WorkKeys Applied Technology 1 — Questions and Answers
Question 1: A drive gear with 20 teeth meshes with a driven gear with 40 teeth. If the drive gear rotates at 60 RPM, what is the speed of the driven gear?
- 120 RPM
- 60 RPM
- 30 RPM (Correct answer)
- 15 RPM
Correct answer: 30 RPM
The driven gear speed equals the drive gear speed multiplied by the inverse gear ratio: 60 × (20/40) = 30 RPM.
Question 2: In an electrical circuit, which configuration allows current to flow through multiple separate paths simultaneously?
- Series circuit
- Parallel circuit (Correct answer)
- Open circuit
- Grounded circuit
Correct answer: Parallel circuit
A parallel circuit provides multiple independent paths for current, so electricity can flow through each branch simultaneously.
Question 3: A hydraulic piston has an area of 3 square inches and the system pressure is 400 PSI. What force does the piston exert?
- 133 lbs
- 400 lbs
- 800 lbs
- 1,200 lbs (Correct answer)
Correct answer: 1,200 lbs
Force equals pressure multiplied by area: F = 400 PSI × 3 in² = 1,200 lbs.
Question 4: A lever has a 12-foot effort arm and a 3-foot resistance arm. What is its mechanical advantage?
- 3
- 4 (Correct answer)
- 6
- 9
Correct answer: 4
Mechanical advantage of a lever equals the effort arm length divided by the resistance arm length: 12 ÷ 3 = 4.
Question 5: Which material is the best conductor of electricity among the following options?
- Rubber
- Wood
- Copper (Correct answer)
- Ceramic
Correct answer: Copper
Copper has very low electrical resistance and free electrons that move easily, making it an excellent conductor used widely in wiring.
Question 6: A single fixed pulley attached to a ceiling is used to lift a load. What does the pulley provide?
- Multiplies force and changes direction
- Changes direction of force only (Correct answer)
- Multiplies force only
- Reduces the weight of the load
Correct answer: Changes direction of force only
A single fixed pulley only redirects force (downward pull becomes upward lift) without providing any mechanical advantage.
Question 7: When a pipe gradually narrows, what happens to the velocity of the fluid flowing through it?
- Velocity decreases
- Velocity remains constant
- Velocity increases (Correct answer)
- Velocity reverses direction
Correct answer: Velocity increases
According to the continuity principle, fluid must speed up as it passes through a narrower cross-section to maintain the same flow rate.
WorkKeys Applied Technology 1
A drive gear with 20 teeth meshes with a driven gear with 40 teeth.
If the drive gear rotates at 60 RPM, what is the speed of the driven gear?