Chapter 104

Question 0

A small steam heating boiler with a combination low-water cutoff and feedwater control must, by code, have a second, dedicated:
A) feedwater pump
B) gauge glass
C) low-water cutoff
D) feedwater control valve
E) condensate return line

Answer 0

C) low-water cutoff

Question 1

The cut-off switch opens and cuts off power to the fuel valve when the boiler level in the glass shows at least \_\_\_\_ of water
A) 10mm
B) 20mm
C) 5 mm
D) 40 mm

Answer 1

B) 20mm

Question 2

In some unattended heating boilers the low-water cutoff also helps maintain water level by opening a/an \_\_\_\_\_ before low water level is reached. 
A) electric feeder valve
B) second feed pump
C) blowdown valve
D) auxiliary feed line
E) feedwater bypass

Answer 2

A) electric feeder valve

Question 3

In a well balanced steam system with condensate return:
A) steam produced equals condensate returned
B) condensate returns always exceeds steam produced
C) steam produced must be greater than condensate returned
D) the condensate receiver requires fresh water makeup
E) the condensate receiver requires regular blowdown

Answer 3

A) steam produced equals condensate returned

Question 4

In a heating plant with multiple boilers:
A) a single low-water cutoff serves all boilers simultaneously
B) the water level is controlled independently in each boiler
C) all boilers must be in service at the same time
D) the boiler with the highest water level controls the feedwater pump
E) low water cutoffs are not necessary, due to redundant boilers

Answer 4

B) the water level is controlled independently in each boiler