Discussion
Home ‣ Mechanical Engineering ‣ IC Engines and Nuclear Power Plants Comments
- Question
A carburettor is used to supply
Options- A. petrol, air and lubricating oil
- B. air and diesel
- C. petrol and lubricating oil
- D. petrol and air
- Correct Answer
- petrol and air
- 1. In a four stroke cycle petrol engine, the inlet valve
Options- A. opens at top dead centre and closes at bottom dead centre
- B. opens at 20° before top dead centre and closes at 40° after bottom dead centre
- C. opens at 20° after top dead centre and closes at 20° before bottom dead centre id) may open or close anywhere Discuss
- 2. Pre-ignition is caused by the spontantaneous combustion of the mixture before the end of the compression stroke, and is due to
Options- A. cylinder walls being too hot
- B. overheated spark plug points
- C. red hot carbon deposits on cylinder walls
- D. any one of these Discuss
- 3. The compensating jet in a carburettor supplies almost constant amount of petrol at all speeds because the
Options- A. jet area is automatically varied depending on the suction
- B. the flow from the main jet is diverted to the compensating jet with increase in speed
- C. the diameter of the jet is constant and the discharge coefficient is invariant
- D. flow is produced due to the static head in the float chamber Discuss
- 4. Where reactor operation is designed with fast neutrons such as in reactors using highly enriched fuel, the moderator used is
Options- A. heavy water
- B. graphite
- C. carbon dioxide
- D. no moderator is needed Discuss
- 5. The thermal efficiency of a standard Otto cycle for a compression ratio of 5.5 will be
Options- A. 25%
- B. 50%
- C. 70%
- D. 100% Discuss
- 6. The nuclear power station at Tarapur has the reactor of the __________ type.
Options- A. pressurized water
- B. boiling water
- C. gas cooled
- D. liquid metal cooled Discuss
- 7. A diesel engine has
Options- A. one valve
- B. two valves
- C. three valves
- D. four valves Discuss
- 8. The pressure inside the cylinder is __________ the atmospheric pressure during the exhaust stroke.
Options- A. equal to
- B. below
- C. above Discuss
- 9. In open combustion chamber in diesel engines, the shape and layout of the piston crown, the inlet port and the valve produce the turbulent effect of fuel mixture.
Options- A. True
- B. False Discuss
- 10. Nuclear reactors are used
Options- A. to produce heat for thermoelectric power
- B. to produce fissionable material
- C. to propel ships, submarines, aircrafts
- D. all of these Discuss
IC Engines and Nuclear Power Plants problems
Search Results
Correct Answer: opens at 20° before top dead centre and closes at 40° after bottom dead centre
Correct Answer: any one of these
Correct Answer: flow is produced due to the static head in the float chamber
Correct Answer: no moderator is needed
Correct Answer: 50%
Correct Answer: boiling water
Correct Answer: three valves
Correct Answer: above
Correct Answer: True
Correct Answer: all of these
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