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- Question
The ratio of the temperature rise of cooling water to the vacuum temperature minus inlet cooling water temperature is called
Options- A. condenser efficiency
- B. vacuum efficiency
- C. nozzle efficiency
- D. boiler efficiency
- Correct Answer
- condenser efficiency
- 1. Clearance ratio is the ratio of
Options- A. clearance volume to the swept volume
- B. clearance volume to the volume at cut-off
- C. volume at cut-off to the swept volume
- D. swept volume to the clearance volume Discuss
- 2. For maximum discharge through a chimney, the condition is that height of hot gas column producing the draught should be
Options- A. one-half the height of chimney
- B. equal to the height of chimney
- C. two times the height of chimney
- D. four times the height of chimney Discuss
- 3. The efficiency of a boiler is defined as
Options- A. ratio of heat actually used in producing steam to the heat liberated in the furnace
- B. ratio of the mass of steam produced to the mass of total water supplied in a given time
- C. ratio of the heat liberated in the furnace to the heat actually Used in producing steam
- D. none of the above Discuss
- 4. The boiler efficiency is given by (where m = Total mass of water evaporated into steam in kg/h, mf = Mass of fuel in kg/h, C = Calorific valve of fuel in kJ/kg of fuel, h = Total heat of steam in kJ/kg, and hf1 = Sensible heat of feed water in kJ /kg)
Options- A.
- B.
- C.
- D.
Discuss
- 5. In a Woolf type compound engine, the high pressure and low pressure cylinders
Options- A. have common piston rod
- B. are set at 90°
- C. have separate piston rod
- D. are set in V - arrangement Discuss
- 6. A water level indicator is a device to indicate the exact water level in the boiler at any instant.
Options- A. True
- B. False Discuss
- 7. In a boiler, the heat is lost
Options- A. to dry flue gases
- B. in moisture present in the fuel
- C. to steam formed by combustion of hydrogen per kg of fuel
- D. all of the above Discuss
- 8. In a steam engine, superheated steam from the boiler is fed into the steam chest at a pressure of
Options- A. 10 atmospheres
- B. 20 atmospheres
- C. 30 atmospheres
- D. 40 atmospheres Discuss
- 9. The working pressure range for a La-Mont boiler is
Options- A. 0.5 to 10 MN/m2
- B. 1 to 15 MN/m2
- C. 2.5 to 15 MN/m2
- D. 3.5 to 20 MN/m2 Discuss
- 10. The function of a valve rod is
Options- A. to provide reciprocating motion to the slide valve
- B. to convert reciprocating motion of the piston into rotary motion of the crank
- C. to convert rotary motion of the crankshaft into to and fro motion of the valve rod
- D. to provide simple harmonic motion to the D-slide valve Discuss
Steam Boilers and Engines problems
Search Results
Correct Answer: clearance volume to the swept volume
Correct Answer: equal to the height of chimney
Correct Answer: ratio of heat actually used in producing steam to the heat liberated in the furnace
Correct Answer:
Correct Answer: have separate piston rod
Correct Answer: True
Correct Answer: all of the above
Correct Answer: 20 atmospheres
Correct Answer: 3.5 to 20 MN/m2
Correct Answer: to provide simple harmonic motion to the D-slide valve
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