Mechanical Aptitude Knowledge Flashcards
7 cards from real MECHANICAL APTITUDE practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Mechanical Aptitude Knowledge flashcards as text
A hydraulic jack uses a small piston with a 2 sq in area and a large piston with a 20 sq in area. If you apply 50 lbs on the small piston, what force does the large piston exert?
Answer: 500 lbs
Pascal's Law: force scales with the ratio of piston areas, so 50 × (20/2) = 500 lbs.
Which type of gear converts rotational motion into linear motion?
Answer: Rack and pinion
A rack and pinion converts the rotation of a pinion gear into straight-line (linear) motion of a rack.
A wrench handle is 12 inches long and you apply 15 lbs of force. What is the torque produced?
Answer: 15 ft-lbs
Torque = Force × Distance = 15 lbs × 1 ft (12 inches) = 15 ft-lbs.
A steel beam expands when heated. This property is called:
Answer: Thermal expansion
Thermal expansion is the tendency of materials to change in volume in response to temperature changes.
Which fastener is best suited for joining two pieces where disassembly will be needed frequently?
Answer: Machine screw with nut
Machine screws with nuts allow repeated assembly and disassembly without damaging the parts.
A fixed pulley at the top of a flagpole changes the:
Answer: Direction of the applied force
A single fixed pulley only changes the direction of force — it does not provide mechanical advantage.
Which material is the best electrical conductor?
Answer: Copper
Copper has very low electrical resistance and is widely used in wiring for its excellent conductivity.