TQ Questions

Question 1

What is the calorific value of butane

Answer 1

3200 btu

Question 2

What is the best tungsten alloy for tig welding aluminum

Answer 2

Zirconium

Question 3

What current frequency is best for aluminum

Answer 3

AC

Question 4

What current frequency is best for ferrous metals?

Answer 4

DC

Question 5

When referring to gas nozzle sizes what does the size number indicate? Eg. #10 would be how big?

Answer 5

Opening measured in 1/16 increments. #10 would be 10/16 or 5/8

Question 6

What colour code represents the alloy zirconium on a tungsten alloy electrode?

Answer 6

Brown

Question 7

What is the ratio of Argon Helium shielding gas?

Answer 7

80% Argon, 20% Helium

Question 8

How many tubes are required to be hooked up to a pitot tube to measure total pressure?

Answer 8

1 on the bottom

Question 9

1 Kilowatt is equal to how many BTUH

Answer 9

3412 BTUH

Question 10

Where do you experience the greatest heat loss?

Answer 10

Windows and doors

Question 11

Below grade walls are walls that are MORE than _____ below grade?

Answer 11

2’

Question 12

Define concentric reducer

Answer 12

On center

Question 13

Define eccentric reducer

Answer 13

Off centre

Question 14

Medium pressure duct system have what range of “wc?

Answer 14

3”wc
4”wc
6”wc

Question 15

What are the 7 different pressure classifications in “wc

Answer 15

1/2
1
2
3
4
6
10

Question 16

What is the transverse duct connection on rectangular duct in a residential application?

Answer 16

Slip and drive

Question 17

On round pipe the space between screws should not exceed what?

Answer 17

15”

Question 18

What seam is used for all pressure classes

Answer 18

Butt weld

Question 19

Flanged joint is used on round duct over what size?

Answer 19

60”

Question 20

How do you determine hanger spacing for ductwork?

Answer 20

SMACNA

Question 21

How many BTUH in a KW

Answer 21

3412

Question 22

How is the speed of the plasma table measured?

Answer 22

Inches per minute (IPM)

Question 23

What is the first thing you need to put into the program for the fitting you want to fabricate on the plasma table?

Answer 23

Dimensions

Question 24

After eye protection what is the item of safety required for use in the plasma table?

Answer 24

Long sleeves/gloves

Question 25

Before a plasma table starts what safety device must be in place

Answer 25

Safety nozzle sensor

Question 26

On a plasma torch head which parts are consumables?

Answer 26

Electrode and nozzle

Question 27

______ is the void left behind from the plasma cut

Answer 27

Kerf

Question 28

What is Dross?

Answer 28

On a plasma cut when molten metal from the cut that has re-solidified before it was ejected from the cut

Question 29

How many different triangulated lengths are required for an on center square to round?

Answer 29

3

Question 30

What are the 7 static pressure ratings? Name their pressure class and seal class as well

Answer 30

1/2” wc - low - seal class C 1” wc - low - seal class C 2” wc - low - seal class C 3” wc - medium - seal class B 4” wc - medium - seal class A 6” wc - medium - seal class A 10” wc - high - seal class A

Question 31

What needs to be done to the size of acoustically lined duct?

Answer 31

Upsized to accommodate insulation

Question 32

Does the orientation of a house (north to south vs south to north) affect the heat gain of the house?

Answer 32

Yes

Question 33

If the seams are on the corner of a square to round what kind of view is required?

Answer 33

Full plan view

Question 34

Where does the seam go on a sloped square to round when being used as a roof jack?

Answer 34

The dry side

Question 35

If an off center square to round has an opening of 400mmx 300mm what is the distance to the work line?

Answer 35

150mm (always half of the second dimension)

Question 36

What grit is used to create a #4 mill polish?

Answer 36

150 grit

Question 37

What method is used when laying out a collar?

Answer 37

Parallel line development

Question 38

What type of fan can handle moisture or dust? (Not to be confused with materials or debris)

Answer 38

Backward inclined blades

Question 39

What is the amount of chromium and nickel in 18/10 stainless steel?

Answer 39

18% chromium 10% Nickel. *Chromium is always the first number*

Question 40

How many working gauges do you go up to account for stainless steel steel from mild steel?

Answer 40

4 gauge numbers or 2 working gauges

Question 41

What must be done when resistance (spot) welding stainless steel?

Answer 41

Increase pressure, lower amperage and current flow times

Question 42

What angles should be achieved before a resistance welding breaks?

Answer 42

60-90 degrees

Question 43

What are methods of distortion control

Answer 43

Copper chill plates Aluminum plates Stitch or step back welding

Question 44

What is the best method of finishing stainless steel

Answer 44

Gspb Grind Sand Polish Buff

Question 45

What’s another name for a spiral connecting collar?

Answer 45

Beaded sleeve joint

Question 46

What grit is used to achieve and #4 finish?

Answer 46

150 grit

Question 47

Where do you add the fill rod when welding?

Answer 47

To the puddle

Question 48

How many true lengths are on a 3 way pipe branch

Answer 48

4 (seams)