Motor Vehicle Inspector • 2025 • Paper-IV
Usual type of starter motor in automobiles is:
A)
Shunt wound
B)
Series wound
C)
Compound wound
D)
Separately excited
Option B is correct: Series wound.
Motor Vehicle Inspector • 2025 • Paper-IV
The effectiveness of a brake depends largely on:
A)
Frictional contact area and coefficient
B)
Cooling system capacity
C)
Air–fuel mixture strength
D)
Type of suspension used
Option A is correct: Frictional contact area and coefficient.
Motor Vehicle Inspector • 2025 • Paper-IV
The capacity of a battery is usually expressed in:
A)
Watts
B)
Volts
C)
Ampere-hours (Ah)
D)
Horsepower
Option C is correct: Ampere-hours (Ah).
Motor Vehicle Inspector • 2025 • Paper-IV
Thermostat valve starts opening at about:
A)
50 °C
B)
65 °C
C)
80 °C
D)
95 °C
Option C is correct: 80 °C.
Motor Vehicle Inspector • 2025 • Paper-IV
Main function of a chassis frame:
A)
Provide shape to the body
B)
Support and carry load of engine, passengers, goods
C)
Protect electrical system
D)
Control lubricant flow
Option B is correct: Support and carry load of engine, passengers, goods.
Motor Vehicle Inspector • 2025 • Paper-IV
Lubrication also helps in:
A)
Sealing combustion gases
B)
Increasing octane number
C)
Boosting tyre grip
D)
Reducing crankshaft length
Option A is correct: Sealing combustion gases.
Motor Vehicle Inspector • 2025 • Paper-IV
In disc brakes, the braking force is applied by:
A)
Brake pads pressing on a rotating disc
B)
Brake shoes pressing on a drum
C)
Hydraulic oil pressing on a belt
D)
Springs compressing a flywheel
Option A is correct: Brake pads pressing on a rotating disc.
Motor Vehicle Inspector • 2025 • Paper-IV
Air hydraulic brakes combine features of:
A)
Hydraulic and electric systems
B)
Hydraulic and cable systems
C)
Air and hydraulic systems
D)
Disc and drum brakes
Option C is correct: Air and hydraulic systems.
Motor Vehicle Inspector • 2025 • Paper-IV
A wheel must be dynamically balanced to:
A)
Reduce engine vibrations
B)
Ensure proper gear shifting
C)
Prevent wobbling at high speeds
D)
Increase wheel weight
Option C is correct: Prevent wobbling at high speeds.
Motor Vehicle Inspector • 2025 • Paper-IV
Which of the following is the most commonly used battery in automobiles?
A)
Nickel-cadmium battery
B)
Lead-acid battery
C)
Lithium-ion battery
D)
Zinc-carbon battery
Option B is correct: Lead-acid battery.
Motor Vehicle Inspector • 2025 • Paper-IV
When the throttle is suddenly opened, the carburettor:
A)
Supplies less fuel
B)
Closes the choke
C)
Delays ignition
D)
Delivers an extra burst of fuel via the accelerator pump
Option D is correct: Delivers an extra burst of fuel via the accelerator pump.
Motor Vehicle Inspector • 2025 • Paper-IV
The main requirement of road wheels is to withstand:
A)
Engine torque only
B)
Vehicle load only
C)
Both vehicle load and road shocks
D)
Only braking force
Option C is correct: Both vehicle load and road shocks.
Motor Vehicle Inspector • 2025 • Paper-IV
Air cooling is mostly used in:
A)
Heavy-duty trucks
B)
Motorcycles and scooters
C)
Large industrial engines
D)
Marine engines
Option B is correct: Motorcycles and scooters.
Motor Vehicle Inspector • 2025 • Paper-IV
Ability of body structure to absorb crash energy is:
A)
Aerodynamic resistance
B)
Impact strength
C)
Crashworthiness
D)
Elastic rebound
Option C is correct: Crashworthiness.
Motor Vehicle Inspector • 2025 • Paper-IV
The pressure lubrication system uses which of the following to circulate oil?
A)
Manual pump
B)
Centrifugal fan
C)
Oil pump
D)
Splash plate
Option C is correct: Oil pump.
Motor Vehicle Inspector • 2025 • Paper-IV
In splash lubrication, oil is:
A)
Pumped under high pressure
B)
Thrown as mist by engine parts
C)
Sprayed by compressed air
D)
Poured manually
Option B is correct: Thrown as mist by engine parts.
Motor Vehicle Inspector • 2025 • Paper-IV
Which of the following engine components is not directly lubricated by the oil system?
A)
Camshaft
B)
Crankshaft
C)
Piston rings
D)
Spark plug
Option D is correct: Spark plug.
Motor Vehicle Inspector • 2025 • Paper-IV
Which of the following is a common type of wheel used in modern passenger vehicles?
A)
Wooden spoke wheel
B)
Disc wheel
C)
Chain wheel
D)
Rimless wheel
Option B is correct: Disc wheel.
Motor Vehicle Inspector • 2025 • Paper-IV
The usual ratio for mixing anti-freeze with water in automotive applications is:
A)
90:10
B)
70:30
C)
50:50
D)
10:90
Option C is correct: 50:50.
Motor Vehicle Inspector • 2025 • Paper-IV
Anti-freeze is typically mixed with:
A)
Petrol
B)
Engine oil
C)
Brake fluid
D)
Water
Option D is correct: Water.
Motor Vehicle Inspector • 2025 • Paper-IV
Which lubrication system is commonly used in high-speed automobile engines?
A)
Splash system
B)
Semi-pressure system
C)
Pressure lubrication system
D)
Gravity system
Option C is correct: Pressure lubrication system.
Motor Vehicle Inspector • 2025 • Paper-IV
If the float valve gets stuck often, what is the likely effect?
A)
Air filter will clog
B)
Fuel overflow from carburettor
C)
Engine overheating
D)
Lean mixture
Option B is correct: Fuel overflow from carburettor.
Motor Vehicle Inspector • 2025 • Paper-IV
What component ensures smooth engine operation at idle speed?
A)
Accelerator pump
B)
Idle jet
C)
Choke
D)
Venturi
Option B is correct: Idle jet.
Motor Vehicle Inspector • 2025 • Paper-IV
The main function of a headlamp in a vehicle is to:
A)
Alert the driver
B)
Illuminate the road ahead during low visibility
C)
Start the engine
D)
Indicate speed
Option B is correct: Illuminate the road ahead during low visibility.
Motor Vehicle Inspector • 2025 • Paper-IV
Negative plate of a lead acid battery is:
A)
Lead dioxide (PbO2)
B)
Sponge lead (Pb)
C)
Lead sulphate (PbSO4)
D)
Dilute sulphuric acid (H2SO4)
Option B is correct: Sponge lead (Pb).
