US 21900 & Trade Science

​Don't forget to use your study guide and web research in conjunction with this lesson. You need 80% or higher to sit your formative assessment

​Y

​Self Check # 1

​Please complete

Multiple Choice

What is the odorizing agent added to gas?

• Mercaptan

• Skunk juice

• Onion and garlic agent

• Phosphorus

Multiple Choice

What is the pressure in the transmission pipeline to the gate station?

• 2600 kpa

• 8600 kpa

• 7300 kpa

• 7 kpa

Multiple Select

What should you do in the event of a gas leak?

• Ventilate the area

• Isolate gas supply if possible

• Evacuate the area

• Turn on lights in the property to warn people of gas leak.

Multiple Choice

Is C3H8 heavier than air?

• Yes

• No

Multiple Choice

What is the gas measurement system also known by?

• GMS

• Newton meters

• MJ/HR

• Regulator

Multiple Choice

I am made up of C3H8 what am I?

• Natural gas

• LPG

• Carbon dioxide

• Helium

Multiple Choice

What pressure does the transmission line run at?

• 200 Kpa

• 1800 Kpa

• 7 Kpa

• 8600 Kpa

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​Self check #2

​Please complete

Multiple Choice

Name the pipe that conveys natural gas under streets.

• Distribution main

• Transmission lines

• Consumer pipework

• Yellow HDPE

Multiple Select

1. Name the 2 items from the outlet of which gasfitting work begins. Choose all that apply

• The primary meter outlet

• At the regulator outlet.

• From the meter inlet

• The valve outlet

Multiple Choice

If natural gas leaks, will it rise or fall?

• Rise

• Fall

• Stall

• Sink slowly

Multiple Choice

Where do you get this form from?

• ESS

• Myskills login

• Worksafe

• PGD Board website

Multiple Choice

Would an "unsafe condition" be classed as careless or incorrect testing of gas lines

• Yes

• No

• Maybe, depends if you are supervised

Multiple Select

Select the systems which are considered NOT proprietary

Multiple Choice

Carbon monoxide is a safe by product of using a gas appliance

• TRUE

• FALSE

Gas Laws

Temp. Vs. Pressure

Temp. Vs. Volume

​A classic example is a hot air balloon

Number of Molecules vs. Volume

​Check this out !!

​LPG properties

​Do some study guide research and check the atomic structure

​Check this out !!

​Self check # 3

​Please complete

Multiple Choice

If you increase the temperature of a balloon, what will happen to its volume?

• Increase

• Decrease

• Stay the Same

Multiple Choice

Inversely proportional means as one value increases the other............. 

• increases 

• decreases 

• stays the same 

  goes to zero

• goes to zero

Multiple Choice

When a basketball is left outside in the cold it goes flat because the volume of air inside the ball has been reduced. What  gas law does this represent?

• Charles's Law

• Boyle's Law

• Coles Law

• Guy Luusac Law

Multiple Choice

If you lower the pressure of a metal container, what will happen to its temperature?

• Increase

• Decrease

• Stay the Same

Multiple Choice

If you decrease the volume of a container, what will happen to it’s pressure?

• Increase

• Decrease

• Stay the Same

Multiple Choice

If you increase the amount of molecules in a container, what will happen to the volume?

• Increase

• Decrease

• Stay the Same

Multiple Choice

Boyle's Law shows the relationship between between which two factors of a gas?

• Volume and mass

• pressure and temperature 

• temperature and pressure 

• volume and pressure 

​Well Done !

​Thankyou for completing this lesson