Motor Vehicle Inspector • 2025 • Paper-IV
A van body used for goods transport is generally:
A)
Closed box type
B)
Open platform type
C)
Semi cab type
D)
Articulated type
Option A is correct: Closed box type.
Motor Vehicle Inspector • 2025 • Paper-IV
The cetane number is a measure of:
A)
Self ignition quality of diesel fuel
B)
Burning velocity of petrol
C)
Lead content in petrol
D)
Hydrocarbon emission level
Option A is correct: Self ignition quality of diesel fuel.
Motor Vehicle Inspector • 2025 • Paper-IV
Commercial vehicles mostly use which type of wheel?
A)
Alloy wheels
B)
Plastic wheels
C)
Pressed steel disc wheels
D)
Wooden wheels
Option C is correct: Pressed steel disc wheels.
Motor Vehicle Inspector • 2025 • Paper-IV
The main purpose of a dynamo or alternator in a vehicle is to:
A)
Control speed
B)
Start the engine
C)
Generate electricity to charge the battery and power electrical components
D)
Supply fuel to the engine
Option C is correct: Generate electricity to charge the battery and power electrical components.
Motor Vehicle Inspector • 2025 • Paper-IV
High viscosity index means:
A)
Large change with temp
B)
Small change with temp
C)
Low boiling point
D)
Poor film strength
Option B is correct: Small change with temp.
Motor Vehicle Inspector • 2025 • Paper-IV
Which of the following components is found only in water-cooled systems?
A)
Cylinder fins
B)
Radiator
C)
Spark plug
D)
Piston
Option B is correct: Radiator.
Motor Vehicle Inspector • 2025 • Paper-IV
In a simple carburettor, the air-fuel ratio is controlled by:
A)
Spark plug
B)
Float chamber
C)
Throttle valve
D)
Radiator
Option C is correct: Throttle valve.
Motor Vehicle Inspector • 2025 • Paper-IV
Dwell in ignition systems refers to:
A)
Distance between spark plug electrodes
B)
Angle/time contact points remain closed
C)
Period between two sparks in the same cylinder
D)
Duration of combustion in cylinder
Option B is correct: Angle/time contact points remain closed.
Motor Vehicle Inspector • 2025 • Paper-IV
Water cooled engines are preferred in cars because they:
A)
Weigh less
B)
Operate more quietly and evenly
C)
Are cheaper to manufacture
D)
Need no radiator
Option B is correct: Operate more quietly and evenly.
Motor Vehicle Inspector • 2025 • Paper-IV
Tubular frame is commonly found in:
A)
Racing cars and motorcycles
B)
Heavy duty buses
C)
Multi axle trucks
D)
Tractors
Option A is correct: Racing cars and motorcycles.
Motor Vehicle Inspector • 2025 • Paper-IV
The main purpose of a brake in an automobile is to:
A)
Reduce engine vibration
B)
Convert kinetic energy into heat energy
C)
Increase tyre grip on wet roads
D)
Control fuel consumption
Option B is correct: Convert kinetic energy into heat energy.
Motor Vehicle Inspector • 2025 • Paper-IV
In the magneto ignition system, electricity is generated by:
A)
Battery only
B)
Generator
C)
Permanent magnets and coils
D)
Alternator
Option C is correct: Permanent magnets and coils.
Motor Vehicle Inspector • 2025 • Paper-IV
A ‘spongy’ brake pedal in hydraulics is usually caused by:
A)
Excess fluid pressure
B)
Air in brake lines
C)
Sticking brake shoes
D)
High friction coefficient of lining
Option B is correct: Air in brake lines.
Motor Vehicle Inspector • 2025 • Paper-IV
Conventional chassis frame is usually made from:
A)
Cast iron
B)
Mild steel channel sections
C)
Stainless steel tubes
D)
Aluminium alloy
Option B is correct: Mild steel channel sections.
Motor Vehicle Inspector • 2025 • Paper-IV
The main advantage of radial tyres over cross ply tyres is:
A)
Lower mileage
B)
Better fuel economy and grip
C)
Higher rolling resistance
D)
Poor cornering stability
Option B is correct: Better fuel economy and grip.
Motor Vehicle Inspector • 2025 • Paper-IV
Which of the following is not a function of engine lubrication?
A)
Cooling of engine parts
B)
Sealing between piston and cylinder
C)
Fuel atomization
D)
Cleaning of engine components
Option C is correct: Fuel atomization.
Motor Vehicle Inspector • 2025 • Paper-IV
Cooling fans in modern cars are driven by:
A)
Only belt drive
B)
Only electric motor
C)
Gears and belts
D)
Either electric motor or belt drive
Option D is correct: Either electric motor or belt drive.
Motor Vehicle Inspector • 2025 • Paper-IV
The floor of a passenger car is generally made from:
A)
Wood
B)
Mild steel sheet
C)
Glass fibre
D)
Cast aluminium
Option B is correct: Mild steel sheet.
Motor Vehicle Inspector • 2025 • Paper-IV
Which component in hydraulic brakes converts foot pressure into hydraulic pressure?
A)
Wheel cylinder
B)
Master cylinder
C)
Brake pad
D)
Drum
Option B is correct: Master cylinder.
Motor Vehicle Inspector • 2025 • Paper-IV
Which of the following is NOT a part of a disc brake system?
A)
Rotor (disc)
B)
Caliper
C)
Brake shoe
D)
Brake
Option C is correct: Brake shoe.
Motor Vehicle Inspector • 2025 • Paper-IV
Which component is most directly lubricated to reduce friction between piston and cylinder?
A)
Cylinder head
B)
Crankshaft
C)
Piston rings
D)
Valve spring
Option C is correct: Piston rings.
Motor Vehicle Inspector • 2025 • Paper-IV
An ideal brake should have:
A)
Low braking force
B)
Slow response time
C)
High wear rate
D)
High braking efficiency and quick response
Option D is correct: High braking efficiency and quick response.
Motor Vehicle Inspector • 2025 • Paper-IV
A high viscosity oil is:
A)
Very thin and flows easily
B)
Highly corrosive
C)
Thick and flows slowly
D)
Very volatile
Option C is correct: Thick and flows slowly.
Motor Vehicle Inspector • 2025 • Paper-IV
Which of the following is a common method of battery charging in vehicles?
A)
Manual charging
B)
Induction charging
C)
Constant voltage charging
D)
Steam charging
Option C is correct: Constant voltage charging.
Motor Vehicle Inspector • 2025 • Paper-IV
A good chassis frame must be:
A)
Heavy and flexible
B)
Rigid and strong
C)
Soft and light
D)
Flexible and low strength
Option B is correct: Rigid and strong.
