Bennett Mechanical Test Structures and Center of Gravity 5

Question 1

A hanging sign is supported by a horizontal bar and a diagonal cable to the wall. The cable is in?

Accepted Answer

Tension

Answer

The cable holds the bar up by pulling, so it carries tension.

Question 2

A uniform rod 10 ft long is balanced on a single support. The support must be at?

Accepted Answer

The 5 ft midpoint

Answer

A uniform rod balances at its center of gravity, the midpoint at 5 ft.

Question 3

Raising the load high on a forklift makes the forklift?

Accepted Answer

Less stable and more likely to tip

Answer

Raising the load lifts the combined center of gravity, reducing stability and raising tip risk.

Question 4

A retaining wall holds back soil. It is usually built thicker at the bottom because the pressure is?

Accepted Answer

Greatest at the bottom

Answer

Soil pressure increases with depth, so the wall is thickest where pressure is greatest at the base.

Question 5

A weight hangs from two ropes forming a wide V. Compared to ropes hanging nearly vertical, the wide-V ropes carry?

Accepted Answer

More tension

Answer

As the angle between supporting ropes widens, the tension in each rope increases for the same weight.

Bennett Mechanical Test Practice Test