ASVAB Section 8 – Mechanical Comprehension (MC)

A screw with 12 threads per inch has                    than a screw with 8 threads per inch.

A wrench is used to turn a bolt that has 20 threads per inch. After 15 complete turns of the wrench, the bolt will have moved

Water is flowing from a 3-inch pipe into a 2-inch pipe.  Pressure in the 2-inch pipe will be

Water is flowing into a tank through pipe A at 6 gallons per minute and through pipe B at 7 gallons per minute. The water is flowing out of the tank through pipe C at 8 gallons per minute.  How much more water will be in the tank at the end of 5 minutes?

Water is flowing into a tank through an upper faucet at the rate of 240 gallons per hour and draining out of the tank through a lower faucet at a rate of 1 gallon per minute. How many more gallons of water will be in the tank after 6 minutes?

A spring, a device that can resume its original shape after bending, is best made from which of the following materials?

A garden hose is used to siphon the water out of an above-ground swimming pool. What makes the water flow out of the pool and through the garden hose?

Water is flowing into a tank at the rate of 180 gallons per minute. However, the tank has a leak, and water is leaking out at the rate of 2 gallons per second. How long will it take to add 120 gallons?

A wrench uses which simple machine to turn a bolt?

On which of the following would a spring be used?

A fuel tank is receiving fuel at the rate of 1 gallon per minute. It is supplying an engine that uses 3 gallons per hour. How many gallons of fuel will be in the tank after 1/2 hour, assuming the tank was empty at the start?

If a bar of steel is heated it will                        .

Which of the following could be used to transfer water between two adjacent swimming pools?

To lift a 600-pound piano, Jeff and Scott decide to use a plank placed under one end of the piano. The plank is 3 feet long. If a fulcrum is placed under the plank, one foot away from the piano, how much force must be applied to the plank to lift the piano?

A gear and pinion have a ratio of 5:1. If the gear is rotating at a speed of 150 revolutions per minute (rpm), the speed of the pinion is most nearly

When a mass of air expands, which of the following is most likely to happen?

If gear A and gear B are meshed, and gear B rotates twice as fast as gear A, the gear ratio of A: B is

A hoist is normally used to                           .

If you were pushing a block of ice, which surface would provide the least friction?

To keep a nut tight on a bolt you could use                 .

Which action describes a clock pendulum swaying back and forth?

In a class I lever with an MA of 4, if the effort distance measures 8 feet, how long is the load distance?

When you drag a concrete block across the pavement, one way to reduce the amount of pulling force needed would be to ___________.

When you add water to a tank, water pressure on the bottom will _____________.

If a train averages 70 mph and travels for 90 minutes, how many miles does it travel?