Mechanical Aptitude Tool Identification and Use Questions and Answers 3

Question 1

What is the purpose of a center punch?

Accepted Answer

To create a starting dimple for drilling

Answer

A center punch creates a small indentation (dimple) in metal that guides a drill bit to start cutting at the exact desired location. Without a center punch mark, the drill bit tends to wander on smooth surfaces.

Question 2

What type of saw blade is designed to cut metal?

Accepted Answer

Hacksaw blade

Answer

A hacksaw blade is designed specifically for cutting metal. It has fine, hardened teeth (14-32 teeth per inch) set in a frame under tension. The fine tooth pitch prevents teeth from straddling the workpiece and ensures smooth metal cutting.

Question 3

What is a dial indicator used to measure?

Accepted Answer

Small linear displacements and runout

Answer

A dial indicator (or dial test indicator) measures small linear displacements with high precision, typically 0.01 mm or 0.001 inch per graduation. It is commonly used to check runout (wobble), alignment, flatness, and concentricity of rotating parts.

Question 4

What is the function of a reamer?

Accepted Answer

To enlarge and smooth a pre-drilled hole to precise size

Answer

A reamer is a precision cutting tool used to slightly enlarge a drilled hole to an exact size with a smooth, accurate finish. Drilled holes often have rough surfaces and slight size variations; reaming corrects both.

Question 5

What safety equipment should always be worn when using a bench grinder?

Accepted Answer

Safety glasses or face shield

Answer

Safety glasses or a face shield are essential when using a bench grinder because the grinding wheel throws off hot sparks, metal fragments, and abrasive particles at high speed. These can cause serious eye injuries in an instant.

Mechanical Aptitude Test Practice Test

Mechanical Aptitude Test Practice Test

Mechanical Aptitude Tool Identification and Use Questions and Answers 3