MCQOPTIONS
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MCQOPTIONS
This section includes 365 Mcqs, each offering curated multiple-choice questions to sharpen your Automobile Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 101. |
Bead wires are made of |
| A. | Steel |
| B. | Copper |
| C. | Zinc |
| D. | Aluminium |
| Answer» B. Copper | |
| 102. |
Vulcanizing means |
| A. | Heating rubber under pressure |
| B. | Spraying with special paint |
| C. | Melting rubber while stirring it |
| D. | None of these |
| Answer» B. Spraying with special paint | |
| 103. |
How many cells are used in a 12 volt car battery? |
| A. | 2 |
| B. | 4 |
| C. | 6 |
| D. | 8 |
| Answer» D. 8 | |
| 104. |
An imbalance wheel during vehicle operation |
| A. | Makes large noise when its heavy point hits the road surface |
| B. | Deflects in the vehicle's longitudinal direction |
| C. | Bounces vertically or deflects from side to side (as seen from front or rear) |
| D. | Creates a standing wave |
| Answer» D. Creates a standing wave | |
| 105. |
An oil filter bypass valve opens when the |
| A. | Engine is cold |
| B. | Engine overheats |
| C. | Oil filter becomes clogged |
| D. | Engine runs at high speed |
| Answer» D. Engine runs at high speed | |
| 106. |
The main feature of Macpherson strut suspension is that |
| A. | The vertical size of the suspension can be made more compact |
| B. | Non vertical external forces are supported by the suspension arms |
| C. | The unsprung mass in lighter |
| D. | The assembly is slightly more complicated in design |
| Answer» C. The unsprung mass in lighter | |
| 107. |
The advantage of the fuel injection system over the carburettor system is |
| A. | Improved fuel efficiency |
| B. | Improved emission |
| C. | Improved power output |
| D. | All of these |
| Answer» E. | |
| 108. |
The octane number of compressed natural gas (CNG) is |
| A. | 90 |
| B. | 100 |
| C. | 110 |
| D. | 120 |
| Answer» E. | |
| 109. |
In vehicles with tilt steering, the steering column is pivoted in |
| A. | Upper bracket |
| B. | Lower bracket |
| C. | Tilt bracket |
| D. | Steering yoke joint |
| Answer» C. Tilt bracket | |
| 110. |
The temperature at which tyre inflation pressure should be checked is |
| A. | 20°C |
| B. | 25°C |
| C. | 35°C |
| D. | Ambient temperature |
| Answer» E. | |
| 111. |
In a Diesel engine, the fuel is ignited by |
| A. | An electric spark |
| B. | The heat of compression |
| C. | The hot exhaust |
| D. | None of these |
| Answer» C. The hot exhaust | |
| 112. |
With the increase of battery temperature, the specific gravity of electrolyte |
| A. | Increases |
| B. | Decreases |
| C. | Remains the same |
| D. | None of these |
| Answer» C. Remains the same | |
| 113. |
The advantage of a tubeless tyre over tube type tyre is |
| A. | Slow air leakage |
| B. | Better fuel efficiency |
| C. | Less chances of running flat |
| D. | All of these |
| Answer» E. | |
| 114. |
Which of the following parameter can be adjusted by modifying the tie rod attachment length? |
| A. | Camber |
| B. | Caster |
| C. | Toe |
| D. | Steering gear ratio |
| Answer» D. Steering gear ratio | |
| 115. |
The auto ignition in a spark ignition engine means |
| A. | Automatic ignition of the charge at the end of compression |
| B. | Ignition induced by the passage of a spark |
| C. | Ignition of the charge before the passage of flame front |
| D. | Ignition induced to supplement the process of normal combustion |
| Answer» D. Ignition induced to supplement the process of normal combustion | |
| 116. |
Valve overlap is the number of degrees of camshaft rotation during which |
| A. | Both valves are closed |
| B. | Both valves are open |
| C. | Both 'A' and 'B' |
| D. | None of these |
| Answer» C. Both 'A' and 'B' | |
| 117. |
When the top of the wheel is tilted outward, then it is called |
| A. | Positive camber |
| B. | Negative camber |
| C. | Positive caster |
| D. | Negative caster |
| Answer» B. Negative camber | |
| 118. |
The connecting rod is attached to the piston by the |
| A. | Cap bolt |
| B. | Piston pin |
| C. | Cap roller bearing |
| D. | Rod cap |
| Answer» C. Cap roller bearing | |
