Question 1

If an uncontrolled gas escape is encountered, the first thing to do is...

Accepted Answer

inform the gas supplier or transporter

Answer

leave the site and inform the occupier as soon as  
        possible

Answer

notify CORGI

Answer

apply the Gas Industry Unsafe Situations Procedure for At Risk installations

Question 2

Where should the procedure to be carried out in the event of a gas escape be found?

Accepted Answer

Affixed to the meter

Answer

Affixed to the service pipe riser

Answer

On or near to the appliance

Answer

Affixed to the emergency control

Question 3

The main constituents of complete combustion are...

Accepted Answer

water vapour and carbon dioxide

Answer

carbon monoxide and nitrogen

Answer

methane and water vapour

Answer

nitrogen and methane

Question 4

The main visual sign of incomplete combustion within an appliance is...

Accepted Answer

soot formation, changes in the flame picture or flame impingement

Answer

stable blue flames with well-defined inner and outer cones

Answer

limescale deposits on the heat exchanger

Answer

carbon dioxide pluming from the burner

Question 5

The reason for waiting one minute before timing the soundness test is to...

Accepted Answer

allow for temperature stabilisation

Answer

allow the regulator to settle

Answer

reduce the gas velocity

Answer

prevent the ingress of air

Question 6

Providing there is no smell of gas, on an existing installation with appliances connected, the allowable pressure drop with an E6 meter fitted is....

Accepted Answer

8mb

Answer

2mb

Answer

4mb

Answer

0mb

Question 7

On an existing installation with no appliances fitted, the allowable pressure drop is...

Accepted Answer

zero (no pressure drop allowed)

Answer

related to the total volume of the meter and pipework

Answer

calculated by adding the total volume of the meter, pipework and appliances

Answer

determined by the total volume of the meter

Question 8

The meter regulator must operate at what pressure?

Accepted Answer

21mbar (+ or – 2mbar)

Answer

19mbar (+ or – 2mbar)

Answer

18mbar (+ or – 2mbar)

Answer

20mbar (+ or – 2mbar)

Question 9

After satisfactory testing and purging, what must be checked?

Accepted Answer

Working pressure at meter

Answer

All doors and windows are open

Answer

Operation of CO detectors

Answer

Standing pressure at the meter

Question 10

If pipework passes through any wall or other solid structure it must...

Accepted Answer

take the shortest route and be sleeved

Answer

only be steel

Answer

pass through an existing air brick

Answer

only be the wrapped copper

Question 11

When breaking into a gas supply pipe or removing a meter, what must be fitted?

Accepted Answer

A temporary continuity bond

Answer

A supplementary bond

Answer

An RCB

Answer

A main equipotential bond

Question 12

The emergency control valve handle or lever, in addition to being securely attached and parallel to the pipe when open, must also...

Accepted Answer

turn the gas off when moved downwards

Answer

turn the gas off when moved upwards

Answer

be sealed against unauthorised use

Answer

turn the gas off when rotated two full turns anti-clockwise

Question 13

Adventitious ventilation is...

Accepted Answer

the allowance made for background air seeping into rooms

Answer

the amount of air required to burn one cubic foot of gas

Answer

provided to prevent the build up of radon gas

Answer

always sited adjacent to the appliance

Question 14

The ventilation required for an appliance must be provided through grilles/vents with...

Accepted Answer

openings of greater than 5mm and less than 10mm

Answer

a vent of at least 35cm²

Answer

holes of less than 5mm

Answer

both high and low level openings, 300mm apart

Question 15

The correct amount of ventilation direct from outside, required for an open flued appliance with a heat input of 27kW (net), situated in a room is...

Accepted Answer

100cm2

Answer

121.5cm2

Answer

135cm2

Answer

90cm2

Question 16

What must be done if an existing appliance, not conforming to current ventilation requirements, is encountered?

Accepted Answer

Apply the Gas Industry Unsafe Situations Procedure

Answer

Notify Gas Safe

Answer

Leave an internal door permanently open

Answer

Carry out a spillage test

Question 17

If three or more air vents are put in series from room to room, their free area must be increased by what amount per room?

Accepted Answer

50%

Answer

100%

Answer

25%

Answer

15%

Question 18

A domestic cooker installed in a room volume of 9m³ with a door opening direct to the outside requires which of the following?

Accepted Answer

50cm² and an openable or equivalent

Answer

b.	50cm²

Answer

An openable window or equivalent

Answer

No specific requirement

Question 19

When checking the regulator, at what rate would the cooker be operated?

Accepted Answer

Three burners full rate

Answer

Four burners full rate

Answer

One burner full rate

Answer

Two burners full rate

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