Mechanical Aptitude Test Mechanical Aptitude Tool Identification and Use 1 — Questions and Answers
Question 1: Which tool is used to cut external threads on a metal rod or bolt?
- Tap
- Die (Correct answer)
- Reamer
- Broach
Correct answer: Die
A die is the tool used to cut external threads onto a rod or bolt. A tap is its counterpart, used to cut internal threads inside a hole.
Question 2: What is the primary function of a cold chisel?
- Cutting wood along the grain
- Scribing layout lines on metal
- Cutting or shaping unhardened metal (Correct answer)
- Driving screws into masonry
Correct answer: Cutting or shaping unhardened metal
A cold chisel is a hardened steel tool used to cut, shear, or chip unhardened metal when struck with a hammer. It is called 'cold' because it cuts metal that has not been heated.
Question 3: Which measuring tool uses a calibrated screw mechanism to measure small dimensions to within 0.001 inch?
- Vernier caliper
- Micrometer (Correct answer)
- Feeler gauge
- Dial indicator
Correct answer: Micrometer
A micrometer uses a precisely machined screw thread to achieve very fine measurements, typically to 0.001 inch or better. Vernier calipers are accurate but generally less precise than a micrometer.
Question 4: A C-clamp is most commonly used in a workshop to:
- Measure the diameter of round stock
- Hold workpieces together while adhesive dries or during welding (Correct answer)
- Transfer measurements from one surface to another
- Tighten bolts in confined spaces
Correct answer: Hold workpieces together while adhesive dries or during welding
C-clamps provide strong clamping force to hold workpieces firmly together or against a surface, making them essential when gluing, welding, or machining parts that must remain stationary.
Question 5: Which type of screwdriver bit is designed to reduce cam-out by engaging more contact points on the fastener head?
- Flathead (slotted)
- Phillips
- Pozidriv (Correct answer)
- Robertson (square)
Correct answer: Pozidriv
Pozidriv has additional radial ribs between the four main arms, giving more contact points and reducing the tendency to slip out (cam-out) under high torque compared to a standard Phillips head.
Question 6: What is the correct tool to use when you need to remove a roll pin from a drilled hole in a shaft?
- Center punch and hammer
- Pin punch and hammer (Correct answer)
- Drift punch and mallet
- Scribe and pliers
Correct answer: Pin punch and hammer
A pin punch has a flat, straight tip the same diameter as the pin, allowing it to follow the pin all the way through and out of the hole without damaging the surrounding material.
Mechanical Aptitude Test Mechanical Aptitude Tool Identification and Use 1
Which tool is used to cut external threads on a metal rod or bolt?