Steam Boilers Module 15 Session 12

Question 1

Deposits of calcium and magnesium carbonates on the boiler heating surface cause \_\_\_\_\_\_\_\_\_\_\_\_.
A. Scale
B. Oxygen pitting
C. Caustic embrittlement
D. Carryover

Answer 1

A. Scale

Question 2

Priming is dangerous and could lead to \_\_\_\_\_\_\_\_\_\_\_\_ hammer.
A. Steam
B. Water
C. Gas
D. Air

Answer 2

B. Water

Question 3

Small amounts of water that leave the boiler with the steam is called \_\_\_\_\_\_\_\_\_\_\_\_.
A. Superheated steam
B. Saturated steam
C. Carryover
D. Condensate

Answer 3

C. Carryover

Question 4

Closer control of boiler water chemical concentrations is maintained by ____________.
A. Surface blowdowns
B. Bottom blowdowns
C. A combination of surface and bottom blowdowns
D. Continuous blowdowns

Answer 4

D. Continuous blowdowns

Question 5

Cracking of the boiler metal along the seams and tube ends is caused by \_\_\_\_\_\_\_\_\_\_\_\_.
A. scale
B. Oxygen pitting
C. Caustic embrittlement
D. Carryover

Answer 5

C. Caustic embrittlement

Question 6

Scale buildup on the water side of a steam boiler is caused by ____________.
A. An impure water supply
B. Scale in the raw Water
C. Improper boiler water treatment
D. Scale is found only on the fire side of a boiler

Answer 6

C. Improper boiler water treatment

Question 7

A direct cause of overheating of the boiler tubes is \_\_\_\_\_\_\_\_\_\_\_\_.
A. Soot formation
B. Overfiring
C. Insufficient air
D. Scale formation on the tubes

Answer 7

D. Scale formation on the tubes

Question 8

Boiler water having high alkalinity could develop \_\_\_\_\_\_\_\_\_\_\_\_.
A. Scale
B. Oxygen pitting
C. Caustic embrittlement
D. Warping

Answer 8

C. Caustic embrittlement

Question 9

Oxygen in the boiler will cause \_\_\_\_\_\_\_\_\_\_\_\_.
A. Scale
B. Pitting of boiler metal
C. Caustic embrittlement
D. Carryover

Answer 9

B. Pitting of boiler metal

Question 10

The cold lime-soda process softens the boiler water at \_\_\_\_\_\_\_\_\_\_\_\_.
A. Temperatures of 212°F or above
B. Ambient temperature
C. Temperatures below 32°F
D. A high, controlled pressure

Answer 10

B. Ambient temperature

Question 11

The hot lime-soda process is performed above \_\_\_\_\_\_\_\_\_\_\_\_.
A. 180 °F
B. 212 °F
C. 250 °F
D. 298 °F

Answer 11

B. 212 °F

Question 12

The ion exchange (Zeolite) process is performed at ____________ temperature.
A. Ambient
B. A low
C. A high

Answer 12

A. Ambient

Question 13

Automatic blowdown systems are limited to a maximum of \_\_\_\_\_\_\_\_\_\_\_\_ and 250 psig.
A. 298 °F
B. 354 °F
C. 368 °F
D. 392 °F

Answer 13

No Answer

Question 14

The frequency of blowing down a steam boiler is best ascertained by the \_\_\_\_\_\_\_\_\_\_\_\_.
A. Chief engineer
B. Boiler inspector
C. Daily testing of boiler water
D. Plant load

Answer 14

C. Daily testing of boiler water