Automobile Engineering MCQ Questions & Answers | Mechanical Engineering

The correct answer is (B) Gear drive
Let's break down why:
* The starter motor's job is to crank (turn) the engine to get it started.
* It needs to apply a lot of torque (twisting force) to the engine's flywheel.
* Gear drives are perfect for this because they can efficiently transfer power and increase torque.
* Here's why the other options aren't as good:
* Chain drives: While strong, they're usually used for transferring power over longer distances, not inside a compact engine compartment and tend to be noisier.
* Flat belt drives: These are prone to slipping, especially under heavy load. They aren't reliable enough for starting an engine.
* V-belt drives: Similar to flat belts, they can slip, although they are generally better at transmitting power than flat belts but still not as effective as gears for starter motor application.
* In summary: Gear drives are robust, reliable, and ideal for the high torque needed to start a car engine.

Two speed reverse gear arrangements is generally provided in case of Tractors

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$$\eqalign{ & {\text{COMPRESSION RATIO}} \cr & = \frac{{{\text{CLEARANCE VOLUME}} + {\text{SWEPT VOLUME }}}}{{{\text{CLEARANCE VOLUME}}}} \cr & = \frac{{100 + 800}}{{100}} \cr & = 9:1 \cr} $$

In a square type engine Stroke length and cylinder bore are same

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The component that is responsible for converting the rotation of the steering wheel into lateral motion is the Steering gearbox