Gas Tradesman Exam Questions 1

Which of the following is the correct name for AS/NZS 3604:2011?

What TWO main elements occur in both natural gas and LPG

Gases are classified into families. What does it mean if two gases are in the same family?

The gases require similar Pressures to change state from gas into liquid

The vaporisation points of the gases are within 25oC of each other ensuring even dilution of molecules once in a gas state

The gases were seperated after being excrtacted from the same well source

There is the possibility to interchange between the gases without the need to change injecor size

There is not more than 1 kg/m3 difference in density between the gases

The thermocouple produces an electrical current. Which reading would you expect to read on a multi-meter then testing a thermocouple?

What can occur within an appliance that has an efficiency exceeding 85%?

Which statement best describes a thermistor?

A vapour, or liquid filled sensing vial

A bimetallic temperature operated switch

An electronically controlled capacitor

A temperature dependant resistor

A mercury temperature sensing bulb

Why are heating outlets from ducred warm air furnaces permitted to be installed in small bedrooms and bathrooms?

The ducting can be altered to restrict flow

Convection heating cannot distribute carbon dioxide

The combustion portion of the heater is room sealed

Adequate ventilation is provided by the return air grille

The air entering the room is filtered

What is the maximum permissible length of a restraint chain on an appliance that is designed to be slid out for servicing?

75% of the length of the hose assembly

80% of the length of the hose assembly

85% of the length of the hose assembly

90% of the length of the hose assembly

95% of the length of the hose assembly

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