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- Question
Which of the following statement is wrong?
Options- A. Locomotive boiler is a water tube boiler.
- B. Water tube boilers are internally fired.
- C. La-mont boiler is a low pressure water tube boiler.
- D. all of the above
- Correct Answer
- all of the above
- 1. In water tube boilers
Options- A. water passes through the tubes which are surrounded by flames and hot gases
- B. the flames and hot gases pass through the tubes which are surrounded by water
- C. forced circulation takes place
- D. none of these Discuss
- 2. In a boiler, feed water supplied per hour is 205 kg while coal fired per hour is 23 kg. The net enthalpy rise per kg of water is 145 kJ. If the calorific valve of the coal is 2050 kJ/kg, then the boiler efficiency will be
Options- A. 56%
- B. 63%
- C. 74%
- D. 78% Discuss
- 3. Which of the following statement is correct for a compound steam engine?
Options- A. The cost of the engine, for the same power and economy, is more than that of a simple steam engine.
- B. The forces in the working parts are increased as the forces are distributed over more parts.
- C. The ratio of expansion is reduced, thus reducing the length of stroke.
- D. The temperature range per cylinder is increased, with corresponding increase in condensation. Discuss
- 4. Which of the following statement is wrong?
Options- A. The factor of evaporation for all boilers is always greater than unity.
- B. The amount of water evaporated in kg per kg of fuel burnt is called equivalent evaporation from and at 100° C.
- C. The ratio of heat actually used in producing the steam to the heat liberated in the furnace is called boiler efficiency.
- D. none of the above Discuss
- 5. The function of a safety valve is
Options- A. to blow off steam when the pressure of steam inside the boiler exceeds the working pressure
- B. to indicate the water level inside the boiler to an observer
- C. to measure pressure of steam inside the steam boiler
- D. none of the above Discuss
- 6. Fire tube boilers are
Options- A. internally fired
- B. externally fired
- C. internally as well as externally fired
- D. none of these Discuss
- 7. The shell diameter of a Locomotive boiler is
Options- A. 1 m
- B. 1.5 m
- C. 2 m
- D. 2.5 m Discuss
- 8. The fire tubes in a Scotch marine boiler are
Options- A. horizontal
- B. vertical
- C. inclined Discuss
- 9. The object of producing draught in a boiler is
Options- A. to provide an adequate supply of air for the fuel combustion
- B. to exhaust the gases of combustion from the combustion chamber
- C. to discharge the gases of combustion to the atmosphere through the chimney
- D. all of the above Discuss
- 10. Which of the following statement is correct?
Options- A. A fire tube boiler occupies less space than a water tube boiler, for a given power.
- B. Steam at a high pressure and in large quantities can be produced with a simple vertical boiler.
- C. A simple vertical boiler has one fire tube.
- D. all of the above Discuss
Steam Boilers and Engines problems
Search Results
Correct Answer: water passes through the tubes which are surrounded by flames and hot gases
Correct Answer: 63%
Correct Answer: The ratio of expansion is reduced, thus reducing the length of stroke.
Correct Answer: none of the above
Correct Answer: to blow off steam when the pressure of steam inside the boiler exceeds the working pressure
Correct Answer: internally fired
Correct Answer: 1.5 m
Correct Answer: horizontal
Correct Answer: all of the above
Correct Answer: A simple vertical boiler has one fire tube.
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