UNIT II AUTOMOBILE ENGINEERING

The function of induction system of spark ignition engine is to supply ______ to various cylinders of the engine

• Partly vaporized mixture of fuel and air

• Fully vaporized mixture of fuel and air

• Liquified mixture of fuel and air

• All of the above

The following factors affect the process of carburetion

• Engine speed

• The temperature of the incoming air

• The volatility of fuel

• All of the above

Which of the following air-fuel ratio is considered as rich mixture in spark ignition engine?

• Below 11:1

• Below 15:1

• Below 20:1

• Above 20:1

At high altitudes, the automobile requires

• Rich mixture

• Lean mixture

• Correct mixture

• Any of the above

MPFI stands for

• Multi-point fuel injection

• Multi-port fuel injection

• Manifold point fuel injection

• Manifold port fuel injection

Which of the following is the part of Electronic Control Unit (ECU)

• Injector control

• Spark advance control

• Idling control

• All of the above

In battery-coil ignition system, the correct sequence of flow of current is

• Battery – Ammeter – Ignition coil - Distributor – Spark plug

• Battery – Ignition coil – Ammeter - Distributor – Spark plug

• Battery – Ammeter – Distributor - Ignition coil – Spark plug

• Battery – Distributor – Ammeter - Ignition coil – Spark plug

In ignition coil, the ratio between the number of turns of primary and secondary winding is about

• 1 to 50

• 1 to 100

• 1 to 200

• 1 to 400

The distributor serves the following purposes in the ignition system

• It operates break and make mechanism

• It distributes high tension current to spark plug at correct time

• Both a and b

• None of the above

The drive shaft in distributor is rotated at _______ the engine speed in four stoke engine

• Half

• Equal to

• One and half times

• Double