Chapter 106

Question 0

A flame failure device:
A) must be installed on every high pressure boiler
B) will shut off the steam leaving the boiler
C) will control the pressure of the boiler
D) will shut off the fuel to the burner

Answer 0

D) will shut off the fuel to the burner

Question 1

Flame rods:
A) are not affected by deposits of carbon
B) should not be exposed to temperatures above 100 degrees C
C) should shut off the fuel within four seconds of flame failure
D) require frequent filing of electrical contacts to prevent corrosion build-up and failure of the device

Answer 1

C) should shut off the fuel within four seconds of flame failure

Question 2

The outer sheath of a thermocouple used with a pilot burner is made of:
A) copper
B) nickel
C) aluminum
D) molybdenum

Answer 2

A) copper

Question 3

Which of the following is not a device used in measuring the presence of a flame in a boiler?
A) thermocouple
B) ultraviolet scanner
C) flame rod
D) thermostat

Answer 3

D) thermostat

Question 4

A photocell flame detection device is often called a:
A) thermocouple
B) scanner
C) flame rod
D) thermistor

Answer 4

B) scanner

Question 5

The maximum temperature for a lead sulphide scanner is:
A) 35*C
B) 65*C
C) 75*C
D) 50*C

Answer 5

D) 50*C