Vaporisation
Carburetion
Ionisation
Atomisation
D. Atomisation
B.P = (Wl × 2πN)/60 watts
B.P = [(W - S) πDN]/60 watts
B.P = [(W - S) π (D + d) N]/60 watts
All of these
Compression starts at 35° after bottom dead center and ends at top dead center
Compression starts at bottom dead center and ends at top dead center
Compression starts at 10° before bottom dead center and, ends just before top dead center
May start and end anywhere
Fuel injection starts at 10° before to dead center and ends at 20° after tor dead center
Fuel injection starts at top dead center and ends at 20° after top dead center
Fuel injection starts at just before top dead center and ends just after top dead center
May start and end anywhere
Air alone
Air and fuel
Air and lub oil
Fuel alone
Half the operating speed
One fourth of operating speed
250 - 300 rpm
60 - 80 rpm
Increase
Reduce
Not effect
None of these
Low heat value of oil
High heat value of oil
Net calorific value of oil
Calorific value of fuel
Instantaneous and rapid burning of the first part of the charge
Instantaneous auto ignition of last part of charge
Delayed burning of the first part of the charge
Reduction of delay period
Flat
Contoured
Slanted
Depressed
Mechanical efficiency
Overall efficiency
Indicated thermal efficiency
Volumetric efficiency
To distribute spark
To distribute power
To distribute current
To time the spark
Increase linearly
Decrease linearly
Increase parabolically
Decrease parabolically
Morse test
Prony brake test
Motoring test
Heat balance test
6 : 1
9 : 1
12 : 1
15 : 1
Diesel
Kerosene
Fuel oil
Gasoline
Petrol, air and lubricating oil
Air and diesel
Petrol and lubricating oil
Petrol and air
Increase
Decrease
Remain same
None of these
Peak pressure
Rate of rise of pressure
Rate of rise of temperature
Peak temperature
Requires smaller foundation
Is lighter
Consumes less lubricating oil
All of these
Not effect
Decrease
Increase
None of these
Enhance flow rate
Control air flow
Induce primary swirl
Induce secondary turbulence
Exhaust will be smoky
Piston rings would stick into piston grooves
Engine starts overheating
Scavenging occurs
Pre-ignition
Increase in detonation
Acceleration in the rate of combustion
Any one of these
0.001 second
0.002 second
0.003 second
0.004 second
Is lighter
Wear is less
Absorbs shocks
Is stronger
Calorific value of oil
Low heat value of oil
High heat value of oil
Mean heat value of oil
2-stroke cycle engines
4-stroke cycle engines
Aeroplane engines
High efficiency engines
Speed
Temperature
Volume of cylinder
m.e.p. and I.H.P.
Not effected
Decrease
Increase
None of these
Fuel pump
Governor
Injector
Carburettor