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7.2
Test Description: Force Transformers in Rotational Mechanical Systems
Instructions: Answer all questions to get your test result.
1) Rotational force transformers usually amplify or increase what?
A
speed or distance
B
force
C
work output
D
work input
2) To find actual mechanical advantage for a wheel and axle, you would divide the...
A
output force by input force
B
input force by output force
C
input distance by output distance
D
output distance by input distance
3) When resistance is present, which of these is greater?
A
they are both the same
B
work output
C
all choices are incorrect
D
work input
4) Rotational work equals the input torque applied times the
A
input force
B
output torque
C
IMA
D
input angle
5) A chain hoist used in a garage is an example of a
A
belt drive
B
wheel and axle
C
gear drive
D
friction drive
6) If you increase the torque on the output pulley of a belt and pulley drive, without changing the amount of work done, what happens to the speed of the output pulley?
A
it increases
B
it doesn't change
C
it could either increase or decrease
D
it decreases
7) The actual mechanical advantage of a belt drive system when friction is present is equal to the
A
ratio of torques
B
ratio of forces
C
ratio of wheel and pulley radii
D
IMA
8) What part of a gear train transfers motion without adding or removing energy from the system?
A
the drive gear
B
the torque converter
C
the idler gear
D
the driven gear
9) The ideal mechanical advantage of a gear drive system is equal to what?
A
the number of teeth on the driven gear
B
the product of all of the individual gear ratios
C
the number of teeth on the driving wheel divided by the number of teeth on the driven wheel
D
the diameter of the input drum divided by the diameter of the output drum
10) The ideal mechanical advantage of a force transformer is always
A
equal to the ratio of Force Out to Force In
B
dependent on the presence or absence of friction
C
less than the actual mechanical advantage
D
equal to or greater than the actual mechanical advantage
*select an answer for all questions
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