Discussion
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- Question
The ratio of the energy required to produce the artificial draught (expressed in metres head or J/kg of flue gas) to the mechanical equivalent of extra heat carried away per kg of flue gases due to natural draught, is known as
Options- A. efficiency of the boiler
- B. efficiency of the chimney
- C. efficiency of the fan
- D. power of the boiler
- Correct Answer
- efficiency of the chimney
- 1. The draught in locomotive boilers is produced by a
Options- A. chimney
- B. centrifugal fan
- C. steam jet
- D. none of these Discuss
- 2. A valve installed between the boiler and the feed pump is
Options- A. blow off cock
- B. feed check valve
- C. steam stop valve
- D. none of these Discuss
- 3. A vessel into which the steam is exhausted and condensed after doing work in an engine cylinder or turbine is known as
Options- A. steam condenser
- B. steam boiler
- C. steam preheater
- D. economiser Discuss
- 4. In a steam condenser, the partial pressure of steam and air are 0.06 bar and 0.007 bar respectively. The condenser pressure is
Options- A. 0.007 bar
- B. 0.053 bar
- C. 0.06 bar
- D. 0.067 bar Discuss
- 5. The principal function of a stop valve is to
Options- A. control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required
- B. empty the boiler when required and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler
- C. put off fire in the furnace of the boiler when the level of water in the boiler falls to an unsafe limit
- D. increase the temperature of saturated steam without raising its pressure Discuss
- 6. Which of the following statement is correct?
Options- A. A horizontal steam engine requires less floor area than a vertical steam engine.
- B. The steam pressure in the cylinder is not allowed to fall below the atmospheric pressure.
- C. The compound steam engines are generally non-condensing steam engines.
- D. all of the above Discuss
- 7. A condenser maintains a low pressure (below atmospheric) so as to obtain the maximum possible energy from steam and thus to secure a high efficiency.
Options- A. Agree
- B. Disagree Discuss
- 8. The crown of the fire box is made hemispherical in order to resist intense heat in the fire box.
Options- A. True
- B. False Discuss
- 9. The indicated thermal efficiency is defined as the
Options- A. ratio of thermal efficiency to the Rankine efficiency
- B. ratio of brake power to the indicated power
- C. ratio of heat equivalent to indicated power to the energy supplied in steam
- D. product of thermal efficiency and Rankine efficiency Discuss
- 10. A device used to empty the boiler whenever required and to discharge the mud, scale or sediments which are accumulated at the bottom of the boiler, is called blow off cock.
Options- A. Yes
- B. No Discuss
Steam Boilers and Engines problems
Search Results
Correct Answer: steam jet
Correct Answer: feed check valve
Correct Answer: steam condenser
Correct Answer: 0.067 bar
Correct Answer: control the flow of steam from the boiler to the main pipe and to shut off the steam completely when required
Correct Answer: The steam pressure in the cylinder is not allowed to fall below the atmospheric pressure.
Correct Answer: Agree
Correct Answer: True
Correct Answer: ratio of heat equivalent to indicated power to the energy supplied in steam
Correct Answer: Yes
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