Controls Questions – Flashcards

question
Flame rectification devices are most commonly found on:
answer
Boilers[image]
question
The term ASD is the term used for an:
answer
Atmospheric Sensing Device
question
A device where a volatile liquid is heated to expand a bellows which in turn opens a valve to allow gas to flow is known as:
answer
Liquid expansion device
question
An open flued gas appliance that is to be installed in a bedroom or other sleeping accommodation (where the appliance heat input is under 14kW) must incorporate:
answer
An ASD
question
A thermo-electric flame failure system is a control consisting of: -
answer
A electromagnetic valve and thermocouple
question
If unsure as to the nature of a fault, e.g. At Risk, ID, what document should be consulted?
answer
The Gas Industry Unsafe Situations Procedure[image]
question
One of the following is not a gas safety device type. Which is it
answer
Flame Expansion
question
What documentation should be filled in by the installer after completing the installation?
answer
Manufacturer?s log book/benchmark
question
The maximum shut down time for a flame failure device on a hot plate is: -
answer
[image]90 seconds
question
The safety shut-off lid on the cooker should be left closed when carrying out a gas tightness test.
answer
False[image]
question
There are 4 main types of thermostat operation. Which of those below is not one of them
answer
heat conduction
question
The type of SAFETY device used to extinguish the hob burners in the event that a cooker lid is lowered is
known as
answer
a Safety Shut Off Valve[image]
question
Which flame supervision devices senses the presence of the flame not the presence of
heat:
answer
Rectification
question
Where an open flue gas fire is to be fitted in a bedroom the following conditions apply
answer
The appliance is not rated over 12.7kW Net and has a vitiation sensing device fitted.
question
What is the purpose of the bypass built into an oven thermostat
answer
To maintain a low flame at the burner when the thermostat temp is reached.
question
How would you check a gas control tap?
answer
By operating and checking for smooth operation, high and low settings and flame picture
question
What would be the effect should the flame fail when the oven thermostat says that the oven has
reached temperature ?
answer
Gas would continue to enter the oven creating an immediately dangerous situation
question
To assess the effectiveness of a thermo-electric FSD the operative should extinguish the flame:
answer
Time And listen for the click of the valve and verify the valve has closed with a blip test
question
An appliance fitted with a zero governor may require: -
answer
The use of a flue gas analyser to commission the appliance
question
What is a thermo-electric flame sensor
answer
thermocouple
question
This device will initially only permit a small amount of gas to flow to the burner. This helps prevent the
volume of gas in the oven building up to a dangerous level if the user is a little slow in getting it lit.
Once the flame is established on the burner, the phial is heated and the LIQUID inside EXPANDS. This in
turn expands a bellows (situated in the valve body), thus pushing open the gas valve to allow gas to
flow at the correct rate (High Flame)
answer
Liquid Expansion Flame Supervision Device (FSD)
question
How would you test an oven flame supervision device?
answer
By lighting and observing the flame, which must initially be low then go to high flame
question
Before a new gas appliance can be left connected to the gas supply, it should be: -
answer
Fully commissioned
question
What type of effects would suggest a faulty oven thermostat
answer
The burner flame never reduces to simmer or goes out completely
question
A Thermally sensitive vitiation sensing device incorporates within it what 2 sensing controls
answer
ASD and Interrupted Thermocouple/Overheat Stat
question
Name a common type of VSD (Vitiation Sensing Device) fitted on modern gas fires?
answer
Oxypilot (ODS)
question
Which flame supervision device is generally the slowest acting:
answer
Bi-metallic
question
Which is the most common type of flame supervision device fitted to a domestic cooker oven:
answer
Liquid/Vapour pressure
question
Which capillary type liquid expansion control allows the increase or decrease of gas flow
answer
Oven Thermostat
question
Which type of control has a capillary tube that goes from a sensor at the pilot/low flame of a boiler to
the bellows that operate a gas control
answer
Liquid Expansion Flame Supervision Device
question
Which type of liquid expansion control has a capillary tube that goes from the heat exchanger of a
boiler to the bellows where it operates a micro switch
answer
Electric Thermostat
question
What type of GAS CONTROL utilises a tapered brass plug to regulate the flow of gas to a burner:
answer
A Gas Control Tap
question
What name is given to a thermocouple, (an item which is made of dissimilar metals which produces a current when heated)    to operate a solenoid by creating an electro magnetic field
answer
A Thermo-Electric Flame failure Device
question
[image]
answer
Thermoelectric Gas Valve
question
What would be faulty if in an oven..The burner flame never reduces to simmer or goes out completely
answer
it would suggest a faulty oven thermostat.
question
What am I describing..it maintains a low flame at the burner when the thermostat temp is reached.
