Chapter 4

Question 1

Furnace baffles are constructed of:
A) Alloy steel
B) Steel waterwalls
C) Lagging
D) Refractory material

Answer 1

D

Question 2

A welded fin tube wall is:
A) Very heavy
B) Gas tight
C) Water tight
D) Surrounded by refractory

Answer 2

B

Question 3

The purpose of the superheater is to:
A) Heat the condensate
B) Superheat the flue gases in the boiler
C) Superheat the boiler feedwater
D) Raise the temperature of the steam generated in the boiler above the saturation temperature

Answer 3

D

Question 4

Attemperators and desuperheaters are used to:
A) control the temperature of superheated steam
B) control the temperature of wet steam
C) control feedwater temperature to the boiler
D) control the temperature of saturated steam

Answer 4

A

Question 5

A Convection superheater has (a):
A) No effect on steam temperature
B) No PSV
C) falling steam temperature characteristic
D) rising steam temperature characteristic

Answer 5

D

Question 6

Combination superheaters have:
A) rising steam temperature characteristics
B) No PSV
C) a steady steam temperature
D) falling steam temperature characteristics

Answer 6

C

Question 7

A reheater receives steam that has been:
A) Expanded through part of the steam turbine
B) Through the boiler
C) Though the feed water heater
D) Though the superheater

Answer 7

A

Question 8

The economizer is used to:

A) Heat the fuel going to the boiler
B) Heat the feedwater going to the boiler
C) Heat the condensate leaving the turbine
D) Reheat the steam leaving the boiler

Answer 8

B

Question 9

Two types of recuperative air heaters are?
A) Plate and revolving
B) Plate and tubular
C) Revolving and tubular
D) Rotating and Plate

Answer 9

B

Question 10

To prevent corrosion in the air heater the temperature must kept above the:
A) Condensing temperature of Sulphur trioxide
B) Dew point of water vapor
C) Boiling point of water
D) Condensing temperature of Sulphur dioxide

Answer 10

B