| 119. |
If the valve clearances are excessively large, the problem that can arise is |
| A. | Overheating of the engine |
| B. | Incomplete valve closure |
| C. | Fouling of spark plug by gasoline |
| D. | None of these |
| Answer» C. Fouling of spark plug by gasoline | |
| 120. |
The specific gravity of acid in a fully charged battery is generally |
| A. | 1.00 |
| B. | 1.28 |
| C. | 1.82 |
| D. | 2.81 |
| Answer» C. 1.82 | |
| 121. |
The reconditioning process used to give cylinder bore surfaces a crosshatch pattern, is known as |
| A. | Honing |
| B. | Porous plating |
| C. | Boring |
| D. | Shot peening |
| Answer» B. Porous plating | |
| 122. |
Cushioning springs in clutch plate reduces |
| A. | Vehicle speed |
| B. | Torsional vibrations |
| C. | Jerky starts |
| D. | None of these |
| Answer» D. None of these | |
| 123. |
A three way catalytic converter |
| A. | Re-circulates exhaust gases |
| B. | Burns fuel vapour gases |
| C. | Reduces N₂, H₂O, and CO₂ emission levels |
| D. | Removes CO, HC, and NO₂ from the exhaust gases passing through it |
| Answer» E. | |
| 124. |
Which of the following is not a part of the chassis? |
| A. | Wheels |
| B. | Front axle |
| C. | Steering system |
| D. | Seats |
| Answer» E. | |
| 125. |
When a gear box has four forward speeds and one reverse speed, it is said to be a |
| A. | 3-speed gear box |
| B. | 4-speed gear box |
| C. | 5-speed gear box |
| D. | 6-speed gear box |
| Answer» C. 5-speed gear box | |
| 126. |
Which part of the automobile tyre is subjected to greatest flexing action? |
| A. | Bead |
| B. | Side wall |
| C. | Shoulder |
| D. | Tread |
| Answer» C. Shoulder | |
| 127. |
The air resistance to a car at 20 kmph is R. The air resistance at 40 kmph will be |
| A. | R |
| B. | 2R |
| C. | 4R |
| D. | 4R² |
| Answer» D. 4R² | |
| 128. |
The basic purpose of a four wheel drive (4WD) system is that it |
| A. | Delivers improved cornering on dry road surfaces |
| B. | Eliminates the need of snow tyres, tyre chains, etc. |
| C. | Ensures effective transmission of engine torque to all four wheels, even on slippery road surfaces |
| D. | Ensures that effective braking can be performed, even on slippery surfaces |
| Answer» D. Ensures that effective braking can be performed, even on slippery surfaces | |
| 129. |
The function of positive crankcase ventilation (PCV) system is that it |
| A. | Mixes fuel with air |
| B. | Promotes combustion by creating a swirling movement in the air-fuel mixture |
| C. | Returns blow by gases from the crankcase to the intake system |
| D. | Feeds blow by gases to the exhaust manifold |
| Answer» D. Feeds blow by gases to the exhaust manifold | |
| 130. |
Damper is also known as |
| A. | Shock absorber |
| B. | Torsion bar |
| C. | Spring |
| D. | Radius rod |
| Answer» B. Torsion bar | |
| 131. |
The characteristic that is enhanced by the honing of cylinder sleeves inner surface is |
| A. | Cooling efficiency |
| B. | Resistance to wear |
| C. | Lubrication performance |
| D. | None of these |
| Answer» D. None of these | |
| 132. |
In Diesel engines, during suction stroke, _________ is drawn in the cylinder. |
| A. | Air and fuel |
| B. | Only fuel |
| C. | Only air |
| D. | None of these |
| Answer» D. None of these | |
| 133. |
The fuel pump in the programmed fuel injection (PFI) system is located |
| A. | Between the fuel filler pipe and fuel tank |
| B. | In the fuel tank |
| C. | On the distributor mounting in the engine compartment |
| D. | On the engine compartment bulkhead |
| Answer» C. On the distributor mounting in the engine compartment | |
| 134. |
In a forced feed lubrication system, the device used to guard against excessive oil pressure, is known as |
| A. | Release chamber |
| B. | Balancer |
| C. | Relief valve |
| D. | Stop valve |
| Answer» D. Stop valve | |
| 135. |
The information provided by the oxygen (O₂) sensor to the feedback control system is about the |
| A. | Air-fuel ratio |
| B. | Air temperature |
| C. | Air flow speed |
| D. | Exhaust gas volume |
| Answer» B. Air temperature | |
| 136. |
