Bennett Mechanical Test Comprehension 2 — Questions and Answers
Question 1: Two gears mesh together. If the driver gear turns clockwise, which way does the driven gear turn?
- Counterclockwise (Correct answer)
- Clockwise
- It stops
- Both directions
Correct answer: Counterclockwise
Meshing gears always rotate in opposite directions.
Question 2: A lever has its load close to the fulcrum and effort far away. What does this arrangement provide?
- A mechanical advantage that reduces effort needed (Correct answer)
- More speed at the load
- No change in force
- Increased load weight
Correct answer: A mechanical advantage that reduces effort needed
A longer effort arm relative to the load arm reduces the force required.
Question 3: Water flows through a pipe that narrows. What happens to the water's speed in the narrow section?
- It increases (Correct answer)
- It decreases
- It stays the same
- It stops
Correct answer: It increases
The same volume forced through a smaller area must move faster.
Question 4: Which surface produces the most friction when an object slides across it?
- Rough concrete (Correct answer)
- Polished glass
- Wet ice
- Oiled metal
Correct answer: Rough concrete
Rougher surfaces create more friction than smooth or lubricated ones.
Question 5: A pulley system uses two supporting rope sections to lift a load. How does this affect the effort needed?
- It roughly halves the effort (Correct answer)
- It doubles the effort
- It has no effect
- It triples the effort
Correct answer: It roughly halves the effort
Each supporting rope section shares the load, reducing required effort.
Question 6: Hot air inside a sealed balloon will cause the balloon to do what?
- Expand and rise (Correct answer)
- Shrink and sink
- Stay exactly the same
- Freeze
Correct answer: Expand and rise
Heated air expands and becomes less dense, causing it to rise.
Question 7: If a wrench handle is made longer, turning a tight bolt becomes:
- Easier (Correct answer)
- Harder
- Impossible
- Unchanged
Correct answer: Easier
A longer handle increases torque, making the bolt easier to turn.
Bennett Mechanical Test Comprehension 2
Two gears mesh together.
If the driver gear turns clockwise, which way does the driven gear turn?