FREE RCAT Mechanical Reasoning Questions and Answers

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Which type of gear system allows for the change of direction by 90 degrees?

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Bevel gears are designed to change the direction of a drive by 90 degrees.

Which tool is used to measure the diameter of a cylindrical object?

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A caliper is designed to measure the diameter of cylindrical objects accurately

If a wheel and axle system has a wheel radius of 0.5 meters and an axle radius of 0.1 meters, what is the mechanical advantage of the system?

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The mechanical advantage is the ratio of the wheel radius to the axle radius: 0.5 𝑚 / 0.1 m = 5 0.5 m / 0.1 m = 5.

What is the main function of a lever?

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A lever amplifies an input force to lift or move a heavier load.

If a 10N force is applied to a lever 2 meters from the fulcrum, what is the torque produced?

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Torque is calculated as force times distance from the fulcrum: 10 𝑁 × 2 𝑚 = 20 𝑁 𝑚 0N×2m=20Nm.

Which of the following mechanisms is used to maintain a constant speed of rotation?

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A flywheel is used to maintain a constant speed of rotation by storing rotational energy.

Which of the following statements about a block and tackle system is true?

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A block and tackle system decreases the force needed by distributing the load over multiple pulleys.

What type of simple machine is a screw?

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A screw is essentially an inclined plane wrapped around a cylinder.

If gear A has 20 teeth and gear B has 40 teeth, how many times will gear A rotate for every rotation of gear B?

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Gear A will rotate twice for every rotation of gear B because it has half the number of teeth.

In a pulley system, what effect does adding more pulleys have on the effort needed to lift a load?

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Adding more pulleys reduces the effort needed to lift a load by distributing the weight more evenly.

What is the purpose of a hydraulic press?

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A hydraulic press uses fluid pressure to lift or compress heavy objects.