Gas Controls Quiz

Which electromechanical device automatically opens a valve when a circuit is made and then closes itself when the circuit is broken?

• Solenoid valve

• Thermocouple

• Flame rectification supervision device

• Safety shut-off valve

Fill in the missing word: ‘A mechanical thermostat works by moving a valve using the expansion and contraction of … to control the supply of gas to an appliance to limit specific temperature levels.’

When a lack of oxygen is present a device which shuts off the pilot and the main gas valve is called a(n):

• Flame rectification supervision device

• Solenoid valve

• Thermocouple

• Vitiation sensing device

A thermoelectric flame supervision device performs which of the following?

• Shuts off the gas supply when the flame is extinguished

• Monitors the presence of a flame

• Both A and B

• None of the above

A device designed to cut off the gas supply to an appliance by the use of a flame acting by expanding or vaporising a liquid is a:

• Solenoid valve

• Thermocouple

• Vapour pressure flame supervision device

• Safety shut-off valve

A device which uses an AC current passed through a flame to produce a rectified DC current to maintain a flame at the burner is called:

• Flame rectification supervision device

• Solenoid valve

• Thermocouple

• Vitiation sensing device

SSOV stands for:

• Solenoid shut-off valve

• Safety shut-off valve

• Supervised shut-off valve

• Standard shut-off valve

What fault on a flame rectification supervision device might cause the burner to lock out?

• Short circuit

• Open circuit

• Ground fault

• All of the above

What device would an interrupter be incorporated into?

• Solenoid valve

• Thermocouple

• Flame rectification supervision device

• Vitiation sensing device

Draw a regulator