Mechanical Aptitude Hydraulics and Pneumatics 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 Hydraulics and Pneumatics flashcards as text
In a hydraulic system, if the input piston has an area of 2 sq in and the output piston has an area of 10 sq in, what is the mechanical advantage?
Answer: 5
Mechanical advantage equals output area divided by input area: 10 ÷ 2 = 5.
What type of valve controls the rate of fluid flow in a hydraulic circuit?
Answer: Flow control valve
A flow control valve regulates the speed of actuators by restricting or allowing fluid flow rate.
Which component in a pneumatic system removes moisture from compressed air?
Answer: Air dryer
An air dryer (or filter/dryer) removes water vapor from compressed air to prevent corrosion and damage.
What happens to fluid pressure when it passes through a restriction (orifice) in a hydraulic line?
Answer: Pressure decreases
According to Bernoulli's principle, fluid pressure drops as it passes through a restriction due to increased velocity.
A double-acting hydraulic cylinder differs from a single-acting cylinder because it:
Answer: Can be powered in both extend and retract directions
A double-acting cylinder uses hydraulic pressure to both extend and retract the rod, while a single-acting cylinder relies on a spring or gravity for one direction.
In pneumatics, what is the primary purpose of a lubricator in an FRL unit?
Answer: Add oil mist to protect moving parts
The lubricator adds a fine oil mist to compressed air to lubricate internal components of pneumatic tools and cylinders.
Which law states that pressure applied to a confined fluid is transmitted equally in all directions?
Answer: Pascal's Law
Pascal's Law states that pressure applied to an enclosed fluid is transmitted undiminished in all directions throughout the fluid.