101

Question 1

What is plasma?

Answer 1

Super heated gas which causes the gas to ionize, this is considered a 4th state of matter

Question 2

What polarity does PAC use?

Answer 2

Straight polarity(DCEN)

Question 3

When talking about PAC, what is dross?

Answer 3

Re-solidified oxidized molten metal

Question 4

Which type of CAC-A is the most economical electrode? Why?

Answer 4

Large diameter DC copper coated electrode because you can have continuous operation without stub loss

Question 5

What PSI do you run compressed air when using CAC-A

Answer 5

80PSI- 100PSI (550KpA- 700KpA)

Question 6

What is the maximum stickout with CAC-A?

Answer 6

7” maximum

Question 7

What is the problem if the main hoist line hangs off centre to the raised boom?

Answer 7

The crane is not Level

Question 8

If a signalman has one thumb up and is bringing his fingers in and out what does this signal mean?

Answer 8

Boom up load down

Question 9

Why are synthetic ropes stronger than natural fibres?

Answer 9

Because they have no breaks in threads and strands

Question 10

What is WLL (working load limit)?

Answer 10

The weight that can be safely lifted by a wire rope

Question 11

What safety factor must be used when lifting people?

Answer 11

10:1

Question 12

What does ANSI mean?

Answer 12

American national standards institute

Question 13

What hold acetylene in solution?

Answer 13

Acetone

Question 14

How do you know the contents of a air bottle?

Answer 14

By reading the label (not the colour of the bottle)

Question 15

What is not considered a part of the regulator?

Answer 15

The dials

Question 16

Where are flashback arresters placed?

Answer 16

At the regulators

Question 17

What is the average pressure limits on hose lines?

Answer 17

400 PSI

Question 18

When using a oxy-fuel heating torch what is the difference in flame from a cutting flame?

Answer 18

When setting the acetylene you must be out of the smoke range

Question 19

While cutting with an oxy-fuel torch if the top edge of the metal is gone behind the cut what is the likely cause?

Answer 19

Either the pre-heat flames are too long or to close to the plate, or it is set to an oxidizing flame

Question 20

What ferrous metals can not be satisfactorily cut with an oxy-fuel torch?

Answer 20

Cast iron, and stainless steel

Question 21

If there are three tubes running to the tip of a cutting torch what kind of torch is it?

Answer 21

A tip mixing torch

Question 22

what is a benefit of machine oxy-fuel cutting?

Answer 22

High degree of accuracy and repeatability

Question 23

What is a scarfing tip used for?

Answer 23

Removes minor imperfections during foundry and casting work

Question 24

When cutting thin material what must you change during cutting?

Answer 24

Inclination

Question 25

What are the three key elements of WHMIS?

Answer 25

Worker education, product labelling, and MSDS

Question 26

What classification and classes does WHMIS cover?

Answer 26

``` Compressed gases (Class A), flammable materials (Class B), oxidizing materials (Class C), poisonous and hazardous materials (Class D), Corrosive materials (Class E), dangerously reactive materials (Class F) ```

Question 27

Who supply's the MSDS?

Answer 27

The supplier, anytime a hazardous material is shipped it must be accompanied by a MSDS

Question 28

How must gas cylinders be transported?

Answer 28

Tightly and properly secured in an upright position

Question 29

What must be done before entire a confined space?

Answer 29

Make note of egress locations and check oxygen and hazardous gas levels with a gas detector (sniffer)

Question 30

What is the minimum number times air must be changed in an hour?

Answer 30

4 times an hour

Question 31

What is the lower explosive limit?

Answer 31

The minimum concentration of a flammable gas required for a flas or explosion with an ignition source

Question 32

What are the components of the fire triangle?

Answer 32

Fuel, air(oxygen), ignition source(heat)

Question 33

What is a class d fire?

Answer 33

Combustible metals

Question 34

What is the supplier label attached to?

Answer 34

The container that a hazardous material is shipped in

Question 35

What causes arc eye?

Answer 35

Ultra-violet light

Question 36

When working in a public environment who's responsibility is it to protect the public from adverse effects of welding?

Answer 36

The welder, use screens and warning signs

Question 37

How do you treat hypothermia?

Answer 37

Raise body temperature, using warm decaffeinated drinks, and warm clothing

Question 38

What is the maximum decibel level that you can work for eight hours without hearing protection?

Answer 38

85 decibels

Question 39

When cutting with oxy-fuel what shade range do you use?

Answer 39

Shade #4-#6

Question 40

If after welding you see little light spots what is the likely cause?

Answer 40

Using a shade level too low for the process you're using

Question 41

What does PASS stand for?

Answer 41

Pull the pin Aim the nozzle Squeeze the trigger Sweep