installed ___________

A. between the economiser and chimney
B. before the superheater
C. before the economiser
D. none of the mentioned

Question 14

In a glass rube type water indicator for a boiler, one end of the tube is connected to water space and the other end is connected to ________________

A. chimney
B. water space
C. steam space
D. super heater

Question 15

The draught produced by a steam jet issuing from a nozzle placed in the ashpit under the fire grate of the furnace is called ___________

A. chimney draught
B. induced steam jet draught
C. forced steam jet draught
D. none of the mentioned

Question 16

The natural draught is produced by ___________

A. chimney
B. centrifugal fan
C. steam jet
D. none of the mentioned

Question 17

The shell diameter of a Locomotive boiler is?

A. 1.5m
B. 1m
C. 2m
D. 2.5m

Question 18

What is the function of a flywheel?

A. to convert reciprocating motion of the piston into rotary motion
B. to prevent fluctuation of speed
C. to keep the engine speed uniform at all load conditions
D. to convert rotary motion of the crankshaft into to and fro motion of the valve rod

Question 19

What is the length of shell of a Locomotive boiler?

A. 2m
B. 3m
C. 4m
D. 6m

Question 20

Which of the following statement is correct for a compound steam engine?

A. The forces in the working parts are increased as the forces are distributed over more parts
B. The cost of the engine, for the same power and economy, is more than that of a simple steam engine
C. The temperature range per cylinder is increased, with corresponding increase in condensation
D. The ratio of expansion is reduced, thus reducing the length of stroke

Question 21

Willian’s line for the steam engine is a straight line relationship between the steam consumption per hour and ___________

A. brake power
B. indicated power
C. pressure of steam
D. efficiency