In case of a Diesel car, the pressure at the end of compression is of the order of
15 bar
25 bar
35 bar
45 bar
Correct Answer :
D. 45 bar
Related Questions
The process of removing the burnt gases from the engine cylinder by the fresh charge coming into the engine cylinder from the crankcase, is known as
Cleaning
Priming
Scavenging
Detonation
The seat belt tensioners are built in the
Front seats
Shoulder anchors
Seat belt retractors
Seat belt buckles
The function of a proportioning control valve (PCV) in a brake system is to
Ensure that equal pressure is supplied to the front and rear brakes throughout every braking operation
Reduce the brake fluid pressure when the brakes approach their lockup point
Cause less brake fluid pressure to act on the front brakes than on the rear brakes when the fluid pressure exceeds a predetermined level
Cause less brake fluid pressure to act on the rear brakes than on the front brakes when the fluid pressure exceeds a predetermined level.
The petrol engines are also known as
Spark ignition (S.I.) engines
Compression ignition (C.I.) engines
Steam engines
None of these
The formula for Isooctane is
C8H18
C7H17
C6H18
C7H18
A four cylinder engine has a capacity of 2.4 litres. The swept volume of one cylinder is
400 cm³
600 cm³
1200 cm³
2400 cm³
Damper is also known as
Shock absorber
Torsion bar
Spring
Radius rod
The indicated power of a four stroke engine (in watts) is equal to (where P = Mean effective pressure in N/m², L = Length of stroke in metres, A = Cross-sectional area of the piston in m², and N = Speed of the engine in revolutions per second (r.p.s)
P.L.A.N/2
P.L.A.N
2 × P.L.A.N
P.L.A.N/4
The commonly used antifreeze solution in automobiles is
Carbon disulphide
Ethylene glycol
Ammonium chloride
Freon-12
The material generally used for cylinder sleeves is
Aluminium
Ceramic
Cast iron
Fibre reinforced plastic
The cetane rating of Diesel fuel is in the order of
25
45
70
90
The lubrication oil flow in an engine is in the order as
Oil strainer, oil pump, relief valve, oil filter, cylinder block, cylinder head and oil pan
Oil pump, oil strainer, relief valve, oil filter, cylinder block, cylinder head and oil pan
Oil strainer, oil filter, relief valve, oil pump, cylinder block, cylinder head and oil pan
Oil strainer, oil pump, relief valve, oil filter, cylinder head, cylinder block and oil pan
Instead of valves, the ports are used in case of
Four stroke I.C. engines
Two stroke I.C. engines
V6 engines
None of these
The frequency of flashing of light per minute in a direction (side turn) indicator is about
9
90
900
9000
The ease with which petrol vaporizes is called its
Oxidation
Octane number
Volatility
Cetane number
The self ignition temperature of Diesel as compared to petrol is
Higher
Lower
Same
Depends on fuel quality
The information provided by the oxygen (O₂) sensor to the feedback control system is about the
Air-fuel ratio
Air temperature
Air flow speed
Exhaust gas volume
The condition that results in large quantities of HC emission is
High temperature combustion
Incomplete combustion
Low temperature combustion
High atmospheric temperature combustion
In a four stroke engine for each crankshaft revolution, the camshaft revolves
One half turn
One turn
Two turns
Four turns
Which of the following symptom is caused as a result of brake disc run out?
Ineffectiveness of the brakes
Judder during braking
Localized wearing of the brake pads
Rapid wearing of the brake pads
The ignition coil is used to
Step up current
Step down current
Step up voltage
Step down voltage
The motion of the cam is transferred to the valves through
Pistons
Rocker arms
Camshaft pulley
Valve stems
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
The minimum parking brake force is generally ________ of gross vehicle mass (GVM).
5 %
10 %
15 %
20 %
The included angle is the sum of the
Camber and castor
Castor and S.A.I.
Camber and S.A.I.
Camber and toe in
The sequence in which the force is transmitted through a brake system when the brake pedal is depressed is
Brake pedal, master cylinder, brake lines, vacuum servo mechanism, brake pads
Brake pedal, vacuum servo mechanism, master cylinder, brake lines, brake pads
Brake pedal, master cylinder, vacuum servo mechanism, brake lines, brake pads
Brake pedal, brake lines, vacuum servo mechanism, master cylinder, brake pads
The capacity of a battery is usually expressed in terms of
Volts
Amperes
Weight
Ampere hours
The basic purpose of tyre rotation on automobiles is to
Avoid ply separation
Equalize wear
Get better ride
None of these
What type of bearing is used for main bearings and connecting rod bearings?
Ball bearings
Plain bearings
Needle roller bearing
Taper roller bearing
The rolling resistance is because of the friction between the
Wheel rim and tyre
Tyre and the road surface
Wheel rim and road surface
None of these