Question

multiple choice 1 point
the grade of a fastener, such as a bolt, is a measure of its

• tensile strength
• color
• hardness
• finish

multiple choice 1 point
which type of tool is used to cut threads in a drilled hole?

• die
• thread chaser
• thread cutter
• tap

multiple choice 1 point
technician a states that a tap wrench should be lubricated when used to cut new threads. technician b states the tap wrench should be turned one full turn then turned back one half turn when used to cut new threads. who is correct?

• technician a only
• technician b only
• both technician a and b
• neither technician a or b

Explanation:

1. The grade of a fastener like a bolt measures its tensile strength, which indicates how much pulling - force it can withstand before breaking.
2. A tap is used to cut internal threads in a drilled hole. Dies are for external threads, thread chasers are for cleaning existing threads, and thread cutters can be more general - purpose but tap is the specific tool for this job.
3. When using a tap wrench to cut new threads, it should be lubricated to reduce friction and wear, and it should be turned one full turn then turned back one - half turn to break the chips. So both Technician A and B are correct.

Answer:

1. tensile strength
2. tap
3. Both technician A and B.