Automobile Engineering MCQs 2026

Crush zones in body structure

1. Aremain rigid transferring all force to occupant✓
2. Bdeform progressively absorbing crash energy✓
3. Conly cosmetic panels without structure✓
4. Dincrease vehicle mass unnecessarily only purpose✓

Seat belt pretensioner

1. Ainflates tyre automatically✓
2. Bchanges gear ratio✓
3. Ctightens belt instantly at crash sensing✓
4. Dopens sunroof✓

Idle air control valve regulates

1. Amaximum vehicle road speed✓
2. Bfinal drive ratio✓
3. Cpower steering gain only✓
4. Dengine idle speed bypassing throttle plate✓

Drive-by-wire throttle uses

1. Amechanical cable only always on all new cars✓
2. Bonly vacuum advance on distributor always✓
3. Celectronic pedal sensor and motor-driven throttle body✓
4. Dsand binder control✓

Traction control limits

1. Amaximum steering angle always✓
2. Bwheel spin by reducing engine torque or braking spinning wheel✓
3. Cfuel tank capacity✓
4. Dexhaust pipe length only✓

Electronic stability control ESC

1. Aapplies individual brakes and reduces torque to prevent yaw loss✓
2. Bonly increases engine power in skid always✓
3. Clocks steering column✓
4. Ddisables differential always✓

Airbag deployment triggered by

1. Asteering angle only✓
2. Blow fuel warning✓
3. Chigh engine RPM only✓
4. Daccelerometer detecting severe deceleration crash signature✓

Parallel hybrid drives wheels via

1. Aonly generator without mechanical drive always✓
2. Bonly sand conveyor✓
3. Cengine and motor through common transmission path✓
4. Donly power steering pump✓

Series hybrid engine primarily

1. Adrives generator charging battery for traction motor✓
2. Bdrives wheels mechanically always directly✓
3. Cnever runs at any speed✓
4. Dreplaces suspension springs✓

Regenerative braking in hybrid stores energy in

1. Afuel tank only✓
2. Bsand mould cavity✓
3. Chigh-voltage battery pack✓
4. Dclutch friction surface only✓

Stop-start system saves fuel by

1. Ashutting engine at idle and restarting on demand✓
2. Brunning engine faster at idle✓
3. Clocking transmission in reverse✓
4. Ddisabling brakes✓

Battery SOC in hybrid indicates

1. Astate of charge of traction battery✓
2. Bsteering column angle only✓
3. Cbrake pad wear only✓
4. Dtyre camber only✓

Inverter in hybrid electric drive converts

1. ADC battery to AC for traction motor✓
2. Bmechanical torque to sand only✓
3. Chydraulic pressure to fuel✓
4. Dexhaust to intake only✓

Crankshaft position sensor used for

1. Atyre pressure monitoring only✓
2. Bengine timing fuel injection and ignition✓
3. Cseat position memory only✓
4. Dwiper speed only✓

Oversteer occurs when

1. Afront tyres slide before rear tyres✓
2. Bvehicle never rotates in a turn✓
3. Conly straight line motion is possible✓
4. Drear wheels lose grip before front in turn✓

Understeer is when

1. Arear slides out first✓
2. Bfront tyres lose grip first and vehicle runs wide✓
3. Call wheels equally infinite grip✓
4. Dbrakes fail✓

Rolling resistance of tyre depends on

1. Aonly engine displacement✓
2. Bonly steering ratio✓
3. Ctyre construction, inflation and road surface✓
4. Donly catalytic metal only✓

Aerodynamic drag force increases approximately with

1. Asquare of vehicle speed✓
2. Blinearly with speed only always✓
3. Cinversely with speed✓
4. Dindependent of frontal area always✓

Power to weight ratio affects

1. Aonly paint colour✓
2. Bacceleration performance of vehicle✓
3. Conly wiper blade length✓
4. Donly sand grain size✓

Tubeless tyre seals air with

1. Ainner tube always required✓
2. Brubber liner and bead seal against rim✓
3. Csand filling✓
4. Dhydraulic fluid✓

Radial ply tyre construction has

1. Acords at 90 degrees to travel direction in carcass✓
2. Bonly bias diagonal plies always✓
3. Cno steel belts ever✓
4. Dsolid rubber without air✓

Wheel alignment after suspension work adjusts

1. Aengine valve timing only✓
2. Bfuel injector pulse width only✓
3. Csand moisture only✓
4. Dcamber caster and toe to specification✓

Torque converter transmits power through

1. Afluid between pump, turbine and stator✓
2. Bdirect mechanical lock only always from start✓
3. Csand friction material only✓
4. Dgear hobbing only✓

Automatic transmission typically uses

1. Aonly manual dog clutch always✓
2. Bonly belt CVT exclusively always✓
3. Cno hydraulic control ever✓
4. Dplanetary gear sets and torque converter✓