Manufacturing Engineering Multiple Choice Questions on “Shaper Mechanism”.
1. Which of the following shaper machine cuts in return stroke?
a) Vertical shaper
b) Horizontal shaper
c) Draw cut shaper
d) Universal shaper
Answer: c
Clarification: Draw cut shaper cuts in the return stroke. While in general cutting takes place in forward stroke.
2. Slotted link of crank and slotted lever mechanism is also known as
a) Lever
b) Rocker
c) Crank
d) None of the mentioned
Answer: b
Clarification: As slotted arm does not make complete revolution during cutting, hence it is also known as rocker.
3. Slotted link of crank and slotted link mechanism is pivoted to
a) Fulcrum
b) Lever
c) Tool
d) None of the mentioned
Answer: a
Clarification: Slotted link is pivoted to fulcrum. Slotted arm does not make complete revolution during cutting.
4. Time of return stroke is ________ the time of forward stroke in crank and slotted link mechanism.
a) Less than
b) More than
c) Equal to
d) None of the mentioned
Answer: a
Clarification: of return stroke is less than the time of forward stroke in crank and slotted link mechanism. It reduces the time of idle stroke.
5. In crank and slotted link mechanism, cutting angle is 220 degrees. What should be the return stroke angle?
a) 12
b) 90
c) 140
d) 360
Answer: c
Clarification: Return stroke angle = 360 – cutting angle. Cutting takes place in forward stroke.
6. In a crank and slotted lever mechanism, length of fixed link and crank is 250 mm and 100 mm respectively. Inclination of slotted lever with vertical at extreme position in degrees is equal to
a) 25
b) 23.6
c) 28.3
d) 20
Answer: b
Clarification: Use simple geometry in a triangle. Return stroke angle = 360 – cutting angle.
7. In a crank and slotted lever mechanism, length of fixed link and crank is 250 mm and 100 mm respectively. Ratio of cutting stroke time to return stroke time will be
a) 5
b) 2.6
c) 1.7
d) 0
Answer: c
Clarification: Ratio of cutting stroke time to return stroke time = (cutting angle/return angle).
8. In a crank and slotted lever mechanism, length of fixed link and crank is 250 mm and 100 mm respectively. Cutting angle in degrees is equal to
a) 47.2
b) 12.3
c) 56
d) 69.3
Answer: a
Clarification: Use simple geometry in a triangle to find cutting angle.Return stroke angle = 360 – cutting angle.
9. In a crank and slotted lever mechanism, length of fixed link and crank is 250 mm and 100 mm respectively. Return angle in degrees is equal to
a) 147.2
b) 112.3
c) 156
d) 132.8
Answer: d
Clarification: Use simple geometry in a triangle to find cutting angle. Return stroke angle = 360 – cutting angle.
10. In a crank and slotted lever mechanism, length of fixed link and crank is 250 mm and 100 mm respectively. Length of stroke in mm will be
a) 447.2
b) 312.3
c) 56
d) 360.3
Answer: d
Clarification: Use simple geometry in a triangle to find cutting angle. Return stroke angle = 360 – cutting angle. Cutting angle = 47.2 degree.