Discussion
Home ‣ Mechanical Engineering ‣ Steam Boilers and Engines See What Others Are Saying!
- Question
In natural circulation steam boilers, the circulation of water is by convection currents which are set up during the heating of water.
Options- A. Correct
- B. Incorrect
- Correct Answer
- Correct
- 1. The reflectivity depends upon
Options- A. geometry of the reflector
- B. energy of neutrons
- C. properties of the reflector
- D. all of these Discuss
- 2. Thermal conductivity of air increases with rise in temperature.
Options- A. Correct
- B. Incorrect Discuss
- 3. A draft tube is used with impulse turbines.
Options- A. Yes
- B. No Discuss
- 4. Pearlite is a combination of 87% ferrite and 13% cementite.
Options- A. Yes
- B. No Discuss
- 5. For maximum discharge through a chimney, the temperature of flue gases inside the chimney should the slightly more than the atmospheric temperature.
Options- A. Correct
- B. Incorrect Discuss
- 6. Which of the following statement is incorrect?
Options- A. A force acting in the opposite direction to the motion of the body is called force of friction.
- B. The ratio of the limiting friction to the normal reaction is called coefficient of friction.
- C. A machine whose efficiency is 100% is known as an ideal machine.
- D. The velocity ratio of a machine is the ratio of load lifted to the effort applied. Discuss
- 7. The ratio of the volume of free air delivery per stroke to the swept volume of the piston, is known as
Options- A. compressor efficiency
- B. volumetric efficiency
- C. isothermal efficiency
- D. mechanical efficiency Discuss
- 8. In a Diesel engine, the function of a fuel injector is to
Options- A. mix the fuel and air
- B. ignite the air-fuel mixture
- C. provide flame front for ignition
- D. spray atomized fuel in the cylinder Discuss
- 9. A battery can be charged by
Options- A. adding distilled water
- B. adding sulphuric acid
- C. applying voltage in the reverse direction to that of charging
- D. applying a voltage in the same direction to that of charging Discuss
- 10. The efficiency of a Pelton wheel working under constant head __________ with the increase in power.
Options- A. remains same
- B. increases
- C. decreases Discuss
More questions
Correct Answer: all of these
Correct Answer: Correct
Correct Answer: No
Correct Answer: Yes
Correct Answer: Correct
Correct Answer: The velocity ratio of a machine is the ratio of load lifted to the effort applied.
Correct Answer: volumetric efficiency
Correct Answer: spray atomized fuel in the cylinder
Correct Answer: applying voltage in the reverse direction to that of charging
Correct Answer: increases
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