Steam Boilers Engines Nozzles and Turbines

1. Which of the following boilers is best suited to meet fluctuating demands

1. babcock and wilcox
2. locomotive
3. lancashire
4. cochran
5. comish.

View answer

2. 02 content in atmospheric air on volume basis is

1. 21%
2. 23%
3. 30%
4. 40%
5. 70%.

View answer

3. 02 content in atmospheric air on weight basis is

1. 21%
2. 23%
3. 30%
4. 40%
5. 70%.

View answer

4. 1 kg.m is equal to

1. 9.81 Joules
2. All Joules
3. 427 Joules
4. 102 Joules
5. 539 Joules.

View answer

5. 100% efficiency of a thermal cycle cannot be achieved because of

1. frictional losses
2. it is not possible to achieve 0°K temperature
3. leakage
4. non-availability of ideal substance
5. none of the above.

View answer

6. A boiler in India should conform to safety regulations of

1. DIN
2. BS
3. ASTM
4. IBR
5. GOST.

View answer

7. A fusible plug is fitted in small boilers in order to

1. avoid excessive build up of pressure
2. avoid explosion
3. extinguish fire if water level in the boiler falls below alarming limit
4. control steam dome
5. remove molten aslj.

View answer

8. A packaged boiler is one in which various parts like firing equipment, fans, feed pumps and automatic controls are

1. supplied by same manufacturer loose and assembled at site
2. supplied mounted on a single base
3. purchased from several parties and packed together at site
4. packaged boiler does not exist
5. none of the above.

View answer

9. A safety valve in a locomotive starts leaking. The leaking medium will be

1. water
2. dry steam
3. wet steam
4. super heated steam
5. supersaturated steam.

View answer

10. A supercritical boiler is one that operates above the pressure and temperature of following values

1. 100 kg/cm2 and 540°C
2. 1 kg/cm2 and 100°C
3. 218 kg/cm2 abs and 373°C
4. 218 kg/cm2 abs and 540°C
5. 100 kg/cm2 abs and 373°C

View answer