Structures and Center of Gravity Flashcards
7 cards from real Bennett Mechanical Test practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Structures and Center of Gravity flashcards as text
A hanging sign is supported by a horizontal bar and a diagonal cable to the wall. The cable is in?
Answer: Tension
The cable holds the bar up by pulling, so it carries tension.
A uniform rod 10 ft long is balanced on a single support. The support must be at?
Answer: The 5 ft midpoint
A uniform rod balances at its center of gravity, the midpoint at 5 ft.
Raising the load high on a forklift makes the forklift?
Answer: Less stable and more likely to tip
Raising the load lifts the combined center of gravity, reducing stability and raising tip risk.
A retaining wall holds back soil. It is usually built thicker at the bottom because the pressure is?
Answer: Greatest at the bottom
Soil pressure increases with depth, so the wall is thickest where pressure is greatest at the base.
A weight hangs from two ropes forming a wide V. Compared to ropes hanging nearly vertical, the wide-V ropes carry?
Answer: More tension
As the angle between supporting ropes widens, the tension in each rope increases for the same weight.
Which has the lower center of gravity: a race car or a passenger van of equal weight?
Answer: The race car
A low, flat race car has a lower center of gravity than a tall van.
A diving board is a cantilever. The point of greatest bending stress is?
Answer: At the fixed support end
A cantilever experiences the greatest bending moment and stress at the fixed support.