ENGM 445 Midterm 1 Question and
answers correctly solved
Which two of the following casting processes are expendable mold
operations?
A. centrifugal casting
B. Die casting
C. investment casting
D. low pressure casting
E. sand Casting
F. Slush casting - correct answer C. investment casting
E. sand Casting
Which one of the following best describes a tolerance?
A. clearance between a shaft and a mating hole
B. measurement error
c. total permissible variation from a specified dimension
d. Variation in manufacturing - correct answer C - total permissible variation
from a specified dimension
When a tolerance is specified in both the positive and negative directions from
the nominal dimension, it is called
A. bidirectional tolerance
B. bifurcated tolerance
C. bilateral tolerance
D. limit tolerance
E. symmetrical tolerance - correct answer C - bilateral tolerance
,Accuracy is the degree to which the measured value agrees with the true
value of the quantity of interest.
T/F - correct answer True
A batch of components is returned to the manufacturer with the claim that all
parts are outside tolerance, even though their dimensions are closely
clustered. In-process, 100% inspection had been made with a pneumatic
gauge. Can the complaint be correct?
Y/N - correct answer Yes
A surface plate is typically made of which one of the following materials?
A. aluminum oxide
B. cast iron
C. granite
D. hard poloymers
E. Stainless steel - correct answer C - granite
Surface roughness is defined as the average of the vertical deviations from
the nominal surface over a specified length.
T/F - correct answer True
Roughness and waviness are both deviations from the nominal surface in
defining surface texture. Which one has the larger spacing between
deviations?
A. roughness
B. Waviness - correct answer B - waviness
, The surface finish of a part is specified as 1.6μm Ra maximum. A handheld
stylus-type instrument gives readings in μm RMS. Should the maximum
permissible limit be greater or smaller than 1.60 μm?
A. Greater
B. Lower - correct answer A. Greater
The flow curve describes the property of metals known as which one of the
following?
A. ductility
B. engineering strain
C. fracture stress
D. strain hardening
E. tensile strength - correct answer D. strain hardening
Engineering stress in the plastic region will be greater in which of the following
tests?
A. Compression test
B. tensile test
C. torsion test - correct answer A. Compression test
If engineering strain and true strain were measured simultaneously during a
tensile test, which would have the higher value?
A. engineering strain
B. true strain - correct answer A. engineering strain
During a compression test, the test specimen experiences a shape change
called which one of the following?
A. barreling
answers correctly solved
Which two of the following casting processes are expendable mold
operations?
A. centrifugal casting
B. Die casting
C. investment casting
D. low pressure casting
E. sand Casting
F. Slush casting - correct answer C. investment casting
E. sand Casting
Which one of the following best describes a tolerance?
A. clearance between a shaft and a mating hole
B. measurement error
c. total permissible variation from a specified dimension
d. Variation in manufacturing - correct answer C - total permissible variation
from a specified dimension
When a tolerance is specified in both the positive and negative directions from
the nominal dimension, it is called
A. bidirectional tolerance
B. bifurcated tolerance
C. bilateral tolerance
D. limit tolerance
E. symmetrical tolerance - correct answer C - bilateral tolerance
,Accuracy is the degree to which the measured value agrees with the true
value of the quantity of interest.
T/F - correct answer True
A batch of components is returned to the manufacturer with the claim that all
parts are outside tolerance, even though their dimensions are closely
clustered. In-process, 100% inspection had been made with a pneumatic
gauge. Can the complaint be correct?
Y/N - correct answer Yes
A surface plate is typically made of which one of the following materials?
A. aluminum oxide
B. cast iron
C. granite
D. hard poloymers
E. Stainless steel - correct answer C - granite
Surface roughness is defined as the average of the vertical deviations from
the nominal surface over a specified length.
T/F - correct answer True
Roughness and waviness are both deviations from the nominal surface in
defining surface texture. Which one has the larger spacing between
deviations?
A. roughness
B. Waviness - correct answer B - waviness
, The surface finish of a part is specified as 1.6μm Ra maximum. A handheld
stylus-type instrument gives readings in μm RMS. Should the maximum
permissible limit be greater or smaller than 1.60 μm?
A. Greater
B. Lower - correct answer A. Greater
The flow curve describes the property of metals known as which one of the
following?
A. ductility
B. engineering strain
C. fracture stress
D. strain hardening
E. tensile strength - correct answer D. strain hardening
Engineering stress in the plastic region will be greater in which of the following
tests?
A. Compression test
B. tensile test
C. torsion test - correct answer A. Compression test
If engineering strain and true strain were measured simultaneously during a
tensile test, which would have the higher value?
A. engineering strain
B. true strain - correct answer A. engineering strain
During a compression test, the test specimen experiences a shape change
called which one of the following?
A. barreling
