I have a couple true or false engineering questions? please help

16

The comparison of work output to work input is called the mechanical
advantage.
a. true
b. false



17

The work done by a machine is called the work output.
a. true
b. false



18

A second-class lever will always multiply distance.
a. true
b. false



19

A screw is an inclined plane wrapped around a cylinder.
a. true
b. false



20

A wheel and axle is a chain, belt, or rope wrapped around a wheel.
a. true
b. false

16

The comparison of work output to work input is called the mechanical
advantage.
a. true
b. false
ANS false
the stated ratio gives efficiency



17

The work done by a machine is called the work output.
a. true
b. false
ANS true



18

A second-class lever will always multiply distance.
a. true
b. false
ANS false
Examples: wheelbarrow multiplies force while fishing rod multiplies distance


19

A screw is an inclined plane wrapped around a cylinder.
a. true
b. false
ANS true


20

A wheel and axle is a chain, belt, or rope wrapped around a wheel.
a. true
b. false
ANS false - a doorknob is a wheel and axle