STEAM BOILERS, ENGINES, NOZZLES AND TURBINES QUIZ

The air pressure at the fuel bed is reduced below that of atmosphere by means of a fan placed at or near the bottom of the chimney to produce a draught. Such a draught is called

Balanced draught

Induced draught

Forced draught

Natural draught

TRUE ANSWER : ?
YOUR ANSWER : ?

Reheating of steam in a turbine

Increases the work-done through the turbine

Increases the efficiency of the turbine

All of these

Reduces wear on the blades

TRUE ANSWER : ?
YOUR ANSWER : ?

The radius of a dished head is taken approximately as

Two

One

Half

One fourth

TRUE ANSWER : ?
YOUR ANSWER : ?

The effect of super-saturation is that the

All of these

Mass of the steam discharged increases

Entropy and specific volume of the steam increases

Exit velocity of steam reduces

TRUE ANSWER : ?
YOUR ANSWER : ?

Which of the following boiler is best suited to meet the fluctuating demand of steam?

Locomotive boiler

Cornish boiler

Babcock and Wilcox boiler

Lancashire boiler

TRUE ANSWER : ?
YOUR ANSWER : ?

The pressure compounded impulse turbine as compared to velocity compounded turbine require __________ number of stages.

Less

None of these

More

Same

TRUE ANSWER : ?
YOUR ANSWER : ?

An air preheater is installed

None of these

Before the economiser

Between the economiser and chimney

Before the superheater

TRUE ANSWER : ?
YOUR ANSWER : ?

The specific heat of superheated steam in kcal/kg is generally of the order of

0.8

0.5

0.3

0.1

TRUE ANSWER : ?
YOUR ANSWER : ?

The pressure of reheat steam after passing through reheater compared to inlet condition is

Equal

Less

May be more or less depending on capacity of reheater

More

TRUE ANSWER : ?
YOUR ANSWER : ?

The three "Ts" for good combustion are

Total air, time, and temperature

Total air, true fuel, and turbulence

Temperature, time, and turbulence

Thorough mixing, total air and temperature

TRUE ANSWER : ?
YOUR ANSWER : ?

↑