The fuel pump of a programmed fuel injection (PFI) system operate for two seconds when the ignition is turned to the start position to |
| A. | Enable the pump's fault diagnosis function to operate |
| B. | Warm up and lubricate the pump |
| C. | Supplies a large amount of fuel and thereby creates a choke effect |
| D. | Pressurise the fuel system before the engine is started |
| Answer» E. | |
| 137. |
The main function of an exhaust muffler is the |
| A. | Optimization of exhaust efficiency |
| B. | Reduction of exhaust noise |
| C. | Reduction of nitrogen oxide in the exhaust gases |
| D. | Reduction of the exhaust gas volume |
| Answer» C. Reduction of nitrogen oxide in the exhaust gases | |
| 138. |
The most effective method of controlling S.I. engine exhaust emission is by |
| A. | Recirculating exhaust |
| B. | Using catalytic converter |
| C. | Using some additives in the fuel |
| D. | None of these |
| Answer» C. Using some additives in the fuel | |
| 139. |
The engine oil level should be checked |
| A. | Immediately after the ignition switch is turned off |
| B. | While the engine is running |
| C. | A few minutes after the ignition switch is turned off |
| D. | While the engine is running at high idle speed |
| Answer» D. While the engine is running at high idle speed | |
| 140. |
The basic purpose of tyres is to |
| A. | Grip the road and provide good traction |
| B. | Substitute for springs |
| C. | Act as brake |
| D. | None of these |
| Answer» B. Substitute for springs | |
| 141. |
The crankcase dilution means |
| A. | Dilution of fuel in the crankcase |
| B. | Dilution of oil by water in the crankcase |
| C. | Dilution of lubrication oil by fuel in the crankcase |
| D. | Dilution of mixture passing through crankcase in two stroke engines |
| Answer» D. Dilution of mixture passing through crankcase in two stroke engines | |
| 142. |
In case of a Diesel car, the pressure at the end of compression is of the order of |
| A. | 15 bar |
| B. | 25 bar |
| C. | 35 bar |
| D. | 45 bar |
| Answer» E. | |
| 143. |
The caster is called positive when the top of the king pin is inclined to the |
| A. | Rear of the vehicle |
| B. | Front of the vehicle |
| C. | Left of the vehicle |
| D. | Right of the vehicle |
| Answer» B. Front of the vehicle | |
| 144. |
The boiling point of Diesel fuel is in the range of |
| A. | 70°C to 100°C |
| B. | 100°C to 120°C |
| C. | 120°C to 180°C |
| D. | 180°C to 360 °C |
| Answer» E. | |
| 145. |
The compression ratio for Diesel engines usually lies in the range of |
| A. | 6-10 |
| B. | 10-15 |
| C. | 15-25 |
| D. | 25-40 |
| Answer» D. 25-40 | |
| 146. |
In a petrol engine, the high voltage for spark plug is in the order of |
| A. | 1000 volts |
| B. | 2000 volts |
| C. | 11 kilovolts |
| D. | 22 kilovolts |
| Answer» E. | |
| 147. |
The lubrication oil flow in an engine is in the order as |
| A. | Oil strainer, oil pump, relief valve, oil filter, cylinder block, cylinder head and oil pan |
| B. | Oil pump, oil strainer, relief valve, oil filter, cylinder block, cylinder head and oil pan |
| C. | Oil strainer, oil filter, relief valve, oil pump, cylinder block, cylinder head and oil pan |
| D. | Oil strainer, oil pump, relief valve, oil filter, cylinder head, cylinder block and oil pan |
| Answer» B. Oil pump, oil strainer, relief valve, oil filter, cylinder block, cylinder head and oil pan | |
| 148. |
The rigid suspension is beneficial when |
| A. | It is desired to reduce the unsprung mass |
| B. | It is desired to have more flexibility in design |
| C. | It is desired to improve tyre to ground contact characteristics |
| D. | Large changes in load make it necessary to have a large suspension stroke |
| Answer» E. | |
| 149. |
In a single dry plate clutch, torsional vibrations are absorbed by |
| A. | Coil springs known as torsional springs |
| B. | Cushion springs |
| C. | Central hub |
| D. | Clutch pedal |
| Answer» B. Cushion springs | |
| 150. |
The brake warning light warns the driver of |
| A. | Water in the master cylinder |
| B. | Air in the hydraulic system |
| C. | Failure of the primary or secondary circuit of hydraulic system |
| D. | Power brake failure |
| Answer» D. Power brake failure | |