The most accurate ignition system of a spark ignition engine is
Magneto system
Battery system
Electronic control unit system
Magneto and electronic system
Correct Answer :
C. Electronic control unit system
Related Questions
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
Tachometer in a vehicle measures
Speed
Distance
Engine r.p.m.
Fuel consumption
The tilting of the front wheels away from the vertical, when viewed from the front of the car, is called
Camber
Caster
Toe in
Toe out
During braking, the brake shoe is moved outward to force the lining against the
Wheel piston or cylinder
Anchor pin
Brake drum
Wheel rim or axle
The cetane rating of Diesel fuel is in the order of
25
45
70
90
The boiling point of Diesel fuel is in the range of
70°C to 100°C
100°C to 120°C
120°C to 180°C
180°C to 360 °C
The parking brake generally acts on
Front wheels
Rear wheels
Front and rear wheels
Propeller shaft
If clearance volume of I.C. engines is increased, the compression ratio will
Increase
Decrease
Remain constant
Be doubled
Damper is also known as
Shock absorber
Torsion bar
Spring
Radius rod
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
The petrol engines are also known as
Spark ignition (S.I.) engines
Compression ignition (C.I.) engines
Steam engines
None of these
The tyre rotation is generally done at
1000 km
4000 km
6000 km
10000 km
A maintenance free battery
Has lead-antimony plate grid
Has lead-calcium plate grid
Does not contain acid
Does not contain water
The self ignition temperature of Diesel as compared to petrol is
Higher
Lower
Same
Depends on fuel quality
The connecting rod is attached to the piston by the
Cap bolt
Piston pin
Cap roller bearing
Rod cap
The component in the radiator of an automobile that increases the boiling point of water is
Drain plug
Water jacket
Vacuum valve
Pressure cap
The power source for a brake booster is
Exhaust manifold pressure
Electricity
The pressure difference between the atmospheric pressure and the vacuum pressure in the intake manifold
Hydraulic pump
With the increase of battery temperature, the specific gravity of electrolyte
Increases
Decreases
Remains the same
None of these
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
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 two kinds of piston rings are
Compression and oil control rings
Compression and sliding seal rings
Oil scrapper and oil control rings
Pressure and sealing rings
The starter motor is driven by
Chain drive
Gear drive
Flat belt drive
V-belt drive
The main function of an exhaust muffler is the
Optimisation of exhaust efficiency
Reduction of exhaust noise
Reduction of nitrogen oxide in the exhaust gases
Reduction of the exhaust gas volume
The material generally used for cylinder sleeves is
Aluminium
Ceramic
Cast iron
Fibre reinforced plastic
The basic purpose of providing caster angle on wheels is to
Prevent uneven tyre wear
Maintain directional control
Bring the road contact of the tyre under the point of load
Compensate for wear in the steering linkage
Caster is a
Forward tilt of the kingpin
Backward tilt of the kingpin
Either 'A' or 'B'
None of these
During suction stroke, the inside pressure of cylinder is
More than the atmospheric pressure
Less than the atmospheric pressure
Equal to the atmospheric pressure
None of these
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
A laminated glass upon cracking
Bursts into sharp edged fragments
Bursts into granular pieces
Sandwiched layer traps the fragments
Breaks into the form of crystals
If the air-fuel mixture in a spark ignition engine is too rich, then airfuel ratio is about
17 : 1
15 : 1
13 : 1
10 : 1