Power Engineering 4th Class - A6
Questions With All Correct Verified
Solutions| 2026 Update
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 - Ans--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 - Ans--a
The electrical power necessary for arc welding may be supplied by:
a. Solar cells
b. Capacitors
c. Batteries
d. Transformers - Ans--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 - Ans--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
d. because it rapidly loses heat at elevated pressures - Ans--a
Copper alloys are _______ than pure copper:
a. Easier to machine
b. Weaker
c. Less resistant to corrosion
d. Harder to machine - Ans--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 - Ans--b
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 - Ans--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 - Ans--a
With regards to a form of NDE, a transducer is part of the equipment
required for a/an:
a. Radiographic test
b. Penetrant test
, c. Ultrasonic test
d. Eddy Current test - Ans--c
Submerged arc welding is a(an)_____ welding process.
a. Oxy-acetylene
b. AC electric
c. AC or DC electric
d. DC - Ans--c
Electric arc temperatures may be as high as:
a. 4250°C
b. 5325°C
c. 7450°C
d. 8300°C - Ans--d
As compared to Penetrant Testing, Radiographic testing:
a. is reliable.
b. requires highly trained operators.
c. can be carried out more quickly.
d. is not as sensitive. - Ans--b
Aluminum alloys are used in the construction of:
a. Anti-friction bearings
b. Internal combustion engine parts
c. Electric motor field poles
d. Condenser tubes - Ans--b
For the determination of what mechanical property is a Brinnell test
conducted?
a. strength
b. hardness
c. toughness
d. ductility - Ans--b
Questions With All Correct Verified
Solutions| 2026 Update
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 - Ans--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 - Ans--a
The electrical power necessary for arc welding may be supplied by:
a. Solar cells
b. Capacitors
c. Batteries
d. Transformers - Ans--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 - Ans--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
d. because it rapidly loses heat at elevated pressures - Ans--a
Copper alloys are _______ than pure copper:
a. Easier to machine
b. Weaker
c. Less resistant to corrosion
d. Harder to machine - Ans--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 - Ans--b
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 - Ans--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 - Ans--a
With regards to a form of NDE, a transducer is part of the equipment
required for a/an:
a. Radiographic test
b. Penetrant test
, c. Ultrasonic test
d. Eddy Current test - Ans--c
Submerged arc welding is a(an)_____ welding process.
a. Oxy-acetylene
b. AC electric
c. AC or DC electric
d. DC - Ans--c
Electric arc temperatures may be as high as:
a. 4250°C
b. 5325°C
c. 7450°C
d. 8300°C - Ans--d
As compared to Penetrant Testing, Radiographic testing:
a. is reliable.
b. requires highly trained operators.
c. can be carried out more quickly.
d. is not as sensitive. - Ans--b
Aluminum alloys are used in the construction of:
a. Anti-friction bearings
b. Internal combustion engine parts
c. Electric motor field poles
d. Condenser tubes - Ans--b
For the determination of what mechanical property is a Brinnell test
conducted?
a. strength
b. hardness
c. toughness
d. ductility - Ans--b
