FCTC UPDATED EXAM SCRIPT QUESTIONS AND ANSWERS GRADED A+

FCTC UPDATED EXAM SCRIPT QUESTIONS AND ANSWERS
GRADED A+
✔✔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: - ✔✔see saw, crowbar, scissors

✔✔What is the mechanical advantage of a Class 1 lever? - ✔✔It may be greater than or
less than 1

✔✔Class 2 Lever - ✔✔Resistance in the middle.

Effort is applied on one side of the resistance and the fulcrum is located on the other
side.

✔✔Examples of Class 2 levers: - ✔✔Wheel barrow, a nutcracker, a bottle opener or the
brake pedal of a car

✔✔What is the mechanical advantage of a Class 2 lever? - ✔✔It is always greater than
1

✔✔Class 3 Lever - ✔✔Effort in the middle

The resistance is on one side of the effort and the fulcrum is located on the other side.

✔✔Examples of Class 3 levers - ✔✔tweezers or the human mandible

Mechanical advantage is always less than 1

✔✔FRE 123 - ✔✔Fulcrum in middle for 1st class
Resistance is in the middle for the 2nd lever
Effort is in the middle for the 3rd

✔✔HEAD - ✔✔pressure created by the force of gravity and is a function of the
difference in elevation between intake and output

✔✔Head is usually measured in - ✔✔pounds per square inch