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CWI Prep Tests > MATH > Flashcards

MATH Flashcards

1
Q

1. What does“S. I. Units” mean?

  1. Standard International Units
  2. International System of Units
  3. International Socialized System of Units
  4. Institute of Systems International
A

1. What does “S. I. Units” mean?

b. International System of Units

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2
Q

2. What is the S. I. unit for impact energy in the electric arc?

  1. The Pascal = Pa
  2. The joule = J
  3. The watt = W
  4. The ampere = A
A

2. What is the S. I. unit for impact energy in the electric arc?

b. The joule = J

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3
Q

3. What is the S. I. unit used to measure power?

  1. The Pascal = Pa
  2. The joule = J
  3. The watt = W
  4. The ampere = A
A

3. What is the S. I. unit used to measure power?

c. The watt = W

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4
Q

4. What derived S. I. unit is used to measure tensile strength?

  1. The Pascal = Pa
  2. The joule = J
  3. The watt = W
  4. The ampere = A
A

4. What derived S. I. unit is used to measure tensile strength?

a. The Pascal = Pa

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5
Q

5. What is 100,000 psi tensile strength in S. I.?

  1. 690 Pa
  2. 690 kPa
  3. 690 MPa
  4. None of the above
A

5. What is 100,000 psi tensile strength in S. I.?

c. 690 MPa

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6
Q

6. An electrode box is marked 45 kg. What weight is this (approximately) in pounds?

  1. 9.9 lbs
  2. 90 lbs
  3. 95 lbs
  4. 991bs
A

6. An electrode box is marked 45 kg. What weight is this (approximately) in pounds?

d. 991bs

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7
Q

7. The notch impact strength of a certain weld must be measured at minus 51 °C. What temperature is this on our customary scale?

a. 123°F
b. -60°F
c. 91.8° F
d. 149.4 °F

A

7. The notch impact strength of a certain weld must be measured at minus 51 °C. What temperature is this on our customary scale?

b. -60°F

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8
Q

8. Using this formula, calculate the heat input in S. I. units for a weld made at 19 volts, 187 amperes, and 3.5 inches per minute.

a. 61 kJ/m
b. 2.4 MJ/m

c. 420 MJ/m
d. 239 kJ/m

A

8. Using this formula, calculate the heat input in S. I. units for a weld made at 19 volts, 187 amperes, and 3.5 inches per minute.

b. 2.4 MJ/m

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9
Q

9. The ultimate tensile strength (UTS) of a cylindrical tensile specimen is expressed as follows:

What is the UTS in S. I. units for a ½ inch diameter specimen which failed at an ultimate load of 15 kips?

a. 764 MPa
b. 76,400 kPa
c. 527 kPa
d. 527 MPa

A

9. The ultimate tensile strength (UTS) of a cylindrical tensile specimen is expressed as follows:

What is the UTS in S. I. units for a ½ inch diameter specimen which failed at an ultimate load of 15 kips?

d. 527 MPa

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10
Q

10. A tensile specimen having a cross-sectional area of 0.279 square inches fails at a load of 21,283 pounds. What is its yield strength?

VS= Yield Point/ Area

a. 59,379 P_si
b. 5937 psi
c. 76,283 psi
d. 76.283 psi
e. None of the above

A

10. A tensile specimen having a cross-sectional area of 0.279 square inches fails at a load of 21,283 pounds. What is its yield strength?

VS= Yield Point/ Area

e. None of the above

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11
Q

11. What is the percent elongation of a specimen whose original gage length was 2 inches and final gage length was 2.5 inches?

a. 20%
b. 25%

c. 40%

d. 50%
e. None of the above

A

11. What is the percent elongation of a specimen whose original gage length was 2 inches and final gage length was 2.5 inches?

