ENMF 417 Midterm Exam
PART I. Multiple Choice Questions (Choose the most appropriate answer)
1 a Which of the following method is the optimum process to join multiple razor
blades?
a. Laser welding
b. MIG
c. Spot Welding
d. TIG
2 c Which would be the inappropriate tool material for turning of hardened
steel workpiece?
a. Cermets
b. WC
c. PCD
d. CBN
3 d Which of the following does not fall into the non-destructive testing
category?
a. Radiography (X-ray)
b. Eddie current
c. MFL
d. CVD
4 d Which of the following is incorrect about surface integrity?
a. Strain hardening
b. Cracks
c. Phase transition
d. Toughness
5 b A broaching operation is best described as:
a. A rotating tool moves past a stationary workpiece
b. A tool with multiple teeth moves linearly past a stationary workpiece
c. A workpiece is fed past a rotating cutting tool
d. A workpiece moves linearly past a stationary single-point tool.
6 d For a tensile test of a material, the strain at fracture is a measure of its
?
a. Elasticity
b. Resilience
c. Uniform elongation
d. Ductility
7 b In milling, which operation gives better surface finish, assuming that other
parameters stay same?
a. Up milling
b. Down milling
c. Neither
ENMF417 Pg. 1
, 8 d Which of the following is not types of abrasive?
a. Aluminum oxide
b. Silicon carbide
c. Diamond
d. Cermet
9 d Which of the following is incorrect regarding the following statement
“Chemical requirements of a soldering flux include…”
a. Low Melting Point
b. Low Viscosity
c. Chemical reactivity to dissolve surface oxides
d. None of the above
10 a Which of the following is the correct approach to minimize chatter?
a. Run spindle at the natural frequency
b. Increase the depth of cut
c. Decrease stiffness and damping capacity of the tool
d. Decrease the stiffness of workpiece holding device
11 b Which of the following is the most suitable process to manufacture a stent?
a. Electron beam machining
b. Laser beam machining
c. Electrochemical machining
d. Water jet machining
12 d Select the best description for toughness.
a. Area under the elastic region of the stress-strain curve
b. Length of the stress-strain curve
c. UTS of the stress-strain curve
d. Entire area under the stress-strain curve
13 b Which temperature distinguishes between soldering and brazing?
a. 350 °C
b. 450 °C
c. 750 °C
d. 1100 °C
14 b Holes made by a drilling process are often finished by what operation?
e. Grinding
f. Reaming
g. Shaping
h. Milling
15 d Which of following is the incorrect statement about residual stress?
a. Leads to warpage
b. Stress remains within a part after deformation
c. Due to phase change of materials
d. Due to uniform cooling for welding
ENMF417 Pg. 2
PART I. Multiple Choice Questions (Choose the most appropriate answer)
1 a Which of the following method is the optimum process to join multiple razor
blades?
a. Laser welding
b. MIG
c. Spot Welding
d. TIG
2 c Which would be the inappropriate tool material for turning of hardened
steel workpiece?
a. Cermets
b. WC
c. PCD
d. CBN
3 d Which of the following does not fall into the non-destructive testing
category?
a. Radiography (X-ray)
b. Eddie current
c. MFL
d. CVD
4 d Which of the following is incorrect about surface integrity?
a. Strain hardening
b. Cracks
c. Phase transition
d. Toughness
5 b A broaching operation is best described as:
a. A rotating tool moves past a stationary workpiece
b. A tool with multiple teeth moves linearly past a stationary workpiece
c. A workpiece is fed past a rotating cutting tool
d. A workpiece moves linearly past a stationary single-point tool.
6 d For a tensile test of a material, the strain at fracture is a measure of its
?
a. Elasticity
b. Resilience
c. Uniform elongation
d. Ductility
7 b In milling, which operation gives better surface finish, assuming that other
parameters stay same?
a. Up milling
b. Down milling
c. Neither
ENMF417 Pg. 1
, 8 d Which of the following is not types of abrasive?
a. Aluminum oxide
b. Silicon carbide
c. Diamond
d. Cermet
9 d Which of the following is incorrect regarding the following statement
“Chemical requirements of a soldering flux include…”
a. Low Melting Point
b. Low Viscosity
c. Chemical reactivity to dissolve surface oxides
d. None of the above
10 a Which of the following is the correct approach to minimize chatter?
a. Run spindle at the natural frequency
b. Increase the depth of cut
c. Decrease stiffness and damping capacity of the tool
d. Decrease the stiffness of workpiece holding device
11 b Which of the following is the most suitable process to manufacture a stent?
a. Electron beam machining
b. Laser beam machining
c. Electrochemical machining
d. Water jet machining
12 d Select the best description for toughness.
a. Area under the elastic region of the stress-strain curve
b. Length of the stress-strain curve
c. UTS of the stress-strain curve
d. Entire area under the stress-strain curve
13 b Which temperature distinguishes between soldering and brazing?
a. 350 °C
b. 450 °C
c. 750 °C
d. 1100 °C
14 b Holes made by a drilling process are often finished by what operation?
e. Grinding
f. Reaming
g. Shaping
h. Milling
15 d Which of following is the incorrect statement about residual stress?
a. Leads to warpage
b. Stress remains within a part after deformation
c. Due to phase change of materials
d. Due to uniform cooling for welding
ENMF417 Pg. 2
