Steam Boilers and Engines problems
- 1. When the circulation of water, in a boiler, is by convection currents which are set up during the heating of water, then the boiler is known as
Options- A. internally fired boiler
- B. externally fired boiler
- C. natural circulation boiler
- D. forced circulation boiler Discuss
Correct Answer: natural circulation boiler
- 2. The amount of water evaporated from feed water at __________ into dry and saturated steam at 100° C at normal atmospheric pressure is called equivalent evaporation from and at 100° C.
Options- A. 0°C
- B. 40°C
- C. 60°C
- D. 100°C Discuss
Correct Answer: 100°C
- 3. Which of the following statement is wrong?
Options- A. The mechanical draught reduces the height of chimney.
- B. The natural draught reduces the fuel consumption.
- C. A balanced draught is a combination of induced and forced draught.
- D. all of the above Discuss
Correct Answer: The natural draught reduces the fuel consumption.
- 4. The number of water level indicators in a boiler are generally __________ in number.
Options- A. one
- B. two
- C. three
- D. four Discuss
Correct Answer: two
- 5. In a La-mont boiler, there is a __________ circulation of water and steam.
Options- A. forced
- B. natural Discuss
Correct Answer: forced
- 6. All steam engines work on
Options- A. Zeroth law of thermodynamics
- B. First law of thermodynamics
- C. Second law of thermodynamics
- D. none of these Discuss
Correct Answer: Second law of thermodynamics
- 7. The factor of evaporation for all boilers is always
Options- A. equal to unity
- B. less than unity
- C. greater than unity Discuss
Correct Answer: greater than unity
- 8. A device used to heat feed water by utilising the heat in me exhaust flue gases before leaving through the chimny, is known as
Options- A. economiser
- B. fusible plug
- C. superheater
- D. stop valve Discuss
Correct Answer: economiser
- 9. Combustuion of fuel takes place __________ the engine cylinder of a steam engine.
Options- A. outside
- B. inside Discuss
Correct Answer: outside
- 10. The pressure of feed water has to be raised before its entry into the boiler. The pressure is raised by a device known as
Options- A. feedpump
- B. injector
- C. feed check valve
- D. pressure gauge Discuss
Correct Answer: feedpump
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