Higher
Lower
Remain unaffected
None of the above
Opens at 20° before top dead centre and closes at 40° after bottom dead centre
Opens at 20° after top dead centre and closes at 20° before bottom dead centre
Opens at top dead centre and closes at bottom dead centre
May open and close anywhere
High heat value
Low heat value
Net calorific value
Calorific value
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
To determine the information, which cannot be obtained by calculations
To conform the data used in design, the validity of which may be doubtful
To satisfy the customer regarding the performance of the engine
All of the above
Carburettor
Injector
Governor
None of these
Single cylinder petrol engine
Four stroke engine
Single cylinder diesel engine
Multi cylinder engine
30° before top dead centre
30° after top dead centre
30° before bottom dead centre
30° after bottom dead centre
40% cetane and 60% alpha methyl naphthalene
40% alpha methyl naphthalene and 60% cetane
40% petrol and 60% diesel
40% diesel and 60% petrol
Otto cycle
Diesel cycle
Dual cycle
Carnot cycle
Naturally aspirated
Supercharged
Centrifugal pump
Turbo charger
1 sec
0.1 sec
0.01 sec
0.001 sec
Cetane and iso-octane
Cetane and alpha-methyl naphthalene
Cetane and normal heptane
Cetane and tetra ethyl lead
Same
Less
More
Variable
Peak pressure
Rate of rise of pressure
Rate of rise of temperature
Peak temperature
Half the operating speed
One fourth of operating speed
250 - 300 rpm
60 - 80 rpm
A supercharger
A centrifugal blower
A vacuum chamber
An injection tube
Napthene
Tetra ethyl lead
Amyl nitrate
Hexadecane
Paraffin, aromatic, napthene
Paraffin, napthene, aromatic
Napthene, aromatics, paraffin
Napthene, paraffin, aromatic
30 to 40 %
40 to 60 %
60 to 70 %
75 to 90 %
1 m3
5 m3
56 m3
910 m3
0
50
100
120
Starts at 15° before top dead centre and ends at 30° after top dead centre
Starts at top dead centre and ends at 30° after top dead centre
Starts at 15° after top dead centre and ends at 30° before bottom dead centre
May start and end anywhere
Starts at 40° after bottom dead centre and ends at 10° before top dead centre
Starts at 40° before top dead centre and ends at 40° after top dead centre
Starts at top dead centre and ends at 40° before bottom dead centre
May start and end anywhere
10 bar
20 bar
25 bar
35 bar
Air used for combustion sent under pressure
Forced air for cooling cylinder
Burnt air containing products of combustion
Air used for forcing burnt gases out of engine's cylinder during the exhaust period
Supercharging
Carburetion
Turbulence
Delay period
Fuel pump
Governor
Injector
Carburettor
Minimum temperature to which oil is heated in order to give off inflammable vapours in sufficient quantity to ignite momentarily when brought in contact with a flame
Temperature at which it solidifies or congeals
Temperature at which it catches fire without external aid
Indicated by 90% distillation temperature, i.e. when 90% of sample oil has distilled off
Mechanical efficiency
Overall efficiency
Volumetric efficiency
Relative efficiency