MCQ on Boiler

MCQ on Boiler

1-In which the following regions of a boiler would you find the highest temperature of flue gas?

(A) Economizer

(B) Air Preheater

(C) Boiler Drum

(D) Superheater

 

2-Based on flue gas flow the boiler bank types are possible:

(A) Single-pass cross flow

(B) Multipass cross flow

(C) Multipass longitudinal flow

(D) All are possible

 

3-In which of the following units can a boiler’s rating be described?

(A) kg of steam generated at specified pressure and temperature

(B) MW of turbine capacity

(C) Kcal/hour (Rate of heat generation in furnace)

(D) All of the above

 

4-The ratio of mass rate of water feeding to the steam-generating tubes to the mass flow rate of generated steam is defined as

(A) Steam generation ratio

(B) Circulation ratio

(C) Turndown ratio

(D) Evaporation ratio

 

5-The Circulation ratio for once through steam boilers is

(A) Greater than 1

(B) Less than one

(C) Unity

(D) Can take any value depending on type of circulation employed

 

6-Which of the following will be ideal for heat transfer in a heat exchanger

(A) Superheated steam

(B) Saturated dry steam

(C) Wet steam

(D) Hot water

 

7-High pressure boilers are always

(A) Bottom supported

(B) Top supported

(C) Can be supported from either

(D) None of the above

 

8-Which of the following is the most suitable candidate to act as Emergency Shutdown valve?

(A) Gate Valve

(B) Globe Valve

(C) Butterfly Valve

(D) Both (A) and (C)

 

9-Following is centrifugal separation device used in steam drum

(A) Turbo separators

(B) Baffle plates

(C) Screen tubes

(D) All of the above

 

10-To drain condensate from main steam line, the following type of trap is a suitable trap.

(A) Float

(B) Bimetallic

(C) Thermodynamic

(D) None of the above

 

ANSWERS:

1-(D), 2-(D), 3-(D), 4-(B), 5-(C), 6-(B), 7-(B), 8-(C), 9-(A), 10-(C)