mie unit 3

What tool tightens bolts?

• screwdriver

• torque wrench

Answer explanation

A torque wrench is specifically designed to tighten bolts to a precise torque specification, ensuring proper tension. A screwdriver, on the other hand, is used for screws, not bolts.

What is a three-sided polygon?

• square

• triangle

Answer explanation

A triangle is defined as a three-sided polygon. Therefore, the correct answer to the question about the shape of a triangle is 'triangle', not 'square'.

What do you use to lift heavy things?

• lever

• vice

Answer explanation

A lever is a simple machine that helps lift heavy objects by using a fulcrum to amplify force. A vice, on the other hand, is used to hold objects in place, not to lift them. Therefore, the correct answer is lever.

What simple machine helps move things up?

• pulley

• drill

Answer explanation

A pulley is a simple machine that uses a wheel and a rope to lift objects. It changes the direction of the force applied, making it easier to move things up. A drill, on the other hand, is not designed for lifting.

What cuts paper?

• scissors

• screwdriver

Answer explanation

Scissors are specifically designed to cut paper and other materials with their sharp blades. A screwdriver, on the other hand, is used for turning screws and is not suitable for cutting paper.

What holds things tightly?

• ramp

• vice

Answer explanation

A vice is a tool specifically designed to hold objects tightly in place, making it ideal for tasks like woodworking or metalworking. A ramp, on the other hand, is used for movement, not for holding things.

What machine can lift heavy loads?

• wedge

• elevator

Answer explanation

An elevator is specifically designed to lift heavy loads vertically, making it the correct choice. A wedge, while useful for lifting in some contexts, is not primarily a machine for lifting heavy loads.

What do you call a tool that makes holes?

• spanner

• drill

Answer explanation

A tool that makes holes is called a drill. A spanner, on the other hand, is used for gripping and turning nuts and bolts, not for creating holes.

What tool turns screws?

• screwdriver

• wrench

Answer explanation

A screwdriver is specifically designed to turn screws, allowing for easy insertion and removal. A wrench, on the other hand, is used for gripping and turning nuts and bolts, not screws.

What machine uses a wheel and axle?

• lever

• crane

Answer explanation

A crane uses a wheel and axle system to lift heavy loads, making it an example of a machine that incorporates this simple machine. A lever, on the other hand, does not utilize a wheel and axle.