ic-engines-and-nuclear-power-plants mechanical-engineering question and answers -Page first

CuriousTab

CuriousTab

Home Aptitude

IC Engines and Nuclear Power Plants problems

1. The purpose of testing an internal combustion engine is
Options
A. to determine the information, which can not be obtained by calculations
B. to conform the data used in design, the validity of which may be doubtful
C. to satisfy the customer regarding the performance of the engine
D. all of the above

3. 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

4. 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

5. 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

6. 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

First 2 3 4 ... 12 .. 21 22 Last

More in Mechanical Engineering: