STEAM BOILERS, ENGINES, NOZZLES AND TURBINES QUIZ

The water tubes in a Babcock and Wilcox boiler are

Vertical

Horizontal and inclined

Inclined

Horizontal

TRUE ANSWER : ?
YOUR ANSWER : ?

The numbers of fire tubes in a Cochran boiler are

115

165

225

75

TRUE ANSWER : ?
YOUR ANSWER : ?

The radius of a dished head is taken approximately as

Half

Two

One

One fourth

TRUE ANSWER : ?
YOUR ANSWER : ?

The feed check valve is used in order to

Regulate flow of boiler water

Check level of water in boiler drum

Allow high pressure feed water to flow to drum and not allow reverse flow to take place

Recirculate unwanted feed water

TRUE ANSWER : ?
YOUR ANSWER : ?

The turbine blades are

Circular

None of these

Straight

Curved

TRUE ANSWER : ?
YOUR ANSWER : ?

An air preheater is installed

Between the economiser and chimney

Before the superheater

None of these

Before the economiser

TRUE ANSWER : ?
YOUR ANSWER : ?

When the speed of the engine is controlled by means of a valve in a steam pipe, which regulates the pressure of steam entering the engine, then the governing is known as

Throttle governing

Cut-off governing

By-pass governing

None of these

TRUE ANSWER : ?
YOUR ANSWER : ?

Mechanical equivalent of heat for 1 kcal or Joule's equivalent is equal to

421 kg.m

421 kg.m

102 kg.m

539 kg.m

TRUE ANSWER : ?
YOUR ANSWER : ?

The latent heat of steam with increase of pressure

Increases

Remain same

Behaves unpredictably

Decreases

TRUE ANSWER : ?
YOUR ANSWER : ?

When the back pressure of a nozzle is below the designed value of pressure at exit of nozzle, the nozzle is said to be

Choked

None of these

Under-damping

Over-damping

TRUE ANSWER : ?
YOUR ANSWER : ?

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