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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
work input
B
speed or distance
C
work output
D
force
2) To find actual mechanical advantage for a wheel and axle, you would divide the...
A
input force by output force
B
output distance by input distance
C
output force by input force
D
input distance by output distance
3) When resistance is present, which of these is greater?
A
all choices are incorrect
B
work input
C
they are both the same
D
work output
4) Rotational work equals the input torque applied times the
A
input angle
B
output torque
C
input force
D
IMA
5) A chain hoist used in a garage is an example of a
A
friction drive
B
belt drive
C
wheel and axle
D
gear 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 decreases
B
it could either increase or decrease
C
it doesn't change
D
it increases
7) The actual mechanical advantage of a belt drive system when friction is present is equal to the
A
ratio of forces
B
ratio of torques
C
IMA
D
ratio of wheel and pulley radii
8) What part of a gear train transfers motion without adding or removing energy from the system?
A
the drive gear
B
the idler gear
C
the torque converter
D
the driven gear
9) The ideal mechanical advantage of a gear drive system is equal to what?
A
the diameter of the input drum divided by the diameter of the output drum
B
the number of teeth on the driving wheel divided by the number of teeth on the driven wheel
C
the number of teeth on the driven gear
D
the product of all of the individual gear ratios
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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