ASVAB Question of the Week: July 19, 2017

Here is our ASVAB practice question for this week. Check the comments below for the answer:

ASVAB practice question

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Answer!

The screwdriver is a type of wheel and axle simple machine.

The wheel and axle machine consists of a smaller diameter rod (the axle) and a larger cylinder (the wheel). Any force applied to the wheel is magnified because of the wheel's larger relative diameter. The bigger the difference between axle and wheel diameter, the larger the mechanical advantage.

For a screwdriver, the handle is the wheel and the thinner shaft which contains the slotted driver is the axle. The wider diameter handle allows you to exert more force on the smaller screws, making tightening and loosening much easier.

The answer is D) wheel and axle.