Motor Vehicle Inspector • 2025 • Paper-IV
What is the principle of battery charging?
A)
Converting AC to magnetic energy
B)
Reversing the chemical reaction by applying an external current
C)
Producing heat using electricity
D)
Storing fuel in battery
Option B is correct: Reversing the chemical reaction by applying an external current.
Motor Vehicle Inspector • 2025 • Paper-IV
The three main components of the primary ignition circuit are:
A)
Contact breaker, ignition switch, condenser
B)
Contact breaker, coil, battery
C)
Contact breaker, distributor, spark plugs
D)
Contact breaker, ignition coil, condenser
Option B is correct: Contact breaker, coil, battery.
Motor Vehicle Inspector • 2025 • Paper-IV
What is the main purpose of a braking system in a vehicle?
A)
To increase vehicle speed
B)
To provide better fuel economy
C)
To slow down or stop the vehicle
D)
To increase engine power
Option C is correct: To slow down or stop the vehicle.
Motor Vehicle Inspector • 2025 • Paper-IV
Bonnet of a car is usually hinged at:
A)
Rear or front depending on design
B)
Only rear side
C)
Only front side
D)
Left hand side
Option A is correct: Rear or front depending on design.
Motor Vehicle Inspector • 2025 • Paper-IV
Commonest lubrication system:
A)
Splash
B)
Petroil
C)
Pressure feed
D)
Mist feed
Option C is correct: Pressure feed.
Motor Vehicle Inspector • 2025 • Paper-IV
The main function of a cooling system in an IC engine is to
A)
Increase power output
B)
Prevent engine overheating
C)
Supply fuel to the engine
D)
Clean engine parts
Option B is correct: Prevent engine overheating.
Motor Vehicle Inspector • 2025 • Paper-IV
Firewall in an automobile separates:
A)
Engine compartment from passenger compartment
B)
Passenger compartment from luggage compartment
C)
Engine compartment from fuel tank
D)
Roof from body side
Option A is correct: Engine compartment from passenger compartment.
Motor Vehicle Inspector • 2025 • Paper-IV
Which of the following is not a type of chassis frame?
A)
Ladder frame
B)
Tubular frame
C)
Monocoque frame
D)
Flywheel frame
Option D is correct: Flywheel frame.
Motor Vehicle Inspector • 2025 • Paper-IV
The tyre specification ‘6.00 – 16’ denotes:
A)
Tyre section width and rim diameter in inches
B)
Tyre circumference and rim width in inches
C)
Ply rating and load index
D)
Tyre height and rim height in inches
Option A is correct: Tyre section width and rim diameter in inches.
Motor Vehicle Inspector • 2025 • Paper-IV
Most common water pump type is:
A)
Vane type
B)
Centrifugal type
C)
Reciprocating type
D)
Gear type
Option B is correct: Centrifugal type.
Motor Vehicle Inspector • 2025 • Paper-IV
The main advantage of a split rim is:
A)
Lower cost
B)
Better appearance
C)
Easier mounting and demounting of tires
D)
More color options
Option C is correct: Easier mounting and demounting of tires.
Motor Vehicle Inspector • 2025 • Paper-IV
In an air brake system, compressed air is stored in:
A)
Brake shoes
B)
Air reservoir
C)
Compressor cylinder
D)
Vacuum chamber
Option B is correct: Air reservoir.
Motor Vehicle Inspector • 2025 • Paper-IV
The best hydrocarbons from detonation viewpoint are:
A)
Paraffins
B)
Olefins
C)
Naphthenes
D)
Aromatics
Option D is correct: Aromatics.
Motor Vehicle Inspector • 2025 • Paper-IV
The main advantage of wire spoked wheels is:
A)
High weight
B)
Flexibility and shock absorption
C)
Poor appearance
D)
High manufacturing cost
Option B is correct: Flexibility and shock absorption.
Motor Vehicle Inspector • 2025 • Paper-IV
The primary component that increases surface area for heat dissipation in an air-cooled engine is:
A)
Radiator
B)
Thermostat
C)
Fins
D)
Pump
Option C is correct: Fins.
Motor Vehicle Inspector • 2025 • Paper-IV
Which part directs airflow over the fins in some air-cooled engines?
A)
Fan
B)
Radiator
C)
Oil cooler
D)
Thermostat
Option A is correct: Fan.
Motor Vehicle Inspector • 2025 • Paper-IV
In a drum brake system, the brake shoes press against:
A)
Brake pads
B)
Brake disc
C)
Inner surface of the drum
D)
Outer surface of the drum
Option C is correct: Inner surface of the drum.
Motor Vehicle Inspector • 2025 • Paper-IV
Which of the following is a disadvantage of integral construction?
A)
Increased weight
B)
Lower fuel efficiency
C)
Difficult and expensive to repair after an accident
D)
High center of gravity
Option C is correct: Difficult and expensive to repair after an accident.
Motor Vehicle Inspector • 2025 • Paper-IV
Which of the following engines uses a radiator as part of its cooling system?
A)
Air-cooled engine
B)
Water-cooled engine
C)
Electric motor
D)
Diesel generator
Option B is correct: Water-cooled engine.
Motor Vehicle Inspector • 2025 • Paper-IV
A fuel with an octane number of 90 means:
A)
It has 90% octane
B)
It behaves like a mixture of 90% iso-octane and 10% n-heptane
C)
It contains 90% gasoline
D)
It gives 90% efficiency in an engine
Option B is correct: It behaves like a mixture of 90% iso-octane and 10% n-heptane.
Motor Vehicle Inspector • 2025 • Paper-IV
Flash point is:
A)
Temp for continuous burning
B)
Min vapour temp
C)
Temp vapour ignites momentarily
D)
Additive melting point
Option C is correct: Temp vapour ignites momentarily.
Motor Vehicle Inspector • 2025 • Paper-IV
The spoke wheel is mostly found in:
A)
Heavy-duty trucks
B)
Bicycles and motorcycles
C)
Trains
D)
Aircraft
Option B is correct: Bicycles and motorcycles.
Motor Vehicle Inspector • 2025 • Paper-IV
Excessive tyre wear on both edges indicates:
A)
Over inflation
B)
Under inflation
C)
Wheel misalignment
D)
Excessive camber
Option B is correct: Under inflation.
Motor Vehicle Inspector • 2025 • Paper-IV
Disc brakes use friction pads to press against:
A)
Outer surface of the brake drum
B)
Inner surface of the brake drum
C)
Both sides of a rotating disc
D)
A toothed sprocket
Option C is correct: Both sides of a rotating disc.
Motor Vehicle Inspector • 2025 • Paper-IV
In a ladder type chassis, the longitudinal members are connected by:
A)
Leaf springs
B)
Cross members
C)
Mudguards
D)
Shock absorbers
Option B is correct: Cross members.
