Jays Tq Sheet/ Welding Objectives

Question 1

Included angle for a turning vane?

Answer 1

90 degrees

Question 2

What angle is the vane rail installed on a 90° elbow?

Answer 2

45 degrees

Question 3

What is the maximum spacing for screws on a turning vane assembly?

Answer 3

12”

Question 4

What transverse joint is mostly used for round pipe?

Answer 4

Slip joint

Question 5

How is the speed of the cutting head measured on a plasma table

Answer 5

Inches per minute (IPM)

Question 6

When plasma cutting HVAC parts what is the advantage of nesting?

Answer 6

Optimizing material usage

Question 7

What are the 2 consumables called on the plasma cutting machine?

Answer 7

Nozzle and electrode

Question 8

When assembling a transitional change 90 (F.O.T.) what should be assembled first

Answer 8

Sloped cheek to the throat then the heel

Question 9

What is the minimum hanger spacing for commercial duct ?

Answer 9

Refer to SMACNA

Question 10

What should you consider when ordering acoustically lined duct

Answer 10

Free internal area as per drawing

Question 11

How is SMACNA duct pressure classifications measured

Answer 11

“ water column and pascals

Question 12

What pressure classes are considered medium pressure

Answer 12

3” wc (750pa) 4” wc (1000pa) 6” wc (1500pa)

Question 13

What is measured after performing a duct leakage test

Answer 13

CFM

Question 14

When using a manometer on a duct leakage test what is being measured

Answer 14

Static pressure

Question 15

When using a manometer on a duct leakage test what is it connected too

Answer 15

The duct system

Question 16

When GTAW welding light gauge sheet metal what would be the easiest transverse joint to connect to rectangular duct

Answer 16

Standing seam/ flanged joint

Question 17

When reffering to transverse joints what seam provides strength and ease of welding

Answer 17

Standing seam/ flanged joint

Question 18

When using GTAW on aluminum where is the filler rod melted

Answer 18

Weld puddle

Question 19

List three ways to eliminate warping when using GTAW on stainless steel

Answer 19

Copper chill/ aluminum plates

Skip/ step back welding

Tacking frequently

Question 20

What oxide forms on stainless steel

Answer 20

Chromium oxide

Question 21

How many BTUH are in a kilowatt

Answer 21

3412

Question 22

What does DCSP stand for

Answer 22

Direct current straight polarity

Question 23

What is the main advantage of air bending on a press brake

Answer 23

less tonnage required

Question 24

What 2 adjustments need to be done to a spot welder prior to spot welding stainless steel

Answer 24

Increase electrode pressure, decrease current settings

Question 25

What shielding gas is commonly used for stainless steel GTAW

Answer 25

Argon

Question 26

What is the percentage of the argon/ helium mixture used for GTAW

Answer 26

80% Argon 20% helium

Question 27

What grit of abrasives are used to create a #4 finish on stainless steels

Answer 27

150-180

Question 28

What is the term used to describe the pressure drop created from coils, filters, grilles etc

Answer 28

External static pressures

Question 29

At what velocity are we required to add metal nosing to internally insulated ducts

Answer 29

4000 fpm

Question 30

What is the minimal amount of correction brakes normally done on a transitional y branch

Answer 30

4

Question 31

What is the recommended color of tungsten used to weld aluminum

Answer 31

Brown, Zirconium

Question 32

At what threshold do we consider a wall to be below grade

Answer 32

2 feet below grade

Question 33

What is the name given to the void left after plasma cutting

Answer 33

Kerf

Question 34

What does VAV stand for

Answer 34

Variable air volume

Question 35

Where is the greatest heat loss on a home in the heating season

Answer 35

Windows, doors

Question 36

What current is used to GTAW aluminum

Answer 36

AC

Question 37

What seam is the strongest on round pipe

Answer 37

Butt weld

Question 38

How much of the plan view is required to lay out an on centre square to round

Answer 38

1/4

Question 39

Where does the mixing happen in a multi zone unit

Answer 39

At the unit

Question 40

How do we compensate for vibration between a fan and ductwork

Answer 40

Flexible duct connector

Question 41

Which type of rectangular duct damper is used to control the volume of air

Answer 41

Opposed blade damper

Question 42

What is the function of turning vanes

Answer 42

To reduce turbulence

Question 43

What parts of turning vanes are pre fabricated and shop fabricated

Answer 43

Vanes- shop fab Rails- pre fab

Question 44

Other than the correct shaded lens and proper ppe what safety EQUIPTMENT is recommended to use when operating a plasma cutter

Answer 44

Long sleeves/ gloves

Question 45

What’s the minimum view required to lay out a square to round that’s eccentric both ways

Answer 45

Full plan view

Question 46

How many lines do you need to determine a true length in triangulation

Answer 46

2

Question 47

What type of fan is used for dust collection

Answer 47

Radial blade

Question 48

What views are needed to develop a pattern for a right angle boot

Answer 48

Elevation and plan view

Question 49

What kind of metal is used for a chute in a food processing plant

Answer 49

Stainless steel

Question 50

What type of inline fan is the most effecient

Answer 50

Vaneaxial

Question 51

What % of leakage is acceptable for a medium pressure duct system

Answer 51

5%

Question 52

What type of valve is used on a heat pump to reverse the flow of refrigerant

Answer 52

4 way reversing valve

Question 53

What type of valve is used on a heat pump to reverse the flow of refrigerant

Answer 53

4-way reversing valve

Question 54

Why do we overbend stainless steel in a handbrake

Answer 54

To compensate for spring back

Question 55

When fabricating an aluminum project what are three things done to ensure proper fit up

Answer 55

Tacking, clamping, fixturing

Question 56

How do we test a spot weld quality on stainless steel

Answer 56

Trial piece and 60-90 twist test

Question 57

What transverse joint is used for pipe over 60”

Answer 57

Flanged joint