Free Printable PLTW POE Semester 1 Review Part 1

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Worksheets

PLTW POE Semester 1 Review Part 1

Total questions: 26

Worksheet time: 2hrs 41mins

Name

Class

Date

1.

What is the definition of isometric?

a)

A method of projection in which a 3D object is presented by a drawing having all three axes equally inclined and all lines drawn to scale.

b)

A rigid bar used to exert a pressure or sustain a weight at one point of its length by the application of a force at a second and turning at a third on a fulcrum.

c)

The structure of or the relationship of the parts in a machine, or in a construction or process comparable to a machine.

d)

The turning effect of a force about a point equal to the magnitude of the force times the perpendicular distance from the point to the line of action from the force.

2.

What is the definition of lever?

a)

A method of projection in which a 3D object is presented by a drawing having all three axes equally inclined and all lines drawn to scale.

b)

A rigid bar used to exert a pressure or sustain a weight at one point of its length by the application of a force at a second and turning at a third on a fulcrum.

c)

The structure of or the relationship of the parts in a machine, or in a construction or process comparable to a machine.

d)

The turning effect of a force about a point equal to the magnitude of the force times the perpendicular distance from the point to the line of action from the force.

3.

What is the definition of mechanism?

a)

A method of projection in which a 3D object is presented by a drawing having all three axes equally inclined and all lines drawn to scale.

b)

A rigid bar used to exert a pressure or sustain a weight at one point of its length by the application of a force at a second and turning at a third on a fulcrum.

c)

The structure of or the relationship of the parts in a machine, or in a construction or process comparable to a machine.

d)

The turning effect of a force about a point equal to the magnitude of the force times the perpendicular distance from the point to the line of action from the force.

4.

What is the definition of pitch?

a)

Distance between adjacent threads in a screw.

b)

A type of lever that is a wheel with a groove in its rim, which is used to change the direction or multiply a force exerted by a rope or cable.

c)

Impeding effect exerted by one material object on another.

d)

An inclined plane wrapped around a cylinder, forming the path and pitch.

5.

What is the definition of pulley?

a)

Distance between adjacent threads in a screw.

b)

A type of lever that is a wheel with a groove in its rim, which is used to change the direction or multiply a force exerted by a rope or cable.

c)

Impeding effect exerted by one material object on another.

d)

An inclined plane wrapped around a cylinder, forming the path and pitch.

6.

What is the definition of resistance force?

a)

Distance between adjacent threads in a screw.

b)

A type of lever that is a wheel with a groove in its rim, which is used to change the direction or multiply a force exerted by a rope or cable.

c)

Impeding effect exerted by one material object on another.

d)

An inclined plane wrapped around a cylinder, forming the path and pitch.

7.

What is the definition of screw?

a)

Distance between adjacent threads in a screw.

b)

A type of lever that is a wheel with a groove in its rim, which is used to change the direction or multiply a force exerted by a rope or cable.

c)

Impeding effect exerted by one material object on another.

d)

An inclined plane wrapped around a cylinder, forming the path and pitch.

8.

What is the definition of simple machine?

a)

Any of various elementary mechanisms including the lever, the wheel and axle, the pulley, the inclined plane, the wedge, and the screw.

b)

A type of lever that is a wheel with a groove in its rim, which is used to change the direction or multiply a force exerted by a rope or cable.

c)

Impeding effect exerted by one material object on another.

d)

An inclined plane wrapped around a cylinder, forming the path and pitch.

9.

What is the definition of torque?

a)

A force that produces or tends to produce rotation or torsion.

b)

A type of lever that is a wheel with a groove in its rim, which is used to change the direction or multiply a force exerted by a rope or cable.

c)

Impeding effect exerted by one material object on another.

d)

An inclined plane wrapped around a cylinder, forming the path and pitch.

10.

Tommy and Jimmy are on a seesaw like the picture. Tommy weighs 40 lb and Jimmy weighs 30 lb. What is the Mechanical Advantage when Jimmy makes the two boys level?

a)

1.3

b)

0.75

c)

1

d)

120

11.

The stairs leading up a lighthouse are shaped like a screw. If the pitch of the stairway was 1/0.005 and the radius of the stairway was 3ft, how much is the ideal mechanical advantage? Remember IMA = (2piR)/pitch

a)

1.0

b)

0.015

c)

0.04

d)

0.09

12.

David wants to lift Moses using a moveable pulley. If Moses weighs 150 lbs, and David uses a force of 30 lbs, how much is the mechanical advantage?

a)

10

b)

450

c)

5

d)

8

13.

When speed decreases, what happens to the value of torque?

a)

increases

b)

decreases

c)

stays constant

14.

When speed increases, what happens to the value of torque?

a)

increases

b)

decreases

c)

stays constant

15.

Simplify the ratio of
35 : 14

a)

5 : 2

b)

2 : 5

c)

3 : 1

d)

35: 14

16.

When the output gear is larger than the input gear you have.....

a)

Increased Speed, decreased torque

b)

Increased Torque, decreased speed

17.

In a regular Gear Train, only the driver and the driven gear matters in the calculation of the gear ratio

a)

True

b)

False

18.

What is the mechanical advantage of this pulley?

a)

.5

b)

1

c)

1.5

d)

2

19.

What is the mechanical advantage of this pulley system?

a)

4

b)

6

c)

8

d)

10

20.

Chain drive gears turn in the __________ direction.

a)

Opposite

b)

Same

c)

Oscilating

d)

Linear

21.

How do you calculate the area of this shape?

a)

$side\ length^2$

b)

$width\ \cdot\ height$

c)

$\pi r^2$

d)

$\frac{1}{2}\left(base\ \cdot\ height\right)$

e)

$\frac{1}{2}\left(\pi r^2\right)$

22.

Using the equation for the moment of inertia above, find the base of a piece of wood that has moment of inertia 21 and height 5.5.

a)

1.5

b)

2

c)

1

d)

15

23.

A LOW modulus of elasticity means...

a)

a greater resistance to deformation

b)

a lower resistance to deformation

c)

a greater resistance to strain

d)

a lower resistance to strain

24.

The centroid of an object is...

a)

its center of gravity or center of mass

b)

its center point

c)

its balancing point

25.

Two kids are sitting on a see-saw. On one side, there is a person 3 m away from the fulcrum with a weight of 600 N. On the other side, is a person weighing 450 N. How far away must the second person sit in order for the see-saw to be at equilibrium?

a)

4 m

b)

2 m

c)

3.5 m

d)

5 m

26.

The deflection of the beam is ___ the Modulus of Elasticity.

a)

directly proportional to

b)

inversely proportional to

c)

equal to

d)

not dependent on

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