b. 25%

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12
Q

12. A 50Ib. can of welding electrodes weighs approximately how many kg?

a. 227 kg
b. 2.3 kg
c. 23 kg
d. 23,000 kg
e. None of the above

A

12. A 50Ib. can of welding electrodes weighs approximately how many kg?

c. 23 kg

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13
Q

13. What is the wire feed speed in SI units which is measured to be 175 in/min.?

  1. 0.074 mis
  2. 74 mm/s
  3. 7.4 mm/s
  4. “a” and “b” above
  5. “b” and “c” above
A

13. What is the wire feed speed in SI units which is measured to be 175 in/min.?

d. “a” and “b” above
a. 0.074 mis
b. 74 mm/s

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14
Q

14. A weld joint is measured and found to be 345 mm long. How long is that joint, approximately, in terms of inches?

a. 136”
b. 13.6”
c. 8760”
d. 876”
e. None of the above

A

14. A weld joint is measured and found to be 345 mm long. How long is that joint, approximately, in terms of inches?

b. 13.6”

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15
Q

15. A steel plate has an area of 40 in 2• How many mm2 is the plate?

a. 25,808 mm 2
b. 2580.8 mm 2
c. 258.1 mm 2
d. 25.8 mm 2

A

15. A steel plate has an area of 40 in 2• How many mm2 is the plate?

a. 25,808 mm 2

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16
Q

16. With the SAW process, we achieve a deposition rate of 19.7 kg/h. How many LB/his this?

  1. 434 LB/h
  2. 43.4 LB/h
  3. 87.5 LB/h
  4. 8.9 LB/h
A

16. With the SAW process, we achieve a deposition rate of 19.7 kg/h. How many LB/his this?

b. 43.4 LB/h

17
Q

17. With the GMAW process, we use a wire feed speed of 170 mm/s. How many in/min. is this?

  1. 40.2 in/min
  2. 53.7 in/min
  3. 402 in/min
  4. 537 in/min
A

17. With the GMAW process, we use a wire feed speed of 170 mm/s. How many in/min. is this?

c. 402 in/min

18
Q

18. With the GTAW process, flow rates are measured at 22 L/min. Approximately how many ft3/hr is this?

a. 10.4 ft3/h
b. 1.39 ft3/h
c. 46.6 ft3/h
d. 83.2 ft3/h
e. None of the above

A

18. With the GTAW process, flow rates are measured at 22 L/min. Approximately how many ft3/hr is this?

c. 46.6 ft3/h

19
Q

19. A tensile is being performed. The specimen fails at a load of 72 kips. What is the tensile strength of this specimen?

a. 72,000 psi
b. 496 MPa
c. 496,000,000 Pa
d. All of the above
e. Not enough information provided

A

19. A tensile is being performed. The specimen fails at a load of 72 kips. What is the tensile strength of this specimen?

e. Not enough information provided

20
Q

20. A heat input of 1,500,000 J/in is how many Jim?

a. 591,000 Jim
b. 59 MJ/m
c. 5.9 J/m
d. None of the above

A

20. A heat input of 1,500,000 J/in is how many Jim?

b. 59 MJ/m

21
Q

21. The heat capacity of a furnace is listed as 120,000 Btu. What is that in terms of Joules?

a. 126,600 J
b. 126,600,000 J
c. 126.6 MJ
d. Both “b” and “c”
e. None of the above

A

21. The heat capacity of a furnace is listed as 120,000 Btu. What is that in terms of Joules?

d. Both “b” and “c”

22
Q

22. The force required to bend a steel bar is measured to be 890 N. That is how many lbf?

a. 200 lbf
b. 2000 lbf
c. 20 lbf
d. 550 lbf

A

22. The force required to bend a steel bar is measured to be 890 N. That is how many lbf?

a. 200 lbf

23
Q

23. A coating was removed from an SMAW electrode. After weighing, it was found to have a mass of 2.4 oz. That is how many grams?

  1. 68 g
  2. 6.8 g
  3. 0.008 g
  4. 0.8 g
A

23. A coating was removed from an SMAW electrode. After weighing, it was found to have a mass of 2.4 oz. That is how many grams?

a. 68 g

24
Q

ANSWER SHEET

CWI Prep Tests (32 decks)

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