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WorksheetsGW C12 TestPrep
Total questions: 51
Worksheet time: 26mins
Identify the choice that best completes the statement or answers the question. The six simple machines are ____.
lever, pulley, screwdriver, electric drill, hammer, and wrench
inclined plane, wedge, screw, hammer, screwdriver, and wrench
wheel and axle, wedge, lever, pulley, screw, and scissors
lever, pulley, wheel and axle, inclined plane, wedge, and screw
In a Class 1 lever ____.
the fulcrum is between the effort and the resistance
the effort is between the fulcrum and the resistance
the resistance is between the effort and fulcrum
both effort and the resistance are to the left of the fulcrum
In a Class 2 lever ____.
the effort is between the fulcrum and the resistance
the fulcrum is between the effort and the resistance
the resistance is always greater than the effort
the resistance is between the effort and fulcrum
In a Class 3 lever ____.
the resistance is always greater than the effort
the resistance is between the effort and fulcrum
the fulcrum is between the effort and the resistance
both the effort and the resistance are to one side of the fulcrum
Identify the choice that best completes the statement or answers the question. The turning force acting on a lever is called a ____.
movement
resistance
moment
twist
A linkage is a(n) ____.
simple machine used to move a mass
electrically powered device
system of levers used to transmit motion
pair of levers connected in a straight line
Identify the choice that best completes the statement or answers the question. A pulley is a special kind of ____.
wheel and axle
inclined plane
Class 1 lever
Class 3 lever
In a single, movable pulley system, ____.
the effort required is half the resistance
the effort must be four times the resistance
there is no mechanical advantage
the effort required is equal to the resistance
The disadvantage of a single, movable pulley is that the (a) .
mechanical advantage is zero
operator must pull upward
effort is double the resistance
effort distance is less than the resistance distance
A simple gear train contains a drive gear with 25 teeth and a driven gear with 125 teeth. How many times must the drive rotate for the driven to rotate once?
1
5
6
10
What is the gear ratio between two spur gears, one with 30 teeth and one with 120 teeth?
3:12
4:1
6:20
30:120
A gear with one tooth shaped like a screw thread is called a (a) gear.
spur
bevel
screw
worm
An eccentric cam causes ____.
reciprocal motion only
linear motion only
uneven linear motion
reciprocal linear motion
The period when a follower on a pear-shaped cam remains motionless is called (a) .
dwell
stoppage
resting
rotation
The formula to calculate pressure is (a) .
area ÷ effort
time ÷ work
effort ÷ area
work ÷ time
The formula to calculate power is (a) .
work ÷ time
effort ÷ area
time ÷ work
area ÷ effort
In the metric system, applied force is measured in (a) .
foot pounds
In the metric system, pressure is measured in (a) .
pascals
newtons
foot pounds
square meters
Which of the following is not an advantage of machines?
Increasing the speed of an operation.
Decreasing the amount of effort applied.
Changing the direction of an effort.
Using energy 100% efficiently.
A lawn mower and a knife are both examples of machines. True or False.
True
False
A wheelbarrow is an example of a Class 3 lever.
True
False
Mechanical advantage is equal to effort divided by resistance.
True
False
A wheel and axle contain an effort, fulcrum, and resistance. True or False.
True
False
The more gradual the rise of an inclined plane, the greater the effort required to move a load.
True
False
When two gears of different size mesh, the larger gear is called a wheel, and the smaller gear is called a pinion. True or False.
True
False
Mechanisms are often used to change one kind of motion into another kind. True or False.
True
False
To calculate pressure, divide area by effort. True or False.
True
False
The study of pressure in liquids is called pneumatics. True or False.
True
False
One of the effects of streamlining is to reduce air drag, which is a form of friction.
True
False
A device that uses energy to do work is called a(n) ______________________________.
machine
tool
appliance
gadget
A lever has a fulcrum, effort, and _________________________________
load
weight
force
mass
Using a smaller effort to move a large resistance creates _________________________________.
mechanical advantage
mechanical disadvantage
no effect
increased resistance
A transmission provides ________________________________ shifting, allowing speed to increase or decrease in speed without overworking an engine.
seamless
smooth
jerky
manual
For good lubrication, an oil must have the correct _________________________________.
viscosity
color
density
temperature
The use and study of liquid pressure in pipes to do work is called _________________________________.
Hydraulics
Pneumatics
Aerodynamics
Thermodynamics
The use and study of gas pressure in pipes to do work is called _________________________________.
Pneumatics
Hydraulics
Thermodynamics
Aerodynamics
What is friction?
A device that uses energy to do work.
A force that acts like a brake on moving objects.
A system of levers used to transmit motion.
A measure of the force transmitted by gears.
What is a gear?
A device consisting of a number of parts working together.
Rotating, wheel-like objects with teeth around their rims.
A simple machine used to increase force.
A kind of friction in liquids.
What is a lever?
A measure of the force transmitted by gears.
A wheel with a groove around its rim.
A device that uses energy to do work.
A simple machine used to increase force or decrease effort.
What is linkage?
A simple machine that consists of a wheel and axle.
A device consisting of a number of parts working together.
A system of levers used to transmit motion.
A kind of friction in liquids.
What is lubrication?
The application of a smooth or slippery substance between two objects.
The use and study of gas pressure in pipes to do work.
The rate at which energy is converted from one form to another.
The effort applied to a given area.
What is a machine?
A kind of friction in liquids.
A measure of the force transmitted by gears.
A simple machine used to increase force.
A device that uses energy to do some kind of work.
What is mechanical advantage?
The use of liquid pressure in pipes to do work.
Using a smaller effort to move a large resistance.
The rate at which work is done.
The application of a smooth substance to reduce friction.
What is a mechanism?
A measure of the force transmitted by gears.
A wheel with a groove around its rim.
A simple machine used to increase force.
A device consisting of a number of parts working together.
What is moment?
The use of gas pressure in pipes to do work.
The turning force acting on a lever.
The application of a smooth substance to reduce friction.
The rate at which energy is converted from one form to another.
What does pneumatics study?
The use of liquid pressure in pipes to do work.
The application of a smooth substance to reduce friction.
The use and study of gas pressure in pipes to do work.
The rate at which work is done.
What is pressure?
The rate at which work is done.
The effort applied to a given area.
The use of gas pressure in pipes to do work.
The application of a smooth substance to reduce friction.
What is a screw?
An inclined plane wrapped into the form of a cylinder.
A simple machine used to increase force.
A device consisting of a number of parts working together.
A measure of the force transmitted by gears.
What is torque?
The use of liquid pressure in pipes to do work.
The application of a smooth substance to reduce friction.
The rate at which work is done.
A measure of the force transmitted by gears.
What is viscosity?
The rate at which energy is converted from one form to another.
A kind of friction in liquids, or the thickness.
The application of a smooth substance to reduce friction.
The use of gas pressure in pipes to do work.
What is a wedge?
A special type of inclined plane, that is two back-to-back inclined planes.
A device consisting of a number of parts working together.
A simple machine used to increase force.
A measure of the force transmitted by gears.
