4. Which simple machine retains or holds things together?
a. Lever
b. Pulley
c. wedge
d. screw

5. which simple machine is used in a variety of ways to lift loads, apply forces and transmit power?
a. Lever
b. Pulley
c. Wedge
d. Screw

6. which type of pulley allows you to raise the flag?
a. Fixed pulley
b. Movable pulley
c. Block and tackle pulley
d. Both fixed and movable pulley

7. Which simple machine has a mechanical advantage that is computed as the ratio of the resistance to the effort?
a. Wheel and axle
b. Pulley
c. Wedge
d. Screw

8. Which does not belong to the group?
a. Crank of a paper sharpener
b. Meat grinder
c. Door knob
d. Spoon

9. I'm the earliest time the simple machine was probably used to raising weights or water buckets from wells.
a. Wheel and axle
b. Pulley
c. wedge
d. Screw

10. which is the correct way of handling simple machine?
a. When carrying sharp and pointed tools, position the pointed edge upward.
b. When carrying sharp and pointed tools, position the pointed edge sidewards.
c. When carrying sharp and pointed tools, position the pointed edge downward.
d. When carrying sharp and pointed tools, position the pointed edge to your stomach.​