The function of positive crankcase ventilation (PCV) system is that it
Mixes fuel with air
Promotes combustion by creating a swirling movement in the air-fuel mixture
Returns blow by gases from the crankcase to the intake system
Feeds blow by gases to the exhaust manifold
Correct Answer :
C. Returns blow by gases from the crankcase to the intake system
Related Questions
In a forced feed lubrication system, the device used to guard against excessive oil pressure, is known as
Release chamber
Balancer
Relief valve
Stop valve
An overinflated tyre will wear the tread most near the
Edges
Corners
Centre
None of these
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
The rigid suspension is beneficial when
It is desired to reduce the unsprung mass
It is desired to have more flexibility in design
It is desired to improve tyre to ground contact characteristics
Large changes in load make it necessary to have a large suspension stroke
In a hydraulic power steering system, the power steering pump is driven by a
Belt driven by camshaft
Chain driven by crankshaft
Belt driven by driveshaft
Belt driven by crankshaft
Damper in an automobile is used to
Absorb the energy
Dissipate the energy
Release the energy
Increase the energy
Engine misfiring is likely to result from
Spark plug gap too small
Spark plug gap too wide
Vapours lock in the fuel only
Incorrect fuel air mixture
In automobiles G.V.W. refers to
Gross vehicle width
Gross vehicle weight
Gross vehicle wheel base
Gross vehicle wheel track
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 connecting rods are generally made of ________ shaped crosssection.
I
C
L
H
The function of an alternator in an automobile is to
Supply electric power
Converts mechanical energy into electrical energy
Continually recharges the battery
Partly converts engine power into electric power
Tachometer in a vehicle measures
Speed
Distance
Engine r.p.m.
Fuel consumption
The crescent shaped cavity on the piston head top surface is called as
Piston oil hole
Snap ring
Valve recess
Valve clearance
The negative plates of a lead acid battery has
Lead peroxide (PbO₂)
Spongy lead (Pb)
Lead sulphate (PbSO₄)
Sulphuric acid (H₂SO₄)
In vehicles with tilt steering, the steering column is pivoted in
Upper bracket
Lower bracket
Tilt bracket
Steering yoke joint
The major purpose of an electronically controlled automatic transmission is that this type of transmission
Eliminates gear clutches
Eliminates the gear shaft lever
Reduces the number of automatic transmission components
Reduces shift shock and achieves more efficient transmission of engine torque
Two advantages of using helical gears rather than spur gears in a transmission system are
Strength and cost
Strength and less end thrust
Noise level and strength
Noise level and economy
A clutch is usually designed to transmit maximum torque which is
Equal to the maximum engine torque
80 % of the maximum engine torque
150 % of the maximum engine torque
None of these
The parking brake generally acts on
Front wheels
Rear wheels
Front and rear wheels
Propeller shaft
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 main merit of a multi cylinder type cylinder sleeve is
Smaller engine dimensions
Better cooling efficiency
High rigidity
None of these
The vehicle ride will be comfortable if
Unsprung mass is kept minimum
Sprang mass is kept minimum
Vehicle mass is kept minimum
All of these
The clutch is located between the transmission and the
Engine
Rear axle
Propeller shaft
Differential
The engine oil viscosity is defined by _________ ratings.
Automatic transmission fluid (ATF)
Society of automotive engineers (SAE)
Gross vehicle weight (GVW)
American petroleum institute (API)
Which of the following parameter can be adjusted by modifying the tie rod attachment length?
Camber
Caster
Toe
Steering gear ratio
The braking control type traction control system (TCS) generally operates in the speed range of
Less than 20 kmph
Less than 40 kmph
Less than 60 kmph
More than 60 kmph
The purpose of a cylinder head gasket is to
Prevent the combustion gases from leaking from the joint between the cylinder block and the cylinder head
Prevent engine oil from going into combustion chamber
Removes impurities from cylinder head lubricating oil
None 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
The characteristic that is enhanced by the use of cylinder sleeves is
Cooling efficiency
Resistance to wear
Lubrication performance
None of these
The auto ignition in a spark ignition engine means
Automatic ignition of the charge at the end of compression
Ignition induced by the passage of a spark
Ignition of the charge before the passage of flame front
Ignition induced to supplement the process of normal combustion