During shutdown, oil heater pilots and main burners are checked for

During shutdown, oil heater pilots and main burners are checked for

a) setting
b) temperature
c) pressure
d) cleanliness
e) flame pattern




Answer: D

It is important to drain an hot oil heater prior to attempting a radiographic inspection, because

It is important to drain an hot oil heater prior to attempting a radiographic inspection, because

a) oil and coke appear similar on the x-ray picture
b) oil and coke give a similar sound when the tube is hammered
c) x-rays passing through the oil might cause an explosion
d) drained tubes are cleaner for the radiologist to work with
e) it is safer




Answer: A

Coke deposits on the inner walls of a heater tube produce __________ when the tube is tapped lightly with a hammer?

Coke deposits on the inner walls of a heater tube produce __________ when the tube is tapped lightly with a hammer?

a) a clear ringing tone
b) a dull sound
c) chimes
d) a vibrating sound
e) a whistling sound




Answer: B

In order not to be harmful to the metals used in hot oil systems the thermal fluid must

In order not to be harmful to the metals used in hot oil systems the thermal fluid must

a) be kept at a low temperature
b) have a neutral pH value
c) be noncorrosive
d) be diluted with glycol
e) be mixed with kerosene




Answer: C