The thermal efficiency of a diesel engine is of the order of_________________?
A. 92%
B. 68%
C. 52%
D. 34%
E. 25%.
I.C. Engines
The ignition coil in diesel engines produces voltage of the order of________________?
The ignition coil in diesel engines produces voltage of the order of________________?
A. 6 to 12 volts
B. 240 volts
C. 1000 volts
D. 20,000 volts
E. 80,000 volts
In petrol engines, advancing the spark timing will_______________?
In petrol engines, advancing the spark timing will_______________?
A. increase the knocking tendency
B. decrease the knocking tendency
C. not affect the knocking tendncy
D. increase or decrease knocking tendency depending on strenght and time of spark
E. unpredictable
The essential equipment for producing high vlotage for sparking in petrol engines with battery is_______________?
The essential equipment for producing high vlotage for sparking in petrol engines with battery is_______________?
A. ignition coil
B. ignition coil and distributor
C. ignition coil and condenser
D. ignition coil and contact breaker
E. ignition coil, contact breaker and con-denser
For low speed operation or for idling in petrol engines, the engine requirements are for_______________?
For low speed operation or for idling in petrol engines, the engine requirements are for_______________?
A. lean mixture
B. theoretically correct mixture
C. rich mixture
D. any type of mixture
E. lean/rich mixture depending upon capacity of engine
Power impulses from an I.C. engine are somoothed out by__________________?
Power impulses from an I.C. engine are somoothed out by__________________?
A. governor
B. crank shaft
C. gear box
D. flywheel
E. timing spark properly
In carburettors, the top of the fuel jet with reference to the level in the float chamber is kept at_________________?
In carburettors, the top of the fuel jet with reference to the level in the float chamber is kept at_________________?
A. same level
B. slightly higher level
C. slightly lower level
D. may be anywhere
E. varies from situation to situation
In petrol engines, the maximum power is developed corresponding to relative fuel air ratio of________________?
In petrol engines, the maximum power is developed corresponding to relative fuel air ratio of________________?
A. 0.85
B. 1
C. 1.1 to 1.3
D. 1.2 to 1.5
In petrol engine, increase of cooling water temperature will_________________?
In petrol engine, increase of cooling water temperature will_________________?
A. increase the knocking tendency
B. decrease the knocking tendecny
C. not affect the knocking tendency
D. increase or decrease knocking tendency depedning on strength and time of spark
E. unpredictable
The pour point of diesel oil must be_________________?
The pour point of diesel oil must be_________________?
A. lower than the coldest atmospheric temperature at which oil is to be pumped
B. higher than above
C. has no such relation
D. more than 100°C
E. none of the above