EEI TECH EEI Tech Mechanical Concept 3

Question 1

A first-class lever has the effort 4 ft from the fulcrum and the load 1 ft from the fulcrum. What is its mechanical advantage?

Accepted Answer

4

Answer

1

Answer

0.25

Answer

5

Question 2

Which gear arrangement allows a driver and driven shaft to rotate in the SAME direction using gears alone?

Accepted Answer

Two gears with an idler gear between them

Answer

Two directly meshed gears

Answer

A single gear

Answer

A worm gear pair

Question 3

On a screw, the distance the screw advances in one full turn is called the:

Accepted Answer

Pitch

Answer

Diameter

Answer

Torque

Answer

Thread angle

Question 4

A 200 lb load sits on a frictionless inclined plane 10 ft long with a vertical rise of 2 ft. What is the ideal mechanical advantage?

Accepted Answer

5

Answer

2

Answer

10

Answer

0.2

Question 5

Which of the following best describes torque?

Accepted Answer

A rotational force that tends to cause rotation

Answer

A pulling force in a straight line

Answer

The speed of a rotating shaft

Answer

The weight of an object

Question 6

Water flows through a pipe that narrows from a wide section to a narrow section. In the narrow section the water:

Accepted Answer

Flows faster

Answer

Flows slower

Answer

Stops flowing

Answer

Changes direction

Question 7

A flywheel is used in machines primarily to:

Accepted Answer

Store rotational energy and smooth out speed variations

Answer

Increase friction

Answer

Reduce the weight of the machine

Answer

Generate electricity directly