Power Engineering - 4A6, 4A12, 3A1 Chapters 12-14
Practice Questions With Complete Solutions
_____ does not contain any neutrons in its nucleus.
A. Helium
B. Carbon
C. Oxygen
D. Hydrogen
E. Nitrogen Correct Answers D. Hydrogen
_____ increases the toughness and ductility of steel when added
to it.
A. Chromium
B. Vanadium
C. Manganese
D. Nickel
E. Molybdenum Correct Answers B. Vanadium
_____ is a material's ability to be greatly lengthened and
reduced in cross-sectional area without breaking.
A. Elasticity
B. Stiffness
C. Plasticity
D. Ductility
E. Toughness Correct Answers D. Ductility
(4-046-1.1) Materials that break rather than bend when
subjected to an applied external force are said to be:
,a. Tough
b. Malleable
c. Hard
d. Brittle Correct Answers d. Brittle
(4-046-1.2) A material that can be drawn out or extended in
length without breakage is:
a. Hard
b. Brittle
c. Ductile
d. Malleable Correct Answers c. Ductile
(4-046-1.3) The malleability of a metal:
a. Will usually decrease as the temperature rises
b. Is checked using the Charpy tester
c. Causes it to crack when struck with a hammer
d. Usually increases with the addition of heat Correct Answers
d. Usually increases with the addition of heat
(4-046-2.10) Wrought iron:
a. Is stronger than steel
b. Is corrosion resistant
c. Is a non-ferrous metal
d. Contains a high percentage of carbon Correct Answers b. Is
corrosion resistant
(4-046-2.11) Pig iron:
,a. Is the raw material from which brass is made
b. Contains at least 2% carbon
c. Has most of its carbon in a combined state
d. Is the raw material from which cast iron is made Correct
Answers d. Is the raw material from which cast iron is made
(4-046-2.12) An element that increases creep strength in metal
is:
a. Nickel
b. Vanadium
c. Molybdenum
d. Manganese Correct Answers c. Molybdenum
(4-046-2.13) In order to avoid residual stresses after welding,
alloy steels:
a. Cannot contain any copper
b. Must contain copper
c. Should be heated before, during and after welding
d. Must be heated after welding Correct Answers c. Should be
heated before, during and after welding
(4-046-2.3) Medium carbon steel becomes difficult to weld
when its carbon content exceeds:
a. 10%
b. 3.5%
c. 0.35%
d. 0.25% Correct Answers c. 0.35%
, (4-046-2.5) When chromium is added to alloy steel, it:
a. Increases toughness
b. Increases ductility
c. Increases hardness
d. Improves machinability Correct Answers c. Increases
hardness
(4-046-2.6) In the process of making iron, limestone is added to:
a. Pig iron moulds
b. The iron ore in the moulds
c. The blast furnace in order to form slag
d. Make the pig iron more malleable Correct Answers c. The
blast furnace in order to form slag
(4-046-2.8) Pig iron is:
a. Made from cast iron
b. Low in carbon content
c. Made from iron ore
d. The same as white cast iron Correct Answers c. Made from
iron ore
(4-046-2.9) Stainless steel:
a. Is corrosion resistant
b. Has a high carbon content
c. Is not an alloy steel
d. Is magnetic Correct Answers a. Is corrosion resistant
Practice Questions With Complete Solutions
_____ does not contain any neutrons in its nucleus.
A. Helium
B. Carbon
C. Oxygen
D. Hydrogen
E. Nitrogen Correct Answers D. Hydrogen
_____ increases the toughness and ductility of steel when added
to it.
A. Chromium
B. Vanadium
C. Manganese
D. Nickel
E. Molybdenum Correct Answers B. Vanadium
_____ is a material's ability to be greatly lengthened and
reduced in cross-sectional area without breaking.
A. Elasticity
B. Stiffness
C. Plasticity
D. Ductility
E. Toughness Correct Answers D. Ductility
(4-046-1.1) Materials that break rather than bend when
subjected to an applied external force are said to be:
,a. Tough
b. Malleable
c. Hard
d. Brittle Correct Answers d. Brittle
(4-046-1.2) A material that can be drawn out or extended in
length without breakage is:
a. Hard
b. Brittle
c. Ductile
d. Malleable Correct Answers c. Ductile
(4-046-1.3) The malleability of a metal:
a. Will usually decrease as the temperature rises
b. Is checked using the Charpy tester
c. Causes it to crack when struck with a hammer
d. Usually increases with the addition of heat Correct Answers
d. Usually increases with the addition of heat
(4-046-2.10) Wrought iron:
a. Is stronger than steel
b. Is corrosion resistant
c. Is a non-ferrous metal
d. Contains a high percentage of carbon Correct Answers b. Is
corrosion resistant
(4-046-2.11) Pig iron:
,a. Is the raw material from which brass is made
b. Contains at least 2% carbon
c. Has most of its carbon in a combined state
d. Is the raw material from which cast iron is made Correct
Answers d. Is the raw material from which cast iron is made
(4-046-2.12) An element that increases creep strength in metal
is:
a. Nickel
b. Vanadium
c. Molybdenum
d. Manganese Correct Answers c. Molybdenum
(4-046-2.13) In order to avoid residual stresses after welding,
alloy steels:
a. Cannot contain any copper
b. Must contain copper
c. Should be heated before, during and after welding
d. Must be heated after welding Correct Answers c. Should be
heated before, during and after welding
(4-046-2.3) Medium carbon steel becomes difficult to weld
when its carbon content exceeds:
a. 10%
b. 3.5%
c. 0.35%
d. 0.25% Correct Answers c. 0.35%
, (4-046-2.5) When chromium is added to alloy steel, it:
a. Increases toughness
b. Increases ductility
c. Increases hardness
d. Improves machinability Correct Answers c. Increases
hardness
(4-046-2.6) In the process of making iron, limestone is added to:
a. Pig iron moulds
b. The iron ore in the moulds
c. The blast furnace in order to form slag
d. Make the pig iron more malleable Correct Answers c. The
blast furnace in order to form slag
(4-046-2.8) Pig iron is:
a. Made from cast iron
b. Low in carbon content
c. Made from iron ore
d. The same as white cast iron Correct Answers c. Made from
iron ore
(4-046-2.9) Stainless steel:
a. Is corrosion resistant
b. Has a high carbon content
c. Is not an alloy steel
d. Is magnetic Correct Answers a. Is corrosion resistant
