In Diesel engines, the duration between the time of injection and the time of ignition is called
Spill cut-off
Delay period
Injection period
Ignition period
Correct Answer :
B. Delay period
Related Questions
The coefficient of rolling resistance for a truck weighing 63,500 N is 0.018. The rolling resistance to the truck is
1.143 N
11.43 N
114.3 N
1143 N
The main function of the brake fluid is
Lubrication
Power transmission
Cooling
None of these
The Diesel engines as compared to petrol engines require
Bigger flywheel
Smaller flywheel
Same size of flywheel
No flywheel
The starter motor is driven by
Chain drive
Gear drive
Flat belt drive
V-belt drive
In vehicles with tilt steering, the steering column is pivoted in
Upper bracket
Lower bracket
Tilt bracket
Steering yoke joint
The condition that causes vapour locking in a brake system is
Overheating of the fluid due to frequent brake application
Overcooling of the brakes during high speed driving
Keeping the vehicle without use for an extended period
An excessively high engine speed on a downhill road
Free pedal play in car clutches is about
15 mm
25 mm
40mm
60 mm
The device for smoothening out the power impulses from the engine is called
Clutch
Differential
Flywheel
Torque converter
The firing order for an opposed four cylinder l.C. engine is
1-2-3-4
1-3-4-2
1-4-3-2
1-3-2-4
The firing order for an inline four cylinder I.C. engine is
1-2-3-4
1-3-4-2
1-2-4-3
1-3-2-4
The advantage of having a tandem master cylinder arrangement in automobiles is that it
Enhances safety by serving two independent lines in a divided line brake circuit
Enhances safety by activating the brakes using vacuum pressure in the event of brake fluid loss
Supplies equal fluid pressure to each line of a divided line brake circuit, thereby preventing the brakes from dragging on one side
Boosts the brake fluid pressure to reduce the force required to depress the brake pedal
In automobiles G.V.W. refers to
Gross vehicle width
Gross vehicle weight
Gross vehicle wheel base
Gross vehicle wheel track
The compression ratio for Diesel engines usually lies in the range of
6-10
10-1
15-25
25-40
Caster is a
Forward tilt of the kingpin
Backward tilt of the kingpin
Either 'A' or 'B'
None of these
The correct flow of power through the drive train is
Engine drive shafts, clutch, main shaft, counter shaft, final driven gear, wheels
Engine clutch, main shaft, counter shaft, final driven gear, drive shafts, wheels
Engine clutch, counter shaft, main shaft, final driven gear, drive shafts, wheels
Engine main shaft, counter shaft, clutch, final driven gear, drive shafts, wheels
The service brakes employed in cars are generally operated
Mechanically
Hydraulically
Pneumatically
None of these
In order to implement gear changes in the gear unit of an automatic transmission, a ________ is used.
Synchronizer
Planetary gear
Magnetic clutch
Hydraulic multi plate clutch
Damper in an automobile is used to
Absorb the energy
Dissipate the energy
Release the energy
Increase the energy
The most effective method of controlling S.I. engine exhaust emission is by
Recirculating exhaust
Using catalytic converter
Using some additives in the fuel
None of these
The combustion process in a Diesel engine is a
Constant volume process
Constant pressure process
Constant temperature process
Adiabatic process
A heat treated glass generally used in automobiles bursts into ________ upon cracking,
Sharp edged fragments
Small particles
Large particles
None of these
An oil filter bypass valve opens when the
Engine is cold
Engine overheats
Oil filter becomes clogged
Engine runs at high speed
If the engine coolant leaks into the engine oil, then engine oil
Appears milky
Become foamy
Turns black
None of these
The battery is an electrochemical device, which means battery
Makes chemicals by mechanical means
Uses chemical action to provide electricity
Has curved plates instead of flat plates
Does not use an electrolyte
The commonly used antifreeze solution in automobiles is
Carbon disulphide
Ethylene glycol
Ammonium chloride
Freon-12
In a single dry plate clutch, torsional vibrations are absorbed by
Coil springs known as torsional springs
Cushion springs
Central hub
Clutch pedal
In a four stroke engine for each crankshaft revolution, the camshaft revolves
One half turn
One turn
Two turns
Four turns
The purpose of adding pigment to the paint is that it
Optimises the viscosity of paint
Makes paint film hard
Gives colour and filling up effect to the paint
None of the above
The condition that results in large quantities of CO emission is
Insufficient air during combustion
Insufficient fuel during combustion
Low temperature combustion
High temperature combustion
When a gear box has four forward speeds and one reverse speed, it is said to be a
3-speed gear box
4-speed gear box
5-speed gear box
6-speed gear box