The purpose of a balancer shaft is to
Balance the timing in the movement of the two groups of pistons
Increase inertia force of the rotating crankshaft
Reduce vibrations caused by the crankshaft rotation
Adjusts the timing of the intake and exhaust valve openings
Correct Answer :
C. Reduce vibrations caused by the crankshaft rotation
Related Questions
The characteristic that is enhanced by the honing of cylinder sleeves inner surface is
Cooling efficiency
Resistance to wear
Lubrication performance
None of these
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
Free pedal play in car clutches is about
15 mm
25 mm
40mm
60 mm
The compression ratio in petrol engine is kept less than in Diesel engine because
It makes petrol engines lighter
Higher or equivalent compression ratio in petrol engines is not possible due to pre-ignition
Less compression ratio gives better performance
It is just customary to have less compression ratio in petrol engines
The operation of removing trapped air from the hydraulic braking system is known as
Trapping
Tapping
Bleeding
Cleaning
In an engine, the temperature of the piston will be more at the
Crown of the piston
Skirt of the piston
Piston walls
Piston rings
The main task of a battery in automobiles is to
Supply electricity to the alternator
Act as a reservoir or stabilizer of electricity
Supply electricity to the vehicle's electrical system at all times while the engine is running
Supply a large amount of power to turn the starter motor when the engine is being started
The service brakes employed in cars are generally operated
Mechanically
Hydraulically
Pneumatically
None of these
The forced fed lubrication system means that the oil is delivered to the engine by
Gravity
The pressure created by the oil pump
Splashing action of the crankshaft
None of these
The two rows of cylinders in a 'V' type engine are generally arranged at
45°
60°
90°
130°
In a petrol engine, the high voltage for spark plug is in the order of
1000 volts
2000 volts
11 kilovolts
22 kilovolts
In a single dry plate clutch, torsional vibrations are absorbed by
Coil springs known as torsional springs
Cushion springs
Central hub
Clutch pedal
A maintenance free battery
Has lead-antimony plate grid
Has lead-calcium plate grid
Does not contain acid
Does not contain water
Which one of the following statement correctly describes the construction of a bevel gear type differential?
The drive shafts are splined to the differential carrier.
The left side gear and the differential carrier rotate in constant unison.
The differential carrier houses differential pinion gears and side gears; each pinion gear meshes with a different side gear.
The differential carrier houses differential pinion gears and side gears
When the piston is at T.D.C, the volume above the piston in the combustion chamber is the
Clearance volume
Cylinder volume
Exhaust volume
None of these
The calorific value of Diesel is about
36.5 MJ/kg
38.5 MJ/kg
42.5 MJ/kg
45.5 MJ/kg
Which of the following bulb in a car will have the least wattage?
Head light bulb
Stop light bulb
Parking light bulb
Ignition warning bulb
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 advantage of a tubeless tyre over tube type tyre is
Slow air leakage
Better fuel efficiency
Less chances of running flat
All of these
The basic characteristics of a brake fluid is
A high boiling point
Low viscosity
Compatibility with rubber and metal parts
All of these
The connecting rods are generally made of ________ shaped crosssection.
I
C
L
H
When turning a corner
The front wheels are toeing out
The front wheels are turning on different angles
The inside front wheels has a greater angle than the outside wheel
All of the above
In a four speed four stroke Diesel engine, the intake valve
Opens at T.D.C. and closes at B.D.C.
Opens at 20° before T.D.C. and closes at 35° after B.D.C.
Opens at 10° after T.D.C. and closes at 20° before B.D.C.
None of the above
Tachometer in a vehicle measures
Speed
Distance
Engine r.p.m.
Fuel consumption
A three way catalytic converter
Re-circulates exhaust gases
Burns fuel vapour gases
Reduces N₂, H₂O, and CO₂ emission levels
Removes CO, HC, and NO₂ from the exhaust gasses passing through it
The component of the oil filter that prevents the passage of metal particles and sludge is
Element
Relief valve
Check valve
Case
The function of an oil control orifice is that it
Returns cylinder head lubricating oil to the oil pan at high speed
Turns oil into fine mist for spray lubrication
Regulates the pressure of engine oil supplied by the oil pump for the lubrication of cylinder head mechanism and other purposes
Removes impurities from cylinder head lubricating oil
The main cause for the change in engine oil viscosity is
Humidity
Temperature
Vibration
Contamination
Which of the following parameter can be adjusted by modifying the tie rod attachment length?
Camber
Caster
Toe
Steering gear ratio
The fuel pump in the programmed fuel injection (PFI) system is located
Between the fuel filler pipe and fuel tank
In the fuel tank
On the distributor mounting in the engine compartment
On the engine compartment bulkhead