answer
Thermostat Bypass
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question
Flame rectification devices are most commonly found on:
answer
Boilers[image]
question
The term ASD is the term used for an:
answer
Atmospheric Sensing Device
question
A device where a volatile liquid is heated to expand a bellows which in turn opens a valve to allow gas to flow is known as:
answer
Liquid expansion device
question
An open flued gas appliance that is to be installed in a bedroom or other sleeping accommodation (where the appliance heat input is under 14kW) must incorporate:
answer
An ASD
question
A thermo-electric flame failure system is a control consisting of: -
answer
A electromagnetic valve and thermocouple
question
If unsure as to the nature of a fault, e.g. At Risk, ID, what document should be consulted?
answer
The Gas Industry Unsafe Situations Procedure[image]
question
One of the following is not a gas safety device type. Which is it
answer
Flame Expansion
question
What documentation should be filled in by the installer after completing the installation?
answer
Manufacturer?s log book/benchmark
question
The maximum shut down time for a flame failure device on a hot plate is: -
answer
[image]90 seconds
question
The safety shut-off lid on the cooker should be left closed when carrying out a gas tightness test.
answer
False[image]
question
There are 4 main types of thermostat operation. Which of those below is not one of them
answer
heat conduction
question
The type of SAFETY device used to extinguish the hob burners in the event that a cooker lid is lowered is
known as
answer
a Safety Shut Off Valve[image]
question
Which flame supervision devices senses the presence of the flame not the presence of
heat:
answer
Rectification
question
Where an open flue gas fire is to be fitted in a bedroom the following conditions apply
answer
The appliance is not rated over 12.7kW Net and has a vitiation sensing device fitted.
question
What is the purpose of the bypass built into an oven thermostat
answer
To maintain a low flame at the burner when the thermostat temp is reached.
question
How would you check a gas control tap?
answer
By operating and checking for smooth operation, high and low settings and flame picture
question
What would be the effect should the flame fail when the oven thermostat says that the oven has
reached temperature ?
answer
Gas would continue to enter the oven creating an immediately dangerous situation
question
To assess the effectiveness of a thermo-electric FSD the operative should extinguish the flame:
answer
Time And listen for the click of the valve and verify the valve has closed with a blip test
question
An appliance fitted with a zero governor may require: -
answer
The use of a flue gas analyser to commission the appliance
question
What is a thermo-electric flame sensor
answer
thermocouple
question
This device will initially only permit a small amount of gas to flow to the burner. This helps prevent the
volume of gas in the oven building up to a dangerous level if the user is a little slow in getting it lit.
Once the flame is established on the burner, the phial is heated and the LIQUID inside EXPANDS. This in
turn expands a bellows (situated in the valve body), thus pushing open the gas valve to allow gas to
flow at the correct rate (High Flame)
answer
Liquid Expansion Flame Supervision Device (FSD)
question
How would you test an oven flame supervision device?
answer
By lighting and observing the flame, which must initially be low then go to high flame
question
Before a new gas appliance can be left connected to the gas supply, it should be: -
answer
Fully commissioned
question
What type of effects would suggest a faulty oven thermostat
answer
The burner flame never reduces to simmer or goes out completely
question
A Thermally sensitive vitiation sensing device incorporates within it what 2 sensing controls
answer
ASD and Interrupted Thermocouple/Overheat Stat
question
Name a common type of VSD (Vitiation Sensing Device) fitted on modern gas fires?
answer
Oxypilot (ODS)
question
Which flame supervision device is generally the slowest acting:
answer
Bi-metallic
question
Which is the most common type of flame supervision device fitted to a domestic cooker oven:
answer
Liquid/Vapour pressure
question
Which capillary type liquid expansion control allows the increase or decrease of gas flow
answer
Oven Thermostat
question
Which type of control has a capillary tube that goes from a sensor at the pilot/low flame of a boiler to
the bellows that operate a gas control
answer
Liquid Expansion Flame Supervision Device
question
Which type of liquid expansion control has a capillary tube that goes from the heat exchanger of a
boiler to the bellows where it operates a micro switch
answer
Electric Thermostat
question
What type of GAS CONTROL utilises a tapered brass plug to regulate the flow of gas to a burner:
answer
A Gas Control Tap
question
What name is given to a thermocouple, (an item which is made of dissimilar metals which produces a current when heated)    to operate a solenoid by creating an electro magnetic field
answer
A Thermo-Electric Flame failure Device
question
[image]
answer
Thermoelectric Gas Valve
question
What would be faulty if in an oven..The burner flame never reduces to simmer or goes out completely
answer
it would suggest a faulty oven thermostat.
question
What am I describing..it maintains a low flame at the burner when the thermostat temp is reached.
answer
Thermostat Bypass
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