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