Bennett Mechanical Test Comprehension 3 — Questions and Answers
Question 1: A large gear drives a small gear. The small gear will turn:
- Faster than the large gear (Correct answer)
- Slower than the large gear
- At the same speed
- In the same direction
Correct answer: Faster than the large gear
A smaller driven gear rotates faster than a larger driver gear.
Question 2: Two people carry a load on a pole. To make one person bear less weight, the load should be moved:
- Closer to the other person (Correct answer)
- To the exact middle
- Closer to the first person
- Off the pole
Correct answer: Closer to the other person
Moving the load toward someone increases their share of the weight, so move it away to reduce your own.
Question 3: Which object will float in water?
- A sealed empty plastic bottle (Correct answer)
- A solid steel block
- A brick
- A lead weight
Correct answer: A sealed empty plastic bottle
Objects less dense than water, like an air-filled bottle, float.
Question 4: An inclined ramp is used instead of lifting straight up. The ramp:
- Reduces the force needed over a longer distance (Correct answer)
- Reduces the total work to zero
- Increases the weight
- Requires more force than lifting
Correct answer: Reduces the force needed over a longer distance
A ramp trades less force for a longer travel distance.
Question 5: When two springs of equal strength are connected end to end and stretched, compared to one spring they:
- Stretch more for the same pull (Correct answer)
- Stretch less
- Do not stretch
- Break instantly
Correct answer: Stretch more for the same pull
Springs in series stretch more because each one extends.
Question 6: A flywheel is heavy and spins. Its main purpose is to:
- Store rotational energy and smooth motion (Correct answer)
- Reduce the machine's weight
- Increase friction
- Cool the engine
Correct answer: Store rotational energy and smooth motion
A flywheel's mass stores momentum to keep rotation steady.
Question 7: Cold weather causes a metal bridge to do what?
- Contract and become slightly shorter (Correct answer)
- Expand and lengthen
- Melt
- Float
Correct answer: Contract and become slightly shorter
Metals contract when cooled, shrinking in size.
Bennett Mechanical Test Comprehension 3
A large gear drives a small gear.
The small gear will turn: