Mechanical Aptitude Principles 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 Principles flashcards as text
A screwdriver with a handle diameter of 3 inches turns a screw with shaft diameter of 0.5 inches. What is the mechanical advantage?
Answer: 6
MA of a wheel and axle = radius of wheel / radius of axle = 1.5 / 0.25 = 6.
Which of the following materials is the BEST conductor of heat?
Answer: Copper
Copper has high thermal conductivity and is widely used in heat exchangers and cookware.
A drive belt connects a 6-inch pulley to a 3-inch pulley. If the larger pulley turns at 200 RPM, how fast does the smaller pulley turn?
Answer: 400 RPM
Speed ratio is inverse of diameter ratio: 200 × (6/3) = 400 RPM.
What does a torque wrench measure?
Answer: The rotational force applied to a fastener
A torque wrench measures the rotational force (torque) applied to a fastener to ensure proper tightening.
In a closed container, if the temperature of a gas doubles (in Kelvin) while volume stays constant, what happens to pressure?
Answer: Pressure doubles
Gay-Lussac's Law states pressure is directly proportional to temperature at constant volume: doubling T doubles P.
Which gear type is used when the two shafts are at right angles to each other?
Answer: Bevel gear
Bevel gears are cone-shaped and designed to transmit power between shafts that intersect at an angle, typically 90°.
A circuit has a 12V battery and a 4-ohm resistor. What is the current flowing through the circuit?
Answer: 3 A
Ohm's Law: I = V / R = 12 / 4 = 3 amperes.