wayground logo

Free Printable Worksheets

NEW

Font size

S
M
L
XL
Worksheets

CSWIP 3.1 - Heat Input

Total questions: 40

Worksheet time: 40mins

Name
Class
Date
1.

Question 1.

Which of the following is the correct arc energy minimum and maximum, if the amps are (250-300), volts (25-28) and travel speed (250-300) mm/minute by MMA welding?

a)

1,0 - 1,5 (kJ/mm)

b)

1,0 - 1,6kJ/mm)

c)

1,25 - 2,0 (kJ/mm)

d)

1,5 - 2,0 (kJ/mm)

2.

Question 1a.

With reference to the previous question and the correct answer, what the minimum

and maximum heat input?

a)

1,0 - 1,5 (kJ/mm)

b)

1,0 - 1,6 (kJ/mm)

c)

1,25 - 2,0 (kJ/mm)

d)

1,5 - 2,0 (kJ/mm)

3.

Question 2

During the MAG welding of a test piece for the purpose of approving a WPS the following parameters have been recorded: Amps 300, Volts 30, ROL 250mm, time 1 minute.

What is the heat input value?

a)

1.808 KJ/mm.

b)

2.055 KJ/mm.

c)

1.728 KJ/mm.

d)

2.16 KJ/mm.

4.

Question 3.

The specimen for hardness test shall be taken from which of position when doing the welding HL045?

a)

PB

b)

PA

c)

PE

d)

PC

5.

Question 3a.

With reference to the above question and the correct answer, what is the reason?

a)

Highest heat input

b)

Lowest heat input

c)

K=1

d)

K=0.8

6.

Question 4

What is the thermal efficiency factor of SAW?

a)

k=1,0 (AE= HI)

b)

k=0.8

c)

k=0,5

d)

k=0,6

7.

Question 4a.

With reference to the above question and the correct answer, what is the definition of thermal efficiency factor:

a)

Efficiency factor is Arc energy x 100% / Heat input

b)

Efficiency factor is Heat input x 100% / Arc energy

c)

Efficiency factor is Heat input / Arc energy

d)

Efficiency factor is arc energy / heat input

8.

Question 5.

Heat Affected Zone (HAZ)

a)

Higher strength

b)

Higher hardness

c)

Lower toughness

d)

Lost of corrosion resistance

e)

All of the above

9.

Question 5a.

With reference to the above question and the correct answer, what is the

meaning of HAZ?

a)

The Hardest region

b)

The area who receives heat on the fist time and faster cooling rate

c)

The one where the heat concentrated

d)

a and b correct

10.

Question 6.

Arc Strike?

a)

Arc Strike are the local damages to the surface of parent metals adjacent to

weld.

b)

High hardness

c)

Potentially crack

d)

Brittle

e)

All of the above are correct

11.

Question 6a.

With reference to the above question and the correct answer, how to remove arc strike?

a)

By grinding only

b)

By grinding and MT

c)

By grinding and PT

d)

MT and PT

12.

Question 7.

Hardness sample test from JL045 fixed pipe down hill welding is taken from following position?.

a)

PE

b)

PG

c)

PD

d)

PF

13.

Question 7a.

With reference to the previous question and the correct answer, what is not the reason for hardness?

a)

Slow cooling rate

b)

Fast travel speed.

c)

Lower heat input.

d)

Fast cooling rate

14.

Question 8

Sample for Charpy V-Notch test is taken from which position?

a)

PE

b)

PC

c)

PA

d)

PF

15.

Question 8a

With reference to the previous question and the correct answer, why is your reason?

a)

Weaving bead

b)

Fast travel speed

c)

Too short run out length

d)

High productivity

16.

Question 9

Hardness of weld zone not increased by:

a)

Low heat input

b)

Lack of preheat

c)

Travel speed too fast

d)

Travel speed too low

e)

Low amperage

17.

Question 9a.

With reference to the previous question, what is the effect of hardness

increase?

a)

Lack of fusion

b)

Entrap H2

c)

WFS too low

d)

WFS too high

18.

Question 10.

Weaving bead

a)

High heat input

b)

Lower travel speed

c)

Lower toughness

d)

Lower hardness

e)

All of the above correct

19.

Question 10a.

With reference to the previous question and the correct answer, what is the meaning of weaving bead not correct?

a)

Slower travel speed

b)

Short run out length

c)

Wide bead

d)

Narrow bead

20.

Q-11.

A WPS may specify a maximum width for individual weld beads (weave width) when welding C-Mn steels. If the width is exceeded it may cause:

a)

Lack of inter-run fusion.

b)

A reduction in HAZ toughness.

c)

Lack of sidewall fusion.

d)

Too low a deposition rate.

21.

Q-12.

What are the possible effects of having the heat input too low during welding?

a)

Low toughness, entrapped hydrogen and low hardness

b)

high hardness, lack of fusion and entrapped hydrogen

c)

Entrapped hydrogen, low toughness and high ductility.

d)

Lack of fusion, low toughness and a reduction in ductility

22.

Q-13.

Which of the following mechanical properties of a weld made on C-Mn steel is most affected if the heat input per unit length is excessively high?

a)

Tensile strength.

b)

Ductility

c)

Toughness.

d)

Elongation.

23.

Q-14.

A fast cooling rate could cause the following on medium carbon steels?

a)

Solidification cracking

b)

Hydrogen cracking

c)

Lamellar tearing

d)

Corrosion cracking

24.

Q-15.

Welds made with high heat inputs on C/Mn steels, show a reduction in one of the

following properties?

a)

Ductility

b)

Toughness

c)

Elongation

d)

Penetration

25.

Q-16.

AC-Mn steel is being welded by MMA and the electrode run-out lengths that have been used are much shorter than specified by the WPS. This deviation may give:

a)

Increased risk of hydrogen cracking.

b)

Increased risk of solidification cracking

c)

Lower values of HAZ toughness

d)

Higher values of HAZ hardness

26.

Q17.

If welding travel speed is doubled but the current and voltage remain the same the heat input will be:

a)

Reduced by 50%

b)

Increased by a factor of two.

c)

Reduced by approximately 25%.

d)

About the same.

27.

Q-18. A large grain size in the HAZ of a C-Mn steel weld joint may have:

a)

Low ductility.

b)

Low toughness.

c)

High toughness.

d)

High tensile strength.

28.

Q-19.

The toughness and yield strength of steel is reduced by:

a)

Reducing the grain size.

b)

Increasing the heat input

c)

Reducing the heat input

d)

Both a and b.

29.

Q-20. Travel speed

a)

If too fast may cause low toughness, slag inclusions and cap undercut

b)

If too fast may cause high-hardness, slag inclusions and a narrow thin weld bead

c)

If too slow may cause high hardness, excessive deposition and cold laps

d)

None of the above

30.

Q-21.

Which of the following is true?

a)

If run out length reduce heat input decreases

b)

If run out length increases heat input increases

c)

If weaving is reduced heat input increases

d)

None of the above

31.

Q-22.

Weldment in carbon manganese steel made using a higher than specified heat input may show ?

a)

Higher integrity

b)

Lower Distortion

c)

Lower toughness.

d)

Higher hardness,

32.

Q-23.

Weldment in C Mn steels, made by low heat input welding may show :

a)

Greater Ductility

b)

High Distortion

c)

High dilution

d)

High hardness.

33.

Q-24.

Arc strike are often problem on fabrication because of they can

a)

Increase toughness.

b)

Form hard spots

c)

Cause problems with coating.

d)

Lower hardness.

34.

Q-25.

During welding, your observe that the welder is weaving excessively what mechanical properties most likely to deteriorate because of this ?

a)

Percentage elongation

b)

Impact properties

c)

Chemical composition

d)

All of the above are correct

35.

Q-26.

In which position would weaving most likely to be done?

a)

PB

b)

PC

c)

PD

d)

PF

36.

Q-27.

When welding vertically up with the MMA process weaving is sometimes restricted to 2.5x electrode diameter, this restriction is mainly applied to-

a)

Reduce the overall width of the weld.

b)

Limit the heat input into the joint.

c)

Reduce the number of electrodes used in the joint.

d)

Reduced the time required to finish the weld.

37.

Q-28.

Which of the following welding position would normally give highest heat input?

a)

PA

b)

PC

c)

All position would be the same

d)

PF

38.

Q-29. The possible effects of having a travel speed too fast:-

a)

Low toughness, slag inclusions and cap undercut.

b)

High hardness, slag inclusions and narrow thin weld bead

c)

High hardness, excessive deposition rate and cold laps

d)

Low toughness, poor fusion and slag inclusions.

39.

Q-30.

Which of the following are correct?

a)

Both HI & AE are generally same value.

b)

Both HI & AE are generally different unit.

c)

HI generally higher than AE

d)

AE generally higher than HI

40.

Q-31.

To calculate the Arc Energy, what welding parameters is required?.

a)

Voltage and run out length

b)

Voltage and Current

c)

Current and travel speed

d)

Voltage, current and travel speed