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WorksheetsAutomobile Engineering Unit-1 MCQ's Quiz
Total questions: 30
Worksheet time: 30mins
Which of the following best defines an automobile?
A manually driven vehicle
A self-propelled vehicle used for transportation
A stationary mechanical device
A rail-based transport system
Passenger cars, buses, and trains are classified under which category?
Goods vehicles
Passenger vehicles
Special purpose vehicles
Heavy-duty vehicles
Which of the following is a special purpose vehicle?
Truck
Ambulance
Car
Scooter
Light duty vehicles include:
Trucks and tractors
Cars and motorcycles
Buses and lorries
Bulldozers and cranes
What is the main feature of frameless construction in vehicles?
Separate chassis frame
Body and chassis integrated
Heavy load capacity
Rigid steel frame only
A fluid drive system employs:
Manual clutch
Torque converter or hydramatic transmission
Belt and pulley
Direct gear linkage
Aerodynamics deals with:
Vehicle suspension
Airflow and forces on moving bodies
Fuel combustion process
Electrical systems in vehicles
Which force acts opposite to the direction of vehicle motion?
Lift
Drag
Weight
Thrust
Rear vacuum in cars is mainly caused by:
Frontal air compression
Flow detachment at the rear
Lift at high speed
Excessive thrust
Proper streamlining can reduce fuel consumption by approximately:
10%
20%
35%
50%
Which aerodynamic factor is dangerous at high speeds?
Lift
Drag
Thrust
Weight
Aerodynamic design helps in achieving all of the following except:
Increased fuel economy
Reduced noise
Increased body weight
Improved stability
The frontal area (A) in the drag equation refers to:
Top surface area
Side profile area
Area facing airflow
Rear surface area
Aerodynamic study is not commonly applied in:
Aircraft design
Ship sails
Bridge wind load analysis
Internal engine cooling
The main function of the cylinder head in an internal combustion engine is to:
Support the crankshaft
Close the top of the cylinder and house valves/spark plug
Connect piston to crankshaft
Provide lubrication
The connecting rod connects the:
Crankshaft to camshaft
Piston to flywheel
Piston to crankshaft
Cylinder to piston
The clearance volume in an I.C. engine is the:
Volume displaced by piston movement
Volume above the piston at top dead center
Volume below the piston at bottom dead center
Volume swept per revolution
The compression ratio of an I.C. engine is the ratio of:
Swept volume to clearance volume
Clearance volume to total volume
Total cylinder volume to clearance volume
Swept volume to total volume
The term TDC (Top Dead Centre) refers to:
Position of the piston farthest from the cylinder head
Position of the piston closest to the cylinder head
Center of crankshaft rotation
None of the above
The indicated power (IP) of an engine is the:
Power developed at the crankshaft
Power developed inside the engine cylinder
Power lost due to friction
Brake power multiplied by mechanical efficiency
The mechanical efficiency of an engine is the ratio of:
Brake Power to Indicated Power
Indicated Power to Brake Power
Friction Power to Indicated Power
Indicated Power to Friction Power
Friction power is calculated as:
FP = BP + IP
FP = IP – BP
FP = BP – IP
FP = IP × BP
In a four-stroke engine, how many revolutions of the crankshaft are required to complete one power cycle?
One
Two
Four
Half
In a two-stroke engine, power stroke occurs:
Once every revolution
Once every two revolutions
Once every four revolutions
Every half revolution
The main advantage of a two-stroke engine is:
High fuel efficiency
Simpler design and lighter weight
Lower noise
Better lubrication
Which of the following operations occurs simultaneously in a two-stroke engine?
Suction and exhaust
Compression and power
Suction and compression
Power and exhaust
The brake power (BP) is given by the formula:
BP = 2πNT / 60
BP = P × V
BP = T / 2πN
BP = N × Torque
If the brake power (BP) is 5 kW and indicated power (IP) is 6.25 kW, then mechanical efficiency is:
60%
75%
80%
85%
An engine develops a torque of 100 Nm at 3000 rpm. Find its brake power in kW.
31.4 kW
15.7 kW
20.9 kW
10.5 kW
If an engine develops IP = 40 kW and FP = 8 kW, find the brake power and mechanical efficiency.
BP = 32 kW, ηm = 80%
BP = 30 kW, ηm = 75%
BP = 38 kW, ηm = 90%
BP = 28 kW, ηm = 70%
