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Advanced Manufacturing I Mechanisms 4
Test Description: Mechanisms set 4
Instructions: Answer all questions to get your test result.
1) Gravity provides the acceleration of a falling object's force. Around the Earth, this acceleration is constant. What is it?
A
9.8 miles per hour
B
30 ft/second squared
C
9.8 m/second squared
D
98 m/second squared
2) When turning a wheel that is attached to an axle, which of the following happens?
A
The axle also moves
B
The input force is increased along the edge of the wheel
C
The wheel spins on its own, while the axle remains unaffected
D
Nothing. The wheel will only move if the axle is moved.
3) Which of the following shows the work output of an ideal mechanism?
A
Work Output = Work Input - Work Lost
B
Work Output = (mass x acceleration) x distance
C
Work Output = mass x 9.8 m/second squared
D
Work Output = Work Input
4) The formula W = (mass x 9.8 m/second squared)d would be used when attempting to find which of the following
A
How much work is being done by a falling object
B
the velocity of a falling object
C
how much work any mechanism might be capable of
D
force
5) What is the unit of measurement for work?
A
Ampere (A)
B
Joule (J)
C
Calorie
D
Newton (N)
6) How is the work a mechanism loses to friction calculated?
A
Work Output = Work Input - Work Lost
B
Work Output = Force x Distance
C
Work Output = Work Input + Work Lost
D
Work Output = Mass x Acceleration
7) Which of the following describes how mechanical advantage can change the initial force put into a tool.
A
changing its direction only
B
Multiplying it, changing its type, changing its direction
C
Multiplying it only
D
Equaling it
8) Calculate the mechanical advantage of a wheel and axle with the following attributes. Radius of wheel = 3 cm and radius of axle = 0.3 cm
A
1
B
0.9
C
0.1
D
10
9) Which of the following terms describes the distance between a screw's threads?
A
radius
B
helix
C
lead
D
pitch
10) A pulley system is made up of two pulleys and four sections of rope that are acting on the load. What is the mechanical advantage of such a pulley system?
A
8
B
4
C
2
D
6
*select an answer for all questions
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