Mechanical Aptitude Flashcards
7 cards from real EIAT 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 flashcards as text
What is the primary purpose of lubrication in a mechanical system?
Answer: Reduce friction, prevent wear, and dissipate heat between moving parts
Lubrication creates a film between moving surfaces that reduces friction, minimizes wear, and carries away heat generated by contact.
An inclined plane is 12 feet long and raises a load 3 feet high. Ignoring friction, what is the mechanical advantage?
Answer: 4
Mechanical advantage of an inclined plane equals the length divided by the height: 12 ÷ 3 = 4.
Which of the following would increase the tension in a drive belt to prevent slipping?
Answer: Adding a tensioner pulley or increasing center distance
A tensioner pulley or increasing center distance adds slack-side tension to the belt, improving the grip and preventing slippage.
A solid steel shaft will resist twisting (torsion) better than a hollow shaft of the same outer diameter because:
Answer: The statement is false — a hollow shaft with the same outer diameter often resists torsion nearly as well per unit weight
A hollow shaft of equal outer diameter has nearly the same torsional rigidity as a solid one because material near the center contributes little to torsional resistance.
When inspecting an elevator machine room, you notice oil leaking from a shaft seal. The FIRST corrective action should be:
Answer: Clean up the oil and identify the leak source before taking further action
The correct first step is to clean the area and identify the leak source to determine severity before deciding on the repair approach.
In a roped hydraulic elevator, what is the purpose of the roping?
Answer: To multiply the travel distance of the plunger using a mechanical advantage
Roping in a roped hydraulic elevator allows the cab to travel farther than the cylinder stroke by using a pulley-based mechanical advantage ratio.
What does a torque wrench measure?
Answer: The rotational force applied to a fastener
A torque wrench measures the rotational force (torque) being applied to a fastener to ensure it is tightened to the specified value.