# Physical Science

## Chapter 5: Work and Machines

### Section 3 Self-Check Quiz-Eng.

 1 A __________ is a device that does work with only one movement. Need a Hint? A) compound machine B) hand-operated machine C) force multiplier D) simple machine 2 A(n) __________ is a bar that is free to pivot about a fixed point. Need a Hint? A) pulley B) lever C) inclined plane D) screw 3 Which of the following describes a first-class lever? Need a Hint? A) resistance force located between the effort force and fulcrum B) effort force located between the resistance force and fulcrum C) fulcrum located between the effort and resistance forces D) effort force and resistance force in same location 4 Which of the following statements about levers is true? Need a Hint? A) Second-class levers always multiply force. B) Third-class levers always multiply force. C) Second-class levers always change the direction of the applied force. D) Third-class levers can multiply but not change the direction of the applied force. 5 A(n) __________ is a grooved wheel with a rope, chain or cable running along the groove. Need a Hint? A) screw B) wedge C) axle D) pulley 6 A(n) __________ is a simple machine that consists of two wheels that rotate together. Need a Hint? A) movable pulley B) hand-operated can opener C) inclined plane D) wheel and axle 7 Which of the following simple machines is an inclined plane wrapped around a post? Need a Hint? A) screw B) wedge C) lever D) wheel 8 Which of the following tools is a wedge? Need a Hint? A) knife B) screw C) bottle opener D) wheelbarrow 9 A __________ is a modified form of the wheel and axle that has two wheels of different sizes with interlocking teeth. Need a Hint? A) gear B) pulley C) screw D) wheelbarrow 10 If a pulley is attached to something that doesn't move, what is it called? Need a Hint? A) stuck B) fixed C) block and tackle D) moveable