Mechanical Aptitude Ultimate 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 Ultimate flashcards as text
Which class of fit describes two mating parts where the shaft is always smaller than the hole, guaranteeing clearance for easy assembly?
Answer: Clearance fit
A clearance fit ensures the shaft is always smaller than the hole across all tolerance conditions, allowing easy sliding or rotation.
What does a manometer measure?
Answer: Fluid pressure by the height of a liquid column
A manometer measures pressure by balancing it against the weight of a liquid column, with height proportional to pressure.
A ramp (inclined plane) is 10 feet long and 2 feet high. What is the mechanical advantage?
Answer: 5
Mechanical advantage of an inclined plane = length / height = 10/2 = 5, meaning you apply 1/5 the force over 5× the distance.
Which property of a material describes its ability to be drawn into wire without breaking?
Answer: Ductility
Ductility is the ability to deform under tensile stress without fracturing, which is required to draw a material into wire.
In a planetary gear system, if the ring gear is fixed and the sun gear is the input, which component is the output?
Answer: Planet carrier
With the ring gear held stationary and the sun gear driven, the planet gears walk around inside the ring gear, carrying their carrier as the output.
A pump moves 5 gallons per minute against a pressure of 120 PSI. Which change would most increase the system's flow rate without changing the pump?
Answer: Increase the pipe diameter
Larger pipe diameter reduces friction losses (head loss), lowering system resistance and allowing more flow at the same pump output.
What is the primary purpose of a thrust bearing?
Answer: To support axial (longitudinal) loads along the shaft axis
Thrust bearings are designed specifically to resist forces acting parallel to the shaft axis (axial loads), preventing the shaft from sliding forward or backward.