exam 1

Question 1

How would you check for leaks on oxy fuel equiptment

1. increasing the pressure to hear it
2. with leak detection fluid
3. using anti leak solution
4. with a flame from a lighter

Answer 1

2. with leak detection fluid

Question 2

How do you measure the size of a fillet weld
1. length of the shortest leg
2. lenght of the effective throat
3. length of the longest leg
4. length of the shoirtest leg plus penetration

Answer 2

1. length of the shortest leg

Question 3

what is the main reason for using pre heat on heavy sections prior to welding

1. reduce the quenching effect and remove hydrogen
2. aid in the formation of the weld bead
3. reduce the current setting
4. eliminate the need for cleaning

Answer 3

1. reduce the quenching effect and remove hydrogen

Question 4

why should oxy acetylene welding or cutting never be done with the acetylene cylinder lying down
1. acetylene will be trapped in the regulator
2. acetone will flow from the acetylene cylinder
3. acetylene will not flow through freely
4. oxygen and acetylene will not mix evenly

Answer 4

2. acetone will flow from the acetylene cylinder

Question 5

Due to weld joint shrinkage, which metal is more likely to crack?
1. Cast iron
2. Stainless Steel
3. Carbon Steel
4. Aluminum

Answer 5

1. Cast iron

Question 6

Which disk would be selected when using a 5” grinder that has a 10,000 r.p.m rating and grinding on the flat side of the blade?
1. disk thickness 1/16”, rated at 10,000 rpm
2. disk thickness 1/4” rated at 12,200 rpm
3. disk thickness 1/4 rated at 8600 rpm
4. disk thickness 3/32” rated at 12,200

Answer 6

2. disk thickness 1/4” rated at 12,200 rpm

Question 7

what do you do when welding where the general public will be exposed to the rays of the arc
1. rope off the area
2. proper screens and warning signs
3. give a verbal warning before starting to weld
4. inform the saftey coordinator

Answer 7

2. proper screens and warning signs

Question 8

what would be the apporximate temperture range of a rod oven for proper storage of low hydrogen electrodes
1. 260ºC - 427ºC (500-800ºF) for one to two hours
2. 260ºC - 427ºC (500-800ºF) above the ambient temperature
3. 30ºC - 140ºC (85 - 250 ºF) below the ambient temperature
4. 30ºC - 140ºC (85 - 250 ºF) above the ambient temperature

Answer 8

4. 30ºC - 140ºC (85 - 250 ºF) above the ambient temperature

Question 9

what is the most common ration of soluble oil to water used for coolant / lubricant on a horizontal band saw
1. 10 to 1
2. 25 to 1
3. 1 to 25
4. 1 to 10

Answer 9

3. 1 to 25

Question 10

When using PAC equipment, what dictates travel speed?
1. type and thickness of material
2. skill of the operator
3. condition of the constricting nozzle
4. condition of the electrode

Answer 10

1. type and thickness of material

Question 11

The main purpose of the copper coating found on CAC-A electrodes is to?
1. reduce the vaporization rate of the electrode
2. improve arc stability through a wider range of amperage settings
3. add extra force and penetration characteristics to the electrode
4. add to the the resistance of the electrode

Answer 11

1. reduce the vaporization rate of the electrode

Question 12

How much open circuit voltage is present for use with the PAC gouging process?
1. 35-120 volts
2. 15-35 volts
3. 400-500 volts
4. 120-400 volts

Answer 12

4. 120-400 volts

Question 13

Which type of welding machine will have a significant energy savings?
1. ac generator
2. ac transformer
3. inverter
4. transformer rectifier

Answer 13

3. inverter