Top Most Automobile Engineering interview question answer

 Automobile Engineer most relevant interview question answer

What is a catalyst ?

Catalyst is a chemical substance which increases the rate of chemical reaction. Examples are Platinum, Palladium and Rhodium.

 Why are the side of the frame upswept at two places?

 The frame is upswept at the rear and front to accommodate the movement of the axles due to springing. It also keeps the chassis height low.

What is the function of a bumper?

A bumper is the front-most or rear-most part, which is designed to allow the vehicle to sustain an impact without damage to the vehicle’s safety systems

Name few components of engine.

• Cylinder head
• Crankcase
• Cylinder

• Piston

• Connecting rod

• Crankshaft

• Camshaft

• Valves

• Spark plug (in the case of petrol engine)

• Fuel injector (in the case of diesel engine)

What is meant by self-propelled vehicle?

A self propelled vehicle is known as an “Automobile”

State the major types of automobiles according to the fuel used.

 Petrol Engines (SI engines)

• Diesel Engines (CI engines)
• Gas Engines (either SI or CI mode)

How automobiles are classified into different types?

 Based on Make & Model

• Based on Fuel
• Based on Body Style
• Based on No. of Wheels
• Based on Drive
• Based on Transmission

What are the two types of piston rings?

• Compression rings
• Oil rings

What are the advantages of air-cooled engines?

• Less weight-power ratio
• Does not require radiator and water pump
• No antifreeze agents required
• No salt and mud deposits in the system
• Air cooled engines are cheaper

What is the function of piston, connecting rod, crank shaft and cylinder head?

• Piston – The piston assembly transfers the force from the power stroke to the crankshaft
• Connecting rod – converts reciprocating motion of piston into rotary motion of crankshaft
• Cylinder head – it acts as a top cover to the cylinder block. The valves are placed in the cylinder head in an overhead valve engine.

What is the purpose of cooling system?

The purpose of cooling system is to cool the engine components in order to keep their temperature below certain limit and thereby avoiding excessive thermal stress in those components.

What is the purpose of lubricating system? State its types.

The purpose of lubrication system is to supply the lubricating oil between the moving parts of the engine in order to

1. Reduce the friction
2. Provide the cooling effect
3. carry away the deposits formed due to wear and tear.

Types: –

• Mist lubrication
• Splash lubrication
• Pressure feed lubrication
• Combined splash & pressure feed lubrication.