1. The shell of the Cochran boiler is made hemispherical ?

to give maximum space and strength

to withstand the pressure of steam inside the boiler

both (a) and (b)

none of the above

Answer: both (a) and (b)

Explanation:


2. Which of the following statement indicates the difference between Cornish boiler and Lancashire boiler ?

Cornish boiler is a water tube boiler whereas Lancashire boiler is a fire tube boiler

Cornish boiler is a fire tube boiler whereas Lancashire boiler is a water tube boiler

Cornish boiler has one flue tube whereas Lancashire boiler has two flue tubes

Cornish boiler has two flue tubes whereas Lancashire boiler has one flue tube

Answer: Cornish boiler has one flue tube whereas Lancashire boiler has two flue tubes

Explanation:


3. The cylinder condensation or missing quantity may be reduced by ?

the efficient steam jacketing of the cylinder walls

super heating the steam supplied to the engine cylinder

keeping the expansion ratio small in each cylinder

all of the above

Answer: all of the above

Explanation:


4. Which of the following statement is wrong ?

Locomotive boiler is a water tube boiler

Water tube boilers are internally fired

La-mont boiler is a low pressure water tube boiler

all of the above

Answer: all of the above

Explanation:


5. The diameter of superheated tubes in a locomotive boiler is ?

13 mm

31 mm

130mm

230 mm

Answer: 130mm

Explanation:


6. Which of the following statement is correct for a compound steam engines ?

The cost of the engine, for the same power and economy, is more than that of a simple steam engine

The forces in the working parts are increased as the forces are distributed over more parts

The ratio of expansion is reduced, thus reducing the length of stroke

The temperature range per cylinder is increased, with corresponding increase in condensation

Answer: The ratio of expansion is reduced, thus reducing the length of stroke

Explanation:


7. The artificial draught is produced by ?

steam jet

centrifugal fan

chimney

both (a) and (b)

Answer: both (a) and (b)

Explanation:


8. Which of the following are boiler accessories ?

economiser

superheater

both (a) and (b)

none of these

Answer: both (a) and (b)

Explanation:


9. The ratio of the actual vacuum to the ideal vacuum in a condenser is called ?

condenser efficiency

vacuum efficiency

nozzle efficiency

boiler efficiency

Answer: vacuum efficiency

Explanation:


10. The length of shell of a Locomotive boiler is ?

1m

2m

3m

4m

Answer: 4m

Explanation: