IST Tool and Equipment Usage 2 — Questions and Answers
Question 1: When should a grinding wheel be replaced immediately?
- After every 8 hours of use
- When it shows cracks, chips, or excessive wear (Correct answer)
- When it is less than 12 inches in diameter
- After contact with any coolant or water
Correct answer: When it shows cracks, chips, or excessive wear
A cracked or chipped grinding wheel can shatter at high speed, making immediate replacement a critical safety requirement.
Question 2: What is the purpose of a tap and die set in an industrial shop?
- To measure the diameter of drill bits
- To cut or repair internal and external threads (Correct answer)
- To grind sharp edges off metal parts
- To press-fit bearings into housings
Correct answer: To cut or repair internal and external threads
Taps cut internal threads (inside holes) and dies cut external threads (on rods or bolts) for creating or repairing fastener threads.
Question 3: Which hand tool is best suited for tightening hex-head bolts in tight spaces?
- Open-end wrench
- Combination wrench
- Ratcheting box-end wrench (Correct answer)
- Pipe wrench
Correct answer: Ratcheting box-end wrench
A ratcheting box-end wrench allows tightening in tight spaces without removing and repositioning the wrench with each turn.
Question 4: What is the key difference between a reamer and a drill bit?
- A reamer cuts faster than a drill bit
- A reamer finishes and sizes an existing hole precisely; a drill bit creates new holes (Correct answer)
- A reamer is used only on wood; a drill bit is used on metal
- A reamer requires a higher RPM than a drill bit
Correct answer: A reamer finishes and sizes an existing hole precisely; a drill bit creates new holes
A reamer is used to enlarge and finish an existing hole to a precise diameter, while a drill bit is used to create new holes.
Question 5: What type of hammer should be used when driving hardened steel punches or chisels?
- Rubber mallet
- Ball-peen hammer (Correct answer)
- Claw hammer
- Dead-blow hammer
Correct answer: Ball-peen hammer
A ball-peen hammer's hardened steel face is designed for striking metal tools like punches and chisels without mushrooming.
Question 6: Why is it important to clamp a workpiece securely before drilling?
- To prevent the drill from overheating
- To keep the workpiece from spinning and causing injury (Correct answer)
- To reduce noise during the drilling operation
- To extend the life of the drill bit
Correct answer: To keep the workpiece from spinning and causing injury
An unsecured workpiece can catch on the drill bit and spin violently, causing serious injury and damaging the part.
IST Tool and Equipment Usage 2
When should a grinding wheel be replaced immediately?