Which of the following flame supervision devices senses the presence of the flame not the presence of heat?
Phase4Mod11devices

Quiz
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Science
•
Professional Development
•
Hard

Craig Boothright
Used 4+ times
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10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Thermo-electric.
Bi-metallic.
Liquid expansion.
Rectification.
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
A vitiation sensing device works on the principle of:
A flame cooling in a vitiated atmosphere.
A flame lifting in a vitiated atmosphere.
A flame lighting in a vitiated atmosphere.
A flame extinguishing in a vitiated atmosphere.
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
The flame supervision device fitted to a gas fire must close upon flame failure within a minimum time period of:
1 minute
2 minute
3 minute
4 minute
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What type of lubricant should be used when serving gas taps?
Molybdenum desulphated grease
High temperature silicone grease.
Carb-hydroxy grease.
Low-modulus fungicidal silicone grease.
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which of the following flame supervision devices is generally the slowest acting?
Thermo-electric.
Bi-metallic.
liquid expansion.
Rectification.
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the likely fault if a cooker oven burner extinguished after a period of approximately 15 minutes?
Faulty flame supervision device.
Blocked oven injectors.
Blocked oven thermostat by-Pass.
Under gassing causing incomplete combustion.
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
To assess the effectiveness of a thermo-electric FSD, the operative should extinguish the flame:
And listen for the click of the valve.
And listen for the click of the valve and verify the valve has closed using a pressure gauge.
And wait for the appliance governor to lock up.
And calculate the gas rate.
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