Fasteners

Question 1

What are five ways of removing a seized nut?

Answer 1

Penetrating oil, Use heat, Nut splitting, Use a hammer an chisel, Use a hack saw to cut threads.

Question 2

Thread restoring inserts can provide stronger threads in soft or weak materials?

Answer 2

True

Question 3

A threaded coil insert is large in diameter than its prepared hole?

Answer 3

True

Question 4

A bolt with a cross sectional area of 2 square inches and weight of 14 000 lbs hanging from it is under tension of?

Answer 4

7000 psi

Question 5

How do you prevent wall dilