Question

multiple choice: 1 point
which of the following statements is true of threaded inserts like a helicoil?
they are threaded inside and outside.
they look like small, stainless - steel springs.
they screw on top of a nut to prevent nut loosening.
they are used to hold together shafts and linkages.

8 multiple choice: 1 point
which step should always be taken before using a broken bolt extractor
using a ball peen hammer to break up the fastener
drilling out the fastener with a left - hand drill bit.
drilling out the fastener with a right - hand drill bit.
spraying the bolt with penetrating oil

9 multiple choice: 1 point
which type of non - threaded fastener is frequently used to secure shafts and linkages
pins
rivets
bolts
christmas tree clips.

10 multiple choice: 1 point
which tool is used to cut threads on a non - threaded rod?
thread chaser
threaded inserts
files
taps

Explanation:

• For question 7: Helicoil inserts are small, stainless - steel spring - like devices. They have internal and external threads, but the most common description is their spring - like appearance.
• For question 8: Spraying a broken bolt with penetrating oil is a standard first step to loosen it before using a bolt extractor.
• For question 9: Pins are non - threaded fasteners often used to secure shafts and linkages.
• For question 10: Dies are used to cut threads on a non - threaded rod.

Answer:

1. B. They look like small, stainless - steel springs.
2. D. Spraying the bolt with penetrating oil.
3. A. pins
4. C. dies