FCTC Test Questions with 100% Correct
Answers
A belt and pulley system is characterized by
two or more pulleys in common to a belt.
What does a belt and pulley system allow for?
mechanical power, torque, and speed to be transmitted across axles
How is mechanical advantage realized?
if the pulleys are different diameters
what is a pulley?
a wheel on an axle or shaft that is designed to support movement and change of direction of a
cable or belt along its circumference
Why are pulleys used?
lift loads
apply forces
trasmit power
What is usually the drive element of a pulley?
rope, cable, belt or chain that runs over the pulley inside the groove
Pulleys are assembled to form what
a block and tackle in order to provide mechanical advantage to apply large forces
rope and pulley systems (block and tackle) are characterized by what?
, the use of a single continuous rope to transmit a tension force around one or more pulleys to
lift or move a load
the rope may be a light line or a strong cable
What is the mechanical advantage of a rope and pulley system if it does not dissipate or
store energy?
the number of parts of the rope that act on the load
What is a lever?
a machine consisting of a beam or rigid rod pivoted at a fixed hinge or fulcrum
How do levers work?
amplifies an input force to provide a greater output force, which is said to provide leverage
what is the mechanical advantage of a lever?
the ratio or the output force to the input force
How are levers classified?
by relative positions of the fulcrum and the input and output forces.
allows identification by the relative locations of the fulcrum, the resistance, and the effort.
Class 1 Lever
Fulcrum in the middle
the effort is applied on one side of the fulcrum and the resistance on the other side.
Examples of Class 1 levers:
Answers
A belt and pulley system is characterized by
two or more pulleys in common to a belt.
What does a belt and pulley system allow for?
mechanical power, torque, and speed to be transmitted across axles
How is mechanical advantage realized?
if the pulleys are different diameters
what is a pulley?
a wheel on an axle or shaft that is designed to support movement and change of direction of a
cable or belt along its circumference
Why are pulleys used?
lift loads
apply forces
trasmit power
What is usually the drive element of a pulley?
rope, cable, belt or chain that runs over the pulley inside the groove
Pulleys are assembled to form what
a block and tackle in order to provide mechanical advantage to apply large forces
rope and pulley systems (block and tackle) are characterized by what?
, the use of a single continuous rope to transmit a tension force around one or more pulleys to
lift or move a load
the rope may be a light line or a strong cable
What is the mechanical advantage of a rope and pulley system if it does not dissipate or
store energy?
the number of parts of the rope that act on the load
What is a lever?
a machine consisting of a beam or rigid rod pivoted at a fixed hinge or fulcrum
How do levers work?
amplifies an input force to provide a greater output force, which is said to provide leverage
what is the mechanical advantage of a lever?
the ratio or the output force to the input force
How are levers classified?
by relative positions of the fulcrum and the input and output forces.
allows identification by the relative locations of the fulcrum, the resistance, and the effort.
Class 1 Lever
Fulcrum in the middle
the effort is applied on one side of the fulcrum and the resistance on the other side.
Examples of Class 1 levers:
