A four stroke cycle engine develops twice the power as that of a two stroke cycle engine
For the same power developed, a four stroke cycle engine is lighter, less bulky and occupies less floor area
The petrol engines are costly than diesel engines
All of the above
D. All of the above
0.2 kg
0.25 kg
0.3 kg
0.35 kg
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
It catches fire without external aid
Indicated by 90% distillation temperature i.e., when 90% of sample oil has distilled off
Higher maximum temperature
Qualitative governing
Quantitative governing
Hit and miss governing
Increase
Decrease
Remain same
Increase up to certain limit and then decrease
10 bar
100 bar
150 bar
500 bar
Increase
Reduce
Not effect
None of these
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
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
Fuel tank capacity
Lube oil capacity
Swept volume
Cylinder volume
Compression ratio for petrol engines varies from 6 to 10
Higher compression ratio in diesel engines results in higher pressures
Petrol engines work on Otto cycle
All of the above
1/2
1
2
4
Benzene
Iso-octane
Normal heptane
Alcohol
A fine fuel spray mixed with air is ignited by the heat of compression which is at a high pressure
The fuel supplied to the engine cylinder is mixed with necessary amount of air and the mixture in ignited with the help of a spark plug
The fuel is first evaporated after passing through a carburettor and is mixed with air before ignition
All of the above
Chemically correct air-fuel ratio by weight
Chemically correct air-fuel ratio by volume
Actual air-fuel ratio for maximum efficiency
None of the above
First a mild explosion followed by a bi explosion
First a big explosion followed by a mil explosion
Both mild and big explosions occurs simultaneously
Never occurs
Pre-ignition period
Delay period
Period of ignition
Burning period
6 : 1
9 : 1
12 : 1
15 : 1
Cetane number
Octane number
Calorific value
All of these
Not effected
Decrease
Increase
None of these
Highly ignitable
More difficult to ignite
Less difficult to ignite
None of these
Prevent sparking across the gap between the points
Cause more rapid break of the primary current, giving a higher voltage in the secondary circuit
Both (A) and (B)
None of the above
Low power will be produced
Efficiency will be low
Higher knocking will occur
Black smoke will be produced
0
50
100
120
More efficient
Less efficient
Equally efficient
Other factors will decide it
20 to 25
25 to 30
30 to 40
40 to 55
Increase
Decrease
Be independent
May increase or decrease depending on other factors
Homogeneous
Heterogeneous
Both (A) and (B)
Laminar
Starts at top dead centre and ends at bottom dead centre
Starts at 30° before top dead centre and ends at 50° before bottom dead centre
Starts at 30° after top dead centre and ends at 50° after bottom dead centre
May start and end anywhere
Low density
Low temperature
Long ignition delay
All of these
Fuel pump
Injector
Carburettor
None of these