Question 81 : The diameter of flue tube in a Cornish boiler is __________ that of the shell.
1. one-third
2. three-fifth
3. one-fourth
4. two-fifth
View Answer   Discuss with Members

Question 82 : The function of a crosshead is to guide motion of the __________ and to prevent it from bending.
1. valve rod
2. piston rod
3. eccentric rod
4. connecting rod
View Answer   Discuss with Members

Question 83 : The length of shell of a Locomotive boiler is
1. 1m
2. 3m
3. 4m
4. 2m
View Answer   Discuss with Members

Question 84 : An air preheater is installed
1. before the superheater
2. before the economiser
3. none of these
4. between the economiser and chimney
View Answer   Discuss with Members

Question 85 : The draught produced by a steam jet issuing from a nozzle placed in the ashpit under the fire grate of the furnace is called
1. induced steam jet draught
2. chimney draught
3. none of these
4. forced steam jet draught
View Answer   Discuss with Members

Question 86 : Fire tube boilers are
1. internally fired
2. none of these
3. externally fired
4. internally as well as externally fired
View Answer   Discuss with Members

Question 87 : The natural draught is produced by
1. chimney
2. centrifugal fan
3. steam jet
4. none of these
View Answer   Discuss with Members

Question 88 : Which of the following statement is correct ?
1. A fire tube boiler occupies less space than a water tube boiler, for a given power.
2. A simple vertical boiler has one fire tube.
3. Steam at a high pressure and in large quantities can be produced with a simple vertical boiler.
4. all of the above
View Answer   Discuss with Members

Question 89 : Which of the following statement is wrong ?
1. Water tube boilers are internally fired.
2. Locomotive boiler is a water tube boiler.
3. all of the above
4. La-mont boiler is a low pressure water tube boiler.
View Answer   Discuss with Members

Question 90 : In water tube boilers
1. none of these
2. forced circulation takes place
3. water passes through the tubes which are surrounded by flames and hot gases
4. the flames and hot gases pass through the tubes which are surrounded by water
View Answer   Discuss with Members