Power Engineering 4th Class - A6
Exam Questions & Answers (Grade
A+)
The two types of Penetrant Testing (PT) are fluorescent testing and:
a. Developer testing
b. Colour Contrast testing
c. Infrared testing
d. Viscous Penetrant testing -
correct answer ✅b
The problem with using brittle metals is that:
a. they can break suddenly and without warning
b. they cannot withstand high temperatures
c. they cannot be sharpened
d. they are not very strong -
correct answer ✅a
The electrical power necessary for arc welding may be supplied by:
a. Solar cells
,Power Engineering 4th Class - A6
Exam Questions & Answers (Grade
A+)
b. Capacitors
c. Batteries
d. Transformers -
correct answer ✅d
Pig iron:
a. Is the raw material from which cast iron is made
b. Has most of its carbon in a combined state
c. Contains at least 2% carbon
d. Is the raw material from which brass is made -
correct answer ✅a
Why is the pressure that acetylene used at so important?
a. because it is unstable at pressures above 103 kPa
b. because at high pressures it separates into acetone and trilene
c. because at low pressures (below 100 kPa) it becomes fluid
,Power Engineering 4th Class - A6
Exam Questions & Answers (Grade
A+)
d. because it rapidly loses heat at elevated pressures -
correct answer ✅a
Copper alloys are _______ than pure copper:
a. Easier to machine
b. Weaker
c. Less resistant to corrosion
d. Harder to machine -
correct answer ✅a
Arc welding produces:
a. an adhesive reaction between the metals
b. a puddle of molten metal at the electrode tip
c. a weld which has inferior metal properties than the parent
metals
d. no splatter, and minimal ultraviolet energy -
correct answer ✅b
, Power Engineering 4th Class - A6
Exam Questions & Answers (Grade
A+)
This type of non-fusion welding is often used in the construction of
refrigeration systems.
a. silver brazing
b. soldering
c. brazing
d. soft brazing -
correct answer ✅a
When talking about welding, what is the "parent metal"?
a. the pieces of metal that are being welded together
b. it is the filler rod metal
c. it is the original batch of metal the welded pieces were made of
d. it is the weld itself -
correct answer ✅a
Exam Questions & Answers (Grade
A+)
The two types of Penetrant Testing (PT) are fluorescent testing and:
a. Developer testing
b. Colour Contrast testing
c. Infrared testing
d. Viscous Penetrant testing -
correct answer ✅b
The problem with using brittle metals is that:
a. they can break suddenly and without warning
b. they cannot withstand high temperatures
c. they cannot be sharpened
d. they are not very strong -
correct answer ✅a
The electrical power necessary for arc welding may be supplied by:
a. Solar cells
,Power Engineering 4th Class - A6
Exam Questions & Answers (Grade
A+)
b. Capacitors
c. Batteries
d. Transformers -
correct answer ✅d
Pig iron:
a. Is the raw material from which cast iron is made
b. Has most of its carbon in a combined state
c. Contains at least 2% carbon
d. Is the raw material from which brass is made -
correct answer ✅a
Why is the pressure that acetylene used at so important?
a. because it is unstable at pressures above 103 kPa
b. because at high pressures it separates into acetone and trilene
c. because at low pressures (below 100 kPa) it becomes fluid
,Power Engineering 4th Class - A6
Exam Questions & Answers (Grade
A+)
d. because it rapidly loses heat at elevated pressures -
correct answer ✅a
Copper alloys are _______ than pure copper:
a. Easier to machine
b. Weaker
c. Less resistant to corrosion
d. Harder to machine -
correct answer ✅a
Arc welding produces:
a. an adhesive reaction between the metals
b. a puddle of molten metal at the electrode tip
c. a weld which has inferior metal properties than the parent
metals
d. no splatter, and minimal ultraviolet energy -
correct answer ✅b
, Power Engineering 4th Class - A6
Exam Questions & Answers (Grade
A+)
This type of non-fusion welding is often used in the construction of
refrigeration systems.
a. silver brazing
b. soldering
c. brazing
d. soft brazing -
correct answer ✅a
When talking about welding, what is the "parent metal"?
a. the pieces of metal that are being welded together
b. it is the filler rod metal
c. it is the original batch of metal the welded pieces were made of
d. it is the weld itself -
correct answer ✅a
