Gas Controls

the device pictured is

• thermostat

• thermocouple

• thermistor

• thermo-elecrtic valve

the device pictured is

• thermistor

• thermo -electric valve

• solenoid valve

• liquid sensing valve

the device shown would typically incorporate

• regulator, solenoid valve, piezo igniter

• thermo electric valve, solenoid valve, regulator

• solenoid valve, thermistor, regulator

• thermistor, thermo electric valve, solenoid valve

If the gas supply fails, The flame supervision device on most appliances should fail to a safe position within

• 30 seconds

• 60 seconds

• 90 seconds

• 180 seconds

the device pictured shows a

• vitiation sensing device

• thermocouple interrupter device

• flame rectification device

• mechanical thermostat

the component shown is a gas cut off device for a

• boiler

• cooker

• fire

• water heater

the device pictured is a

• thermo electric FSD

• liquid expansion FSD

• Vitiation sensing device

• boiler thermostat

the device shown is a

• gas cooker governor

• gas boiler regulator

• meter governor

• liquid expansion FSD

If a tip of a thermocouple becomes damaged or its connection with the thermoelectric device is loose, what may be the outcome?

• the pilot light will not stay lit

• the appliance will override the fault

• the overheat device will operate

• gas will escape from the pilot assembly

A temperature sensing device with a liquid expansion phial activates an electrical switch. This describes a

• thermistor

• mechanical thermostat

• liquid expansion FSD

• thermo electric valve