MICROBIAL GENETICS QUIZ

The brake power is the power available

In the engine cylinder

None of these

At the crank pin

At the crank shaft

TRUE ANSWER : ?
YOUR ANSWER : ?

If the temperature of intake air in internal combustion engine increases, then its efficiency will

Increase

Remain same

None of the listed here

Decrease

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following fuel has little tendency towards detonation?

Benzene

Iso-octane

Alcohol

Normal heptane

TRUE ANSWER : ?
YOUR ANSWER : ?

The working cycle in case of four stroke engine is completed in following number of revolutions of crankshaft

1

43832

2

4

TRUE ANSWER : ?
YOUR ANSWER : ?

In the crankcase method of scavenging, the air pressure is produced by

Natural aspirator

Centrifugal pump

Supercharger

Movement of engine piston

TRUE ANSWER : ?
YOUR ANSWER : ?

Polymerization is a chemical process in which molecules of a compound become

Liquid

Larger

Smaller

Slowed down

TRUE ANSWER : ?
YOUR ANSWER : ?

Diesel fuel, compared to petrol is

Less difficult to ignite

More difficult to ignite

Highly ignitable

Just about the same difficult to ignite

TRUE ANSWER : ?
YOUR ANSWER : ?

Diesel engine can work on very lean air fuel ratio of the order of 30: 1. A petrol engine can also work on such a lean ratio provided

Cannot work as it is impossible

Best quality fuel is used

It is properly designed

Flywheel size is proper

TRUE ANSWER : ?
YOUR ANSWER : ?

Fuel consumption of diesel engines is not guaranteed at one quarter load because at such low loads

The friction is unpredictable

The engine is rarely operated

The small difference in cooling water temperature or in internal friction has a disproportionate effect

The friction is high

TRUE ANSWER : ?
YOUR ANSWER : ?

Iso-octane (Câ‚ˆHâ‚â‚ˆ) has octane number of

100

120

50

TRUE ANSWER : ?
YOUR ANSWER : ?

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