ENGM 445 2026 Exam Questions
with 100% Correct Answers |
Latest Update
When casting low carbon steel under certain mold conditions, the mold
constant in Chvorinov's rule = 4.0 min/cm^2. Determine how long
solidification will take for a rectangular casting whose length = 30 cm, width
= 15 cm, and thickness = 20 mm. - 🧠 ANSWER ✔✔2.78 min
Why must the cross-sectional area at the bottom of the sprue be less than
the cross-sectional area at the top of the sprue during pouring? - 🧠
ANSWER ✔✔In order to ensure that the volume flow rate of the flowing
,metal is the same at the top and bottom of the sprue and hence prevent air
from being aspirated into the liquid and conducted into the mold cavity.
Which of the following are some of the factors that affect the fluidity of a
molten metal during pouring into a mold cavity?
a) pouring temperature above the melting point
b) metal alloy composition
c) viscosity of the liquid metal
d) heat transfer to the surroundings
e) a, c, and d
f) all of the above - 🧠 ANSWER ✔✔f) all of the above
What is the limitation of permanent mold casting processes that does not
apply to expendable mold casting processes?
a) There is no limitation
b) the need to open the mold to retrieve the part
c) the need to reuse the mold for other similar part
d) b and c - 🧠 ANSWER ✔✔b) the need to open the mold to retrieve the
part
,The amount by which the mold must be made larger relative to the final
casting size is called the pattern shrinkage allowance. Using Table 10.1,
determine the shrinkage allowance to be used by pattern makers for yellow
brass. Express your answer in terms of decimal fraction inches of
elongation per food of length compared to a standard one-foot scale (OR
what shrinkage allowance should be used for a 12 in long yellow brass)? -
🧠 ANSWER ✔✔0.183 in
A riser in the shape of a sphere is to be designed for a sand casting mold.
The casting is a rectangular plate, with length = 200 mm, width = 100 mm,
and thickness = 18 mm. If the total solidification time of the casting itself is
known to be 3.5 min, determine the diameter of the riser so that it will take
25% longer for the riser to solidify. - 🧠 ANSWER ✔✔47.5 mm
What is a chaplet? - 🧠 ANSWER ✔✔Chaplets are the supports that hold the
core in position within the mold cavity during pouring.
What properties determine the quality of a sand mold for sand casting?
a) strength
b) permeability
c) thermal stability
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2026. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
, d) collapsibility
e) reusability
f) all - 🧠 ANSWER ✔✔f) all
What is flash in die casting? - 🧠 ANSWER ✔✔Flash is the liquid metal that
squeezes into the small space between the die halves at the parting line or
into the clearances around the cores and ejector pins.
What are some of the general defects encountered in casting processes?
Name and briefly describe three. - 🧠 ANSWER ✔✔1. misruns: castings that
solidify before the mold cavity has been completely filled
2. cold shuts: when two portions of the metal flow together but do not fuse
together due to the premature freezing
3. cold shots: castings in which solid globules of metal have formed and
become entrapped in the casting because of splattering during pouring
Investment casting has which two of the following advantages compared to
most other casting processes:
a) close dimensional control
b) high production rates
with 100% Correct Answers |
Latest Update
When casting low carbon steel under certain mold conditions, the mold
constant in Chvorinov's rule = 4.0 min/cm^2. Determine how long
solidification will take for a rectangular casting whose length = 30 cm, width
= 15 cm, and thickness = 20 mm. - 🧠 ANSWER ✔✔2.78 min
Why must the cross-sectional area at the bottom of the sprue be less than
the cross-sectional area at the top of the sprue during pouring? - 🧠
ANSWER ✔✔In order to ensure that the volume flow rate of the flowing
,metal is the same at the top and bottom of the sprue and hence prevent air
from being aspirated into the liquid and conducted into the mold cavity.
Which of the following are some of the factors that affect the fluidity of a
molten metal during pouring into a mold cavity?
a) pouring temperature above the melting point
b) metal alloy composition
c) viscosity of the liquid metal
d) heat transfer to the surroundings
e) a, c, and d
f) all of the above - 🧠 ANSWER ✔✔f) all of the above
What is the limitation of permanent mold casting processes that does not
apply to expendable mold casting processes?
a) There is no limitation
b) the need to open the mold to retrieve the part
c) the need to reuse the mold for other similar part
d) b and c - 🧠 ANSWER ✔✔b) the need to open the mold to retrieve the
part
,The amount by which the mold must be made larger relative to the final
casting size is called the pattern shrinkage allowance. Using Table 10.1,
determine the shrinkage allowance to be used by pattern makers for yellow
brass. Express your answer in terms of decimal fraction inches of
elongation per food of length compared to a standard one-foot scale (OR
what shrinkage allowance should be used for a 12 in long yellow brass)? -
🧠 ANSWER ✔✔0.183 in
A riser in the shape of a sphere is to be designed for a sand casting mold.
The casting is a rectangular plate, with length = 200 mm, width = 100 mm,
and thickness = 18 mm. If the total solidification time of the casting itself is
known to be 3.5 min, determine the diameter of the riser so that it will take
25% longer for the riser to solidify. - 🧠 ANSWER ✔✔47.5 mm
What is a chaplet? - 🧠 ANSWER ✔✔Chaplets are the supports that hold the
core in position within the mold cavity during pouring.
What properties determine the quality of a sand mold for sand casting?
a) strength
b) permeability
c) thermal stability
COPYRIGHT©PROFFKERRYMARTIN 2025/2026. YEAR PUBLISHED 2026. COMPANY REGISTRATION NUMBER: 619652435. TERMS OF USE.
PRIVACY STATEMENT. ALL RIGHTS RESERVED
, d) collapsibility
e) reusability
f) all - 🧠 ANSWER ✔✔f) all
What is flash in die casting? - 🧠 ANSWER ✔✔Flash is the liquid metal that
squeezes into the small space between the die halves at the parting line or
into the clearances around the cores and ejector pins.
What are some of the general defects encountered in casting processes?
Name and briefly describe three. - 🧠 ANSWER ✔✔1. misruns: castings that
solidify before the mold cavity has been completely filled
2. cold shuts: when two portions of the metal flow together but do not fuse
together due to the premature freezing
3. cold shots: castings in which solid globules of metal have formed and
become entrapped in the casting because of splattering during pouring
Investment casting has which two of the following advantages compared to
most other casting processes:
a) close dimensional control
b) high production rates
