Mechanical Reasoning Flashcards
7 cards from real Ramsay Test 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 Reasoning flashcards as text
In a simple series circuit, three bulbs are connected to a 12V battery. One bulb burns out (open circuit). What happens to the other two?
Answer: They all go out
In a series circuit, a break anywhere stops current flow through the entire circuit, extinguishing all bulbs.
A rectangular beam is supported at both ends and loaded in the center. If the load is doubled, the deflection at the center:
Answer: Doubles
For a simply supported beam within the elastic range, deflection is directly proportional to load — doubling the load doubles the deflection.
Ball bearings are used in machines primarily to:
Answer: Reduce rotational friction between moving parts
Ball bearings replace sliding friction with rolling friction, dramatically reducing energy lost between a rotating shaft and its housing.
A cam is used in a machine to convert:
Answer: Rotary motion into controlled linear or reciprocating motion
A cam converts rotational input into a precisely shaped linear or reciprocating output motion as the follower tracks the cam profile.
A 500 lb load is placed on a piston with a face area of 25 square inches. What is the pressure in the hydraulic system?
Answer: 20 PSI
Pressure = Force / Area = 500 lb ÷ 25 sq in = 20 PSI.
A ratchet mechanism allows a gear to:
Answer: Rotate in one direction only, preventing reversal
A ratchet uses a pawl that engages gear teeth to allow motion in one direction while blocking reverse rotation.
Which of the following changes would MOST increase the mechanical advantage of a wheel and axle?
Answer: Making the wheel larger relative to the axle
Mechanical advantage of a wheel and axle = wheel radius / axle radius, so increasing wheel size or decreasing axle size raises the advantage.