Bennett Mechanical Test Structures and Center of Gravity 3

Question 1

A triangular shelf bracket transfers a load to the wall. Which member is typically in compression?

Accepted Answer

The diagonal brace

Answer

The screw heads

Answer

The wall paint

Answer

None of them

Question 2

Where is the center of gravity of a uniform L-shaped flat plate?

Accepted Answer

Outside the material of the L

Answer

At the inner corner

Answer

At the longest tip

Answer

At the exact midpoint of one arm

Question 3

A loaded wheelbarrow is easier to lift when the load is placed where relative to the wheel?

Accepted Answer

Directly over the wheel

Answer

Far behind near the handles

Answer

On the handles

Answer

It makes no difference

Question 4

A balanced see-saw has a 40 lb child 4 ft from the pivot. Where must a 20 lb child sit to balance?

Accepted Answer

8 ft from the pivot

Answer

4 ft from the pivot

Answer

2 ft from the pivot

Answer

1 ft from the pivot

Question 5

A flat tabletop rests on four legs. The combined center of gravity of the table is best described as?

Accepted Answer

Above the center of the tabletop

Answer

At one corner leg

Answer

Below the floor

Answer

Outside the table

Question 6

When stacking irregular rocks into a stable cairn, you should place the heaviest rocks where?

Accepted Answer

At the base

Answer

At the very top

Answer

Balanced on edges

Answer

Randomly

Question 7

A bridge arch carries load primarily through which type of internal force?

Accepted Answer

Compression

Answer

Tension

Answer

Twisting only

Answer

No force