The advantage of having a tandem master cylinder arrangement in automobiles is that it
1.Enhances safety by serving two independent lines in a divided line brake circuit
2.Enhances safety by activating the brakes using vacuum pressure in the event of brake fluid loss
3.Supplies equal fluid pressure to each line of a divided line brake circuit, thereby preventing the brakes from dragging on one side
4.Boosts the brake fluid pressure to reduce the force required to depress the brake pedal
The advantage of the fuel injection system over the carburettor system is
1.Improved fuel efficiency
2.Improved emission
3. Improved power output
4.All of the above
The condition that causes vapour locking in a brake system is
1.Overheating of the fluid due to frequent brake application
2.Overcooling of the brakes during high speed driving
3.Keeping the vehicle without use for an extended period
4. An excessively high engine speed on a downhill road
The function of a governor in automobiles is to
1.Limit the power
2.Limit the vehicle speed
3.Maintain constant engine speed
4.Maximise the fuel economy
The temperature indicating instrument in vehicles indicates the temperature of
1.Engine piston
2.Engine
3.Lubricating oil
4.Jacket cooling water
Which one of the following statement correctly describes the construction of a bevel gear type differential?
1.The drive shafts are splined to the differential carrier.
2.The left side gear and the differential carrier rotate in constant unison.v
3.The left side gear and the differential carrier rotate in constant unison.
4.The differential carrier houses differential pinion gears and side gears.
. In a four cylinder inline engine, the number of firing strokes in one revolution of the crank is
1.1
2.2
3.3
4.4
. The operation of removing trapped air from the hydraulic braking system is known as
1.Trapping
2.Tapping
3.Bleeding
4.Cleaning
A maintenance free battery
1. Has lead-antimony plate grid
2.Has lead-calcium plate grid
3.Does not contain acid
4.Does not contain water
Bead wires are made of
1.Steel
2.Copper
3.Zinc
4.Aluminium
Cushioning springs in clutch plate reduces
1. Vehicle speed
2.Torsional vibrations
3. Jerky starts
4.None of these
How many cells are used in a 12 volt car battery?
1.2
2.4
3.6
4.8
If a tyre is designated as 175/65 R-14 82-S, then the aspect ratio for the tyre is
1.175
2.65
3.14
4.82
If the air-fuel mixture in a spark ignition engine is too rich, then air-fuel ratio is about
1.17:1
2.15:1
3.13:1
4.10:1
In a four wheel drive (4WD), the numbers of gear boxes are
1.1
2.2
3.3
4.4
In a single dry plate clutch, torsional vibrations are absorbed by
1.Coil springs known as torsional springs
2.Cushion springs
3.Central hub
4.Clutch pedal
In an engine, the temperature of the piston will be more at the
1.Crown of the piston
2.Skirt of the piston
3. Piston walls
4. Piston rings
Incorrect steering axis inclination (S.A.I.) causes
1.Tendency to assume toe-out orientation
2.Generation of a braking effect at tight corners
3.Poor recovery of the steering wheel after making a turn
4.The vehicle to pull to the side of lesser inclination
Odometer is an instrument used for measurement of
1. Power
2.Fuel consumption
3.Engine r.p.m
4.Distance
Petrol that detonates easily is called
1.High octane petrol
2.Low octane petrol
3.Unleaded petrol
4.Blended fuel
Tachometer in a vehicle measures
1.Speed
2.Distance
3. Engine r.p.m.
4.Fuel consumption
The advantage of a tubeless tyre over tube type tyre is
1. Slow air leakage
2.Better fuel efficiency
3.Less chances of running flat
4.All of the above
The basic part of the engine, to which the other engine parts are attached or assembled is the
1. Cylinder head
2.Crankshaft
3. Cylinder block
4.Oil pan
The brake pedal during ABS operation
1.Is pushed upward forcefully
2.Pedal stroke becomes longer
3.Transmits slight kickback to the driver's foot
4.All of the above
The connecting rod lower end is connected to the relevant ________ of crankshaft.
1.Big end
2.Crank arm
3.Journal
4.Small end
The ease with which petrol vaporizes is called its
1.Oxidation
2.Octane number
3.Volatility
4.Cetane number
The firing order for an inline four cylinder I.C. engine is
1. 1-2-3-4
2.1-3-4-2
3. 1-2-4-3
4.1-3-2-4
The function of a connecting rod is
1.To turn the flywheel
2. To drive the drive plate
3.To drive the fuel pump
4.To transmit motion of the piston to the crankshaft
The function of a second ring is that it is a
1.Back up compression ring which will work in place of the top ring when it is broken
2.Compression ring and aids the top ring in sealing and cooling
3. Back up oil control ring which will work in place of the bottom ring when it is broken
4.Cushion ring which prevents piston slap and knock
The function of an alternator in an automobile is to
1.Supply electric power
2.Converts mechanical energy into electrical energy
3.Continually recharges the battery
4.Partly converts engine power into electric power
The function of anti-lock brake system (ABS) is that is
1. Reduces the stopping distance
2.Minimizes the brake fade
3.Maintains directional control during braking by preventing the wheels from locking
4. Prevents nose dives during braking and thereby postpones locking of the wheels
The information provided by the oxygen (Oâ‚‚) sensor to the feedback control system is about the
1.Air-fuel ratio
2.Air temperature
3.Air flow speed
4.Exhaust gas volume
The main function of intake manifold is that it
1.Promotes the mixture of air and fuel
2.Reduces intake noise
3.Cools the intake air to a suitable temperature
4.Distributes intake air equally to the cylinders
The minimum parking brake force is generally ___________ of gross vehicle mass (GVM).
1. 5%
2. 10%
3. 15%
4. 20%
The motion of the cam is transferred to the valves through
1.Pistons
2.Rocker arms
3.Camshaft pulley
4.Valve stems
The number of exhaust manifolds in a V6 engine is
1.One
2.Two
3.Four
4.Eight
The number of exhaust manifolds in a V6 engine is
1.One
2.Two
3.Four
4.Eight
The octane number of compressed natural gas (CNG) is
1.90
2.100
3.110
4.120
The oil pump is driven by the
1.Camshaft
2.Alternator shaft
3.Crankshaft via drive belt
4.Crankshaft directly
The power actually developed inside the engine cylinder is called as
1.Indicated power
2.Brake power
3.Frictional power
4.None of these
The rating of C.I. engine fuel (Diesel) is given by
1.Octane number
2. Performance number
3.Cetane number
4.None of these
The seat belt tensioners are built in the
1.Front seats
2.Shoulder anchors
3.Seat belt retractors
4. Seat belt buckles
The specific gravity of petrol is about
1.0.75
2.0.85
3.0.95
4.1.25
The two rows of cylinders in a 'V' type engine are generally arranged at
1.45°
2. 60°
3.90°
4.130°
The valve tappet clearance is measured by
1.Screw pitch gauge
2.Engineering scale
3.Feeler gauge
4.Vernier caliper
Two general types of tyres are
1. Tube type and tubeless
2. Solid and tubeless
3. Air and pneumatic
4.Split rim and drop centre
When indicated power (I.P.) and frictional power (F.P.) are known, we can calculate
1.Brake power
2.Compression ratio
3.Specific air consumption
4.Mean effective pressure
Which of the following symptom is caused as a result of brake disc run out?
1.Ineffectiveness of the brakes
2. Judder during braking
3.Localized wearing of the brake pads
4.Rapid wearing of the brake pads