FREE Mechanical Aptitude MCQ Question and Answers Flashcards
6 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 6 FREE Mechanical Aptitude MCQ Question and Answers flashcards as text
A pipe with a large diameter connects to a pipe with a small diameter. As water flows from the large pipe into the small pipe, what happens to the flow velocity?
Answer: Velocity increases
According to the continuity equation, when the cross-sectional area decreases the fluid velocity must increase to maintain constant flow rate.
Which simple machine is best represented by a screw?
Answer: An inclined plane wrapped around a cylinder
A screw is fundamentally an inclined plane wrapped in a spiral around a central shaft.
Two springs with spring constants k1 = 100 N/m and k2 = 200 N/m are connected in parallel. What is the combined spring constant?
Answer: 300 N/m
Springs in parallel have their constants added, so the combined constant is 100 + 200 = 300 N/m.
A 10 kg object moves at 5 m/s. What is its kinetic energy?
Answer: 125 J
Kinetic energy = 0.5 × m × v² = 0.5 × 10 × 25 = 125 J.
What is the primary purpose of a flywheel in a mechanical system?
Answer: To store rotational energy and smooth out power delivery
A flywheel stores rotational kinetic energy and releases it to maintain consistent power output during fluctuations.
If a lever arm is 2 meters long and a force of 50 N is applied perpendicular to it, what is the torque about the pivot?
Answer: 100 N·m
Torque equals force times the perpendicular distance from the pivot, so 50 N × 2 m = 100 N·m.