Welding, Cutting, Metallurgy And Machining

Question 1

The force to pierce a 1/2 inch hole in a 1/2 inch thick steel plate is what?

Answer 1

40000 lbs

Question 2

What is the 2 types of milling?

Answer 2

Conventional and non conventional (climb milling)

Question 3

What type of milling is used for non-ferrous milling?

Answer 3

Climb milling

Question 4

Find the tap diameter size of 7/8” UNC thread.

Answer 4

49/64”

Question 5

What type of rod is good for overhead welding?

Answer 5

6010

Question 6

What causes a hissing sound from a torch tip?

Answer 6

Too much oxygen pressure on a small tip

Question 7

When working on a lathe and performing a thread cutting operation a lead screw is used. The included angle of these threads are what?

Answer 7

29 °

Question 8

The visual difference between hot and cold rolled steel is what?

Answer 8

Hot rolled steel has scaly surface

Question 9

Determine the taper per foot of a 6” diameter shaft taper down to 3” diameter over an 8” span.

Answer 9

9”

Question 10

Basic procedure to be done prior to cast iron welding is what?

Answer 10

Preheat

Question 11

A right-angle triangle has a side of 32” and the other 14”. What is the length of the 3rd leg?

Answer 11

A(squared) + B(squared) = C (squared)

34.93 “

Question 12

What is the procedure to temper carbon steel?

Answer 12

Quench immediately

Question 13

What is the cutting speed of ft/min for 1/2” drill at 600 RPM?

Answer 13

75

Question 14

What force is required to pierce a 2” hole in a 1/8” plate?

Answer 14

20 ton

Question 15

What type of Weld inclusion cannot be seen with the naked eye?

Answer 15

Imbedded slag

Question 16

Using a 7018 rod what condition reduces hydrogen in the flux and creates porous welds?

Answer 16

Damp flux

Question 17

What material gives the longest spark in a spark test?

Answer 17

High carbon steel

Question 18

What valve should be open all the way before lighting a torch?

Answer 18

Oxygen valve on the tank

Question 19

When mig welding what prevents porosity?

Answer 19

Sufficient gas flow to cover the weld area

Question 20

A 6010 rod is good for what?

Answer 20

All positions

Question 21

What does an offset tail stock on a lathe create?

Answer 21

Tapered shaft

Question 22

What technique is used with 6018 rod in the vertical position?

Answer 22

Wide weave upwards

Question 23

What should you do after welding a patch on a tank?

Answer 23

Hydrostatic test the welds

Question 24

HI 👋

Answer 24

Good job! Keep it up.

Question 25

If a welder catches fire what type of fire extinguisher is used to put out the fire?

Answer 25

Class C

Question 26

A gusset has a side of 5” in another side of 5” what is the area in square inches of the gusset?

Answer 26

12.5 square inches

Question 27

What should you do before operating a welding machine?

Answer 27

Check all connections

Question 28

What is polarity?

Answer 28

Direction of current flow

Question 29

What does the 70 in a 7018 rod refer to?

Answer 29

Tensile strength in pounds

Question 30

What is the method of testing materials without breaking them?

Answer 30

Non destructive testing

Question 31

What would you put on a steel plate prior to scribing a line?

Answer 31

Layout dye

Question 32

A steel plate measuring 48” x 96” x 1/2 inches weighs roughly how much?

Answer 32

667 lbs

Question 33

Calculate the volume of a tank with inside dimensions of 32” x 45” x 21”

Answer 33

17.5 cubic ft (LXWXH)= TOTAL ÷ 1728

Question 34

What should you do after welding a pressure vessel?

Answer 34

Test all welds

Question 35

What is used for scribing a line on a plate?

Answer 35

Marking/layout dye

Question 36

How is a file cleaned?

Answer 36

File card

Question 37

A type of flame is used on a cutting torch?

Answer 37

Neutral

Question 38

What causes torch backfire?

Answer 38

Tip too close to the work piece