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TEMS - What Is A Machine? Chapter 4.2 And 4.3
Test Description: This review covers machines (simple and compound).
Instructions: Answer all questions to get your test result.
1) What is a device that makes work easier by changing the size and direction of the force?
A
force
B
power
C
work
D
machine
2) Work done by a machine on an object is called....
A
input force (effort force)
B
work output
C
output force (resistance force)
D
work input
3) Work done by you on the machine is called...
A
force input
B
force output
C
work input
D
work output
4) What is the number of times the machine multiplies the effort force?
A
mechanical advantage
B
power
C
force
D
mechanical efficiency
5) What is the comparison of a machine's work output and work input
A
mechanical efficiency
B
mechanical advantage
C
force
D
power
6) What is the formula for mechanical advantage?
A
MA = output force/input force or MA = Fr/Fe
B
MA = input force/ output force or MA = Fe/Fr
C
W = F x d
D
MA = input force/output force
7) What prevents a machine from being 100 % efficient?
A
power
B
output force
C
friction
D
input force
8) What kind of machine is a see-saw?
A
inclined plane
B
second-class lever
C
first-class lever
D
third-class lever
9) When turning a screwdriver, it is used as a...
A
first-class lever
B
wheel and axle
C
second-class lever
D
inclined plane
10) What is the fixed point on a lever called?
A
input
B
fulcrum
C
axle
D
inclined plane
11) What is a simple machine made of two circular objects of different sizes? They turn together
A
Inclined Plane
B
Wedge
C
Wheel and Axle
D
Lever
12) What kind of machine has a fulcrum in between the input force and load (resistance)?
A
Third-class lever
B
Second-class lever
C
First-class lever
D
Fourth-class lever
13) What kind of machine has the input force in between the resistance and fulcrum?
A
second-class lever
B
third-class lever
C
wedge
D
first-class lever
14) What is a simple machine that has a grooved wheel that holds a rope and provides a mechanical advantage of one?
A
Single Movable pulley
B
Single fixed pulley
C
Block and Tackle
D
Wheel and Axle
15) What is a simple machine that has a straight, slanted surface?
A
Block and Tackle
B
Screw
C
Inclined plane
D
Lever
16) What is an inclined plane wrapped around a post?
A
screw
B
First-class lever
C
wedge
D
Second-class lever
17) What is a simple machine that has a grooved wheel that holds a rope and provides a mechanical advantage of two?
A
block and tackle
B
single-movable pulley
C
Lever
D
Single-fixed pulley
18) What kind of machine has a movable pulley and fixed pulley?
A
wedge
B
block and tackle
C
lever
D
screw
19) Tweezers are a good example of....
A
First-class lever
B
Third-class lever
C
pulley
D
Second-class lever
20) A nutcracker/lobster shell cracker is a good example of ....
A
Third-class lever
B
First-class lever
C
Second-class lever
D
Wheel and axle
*select an answer for all questions
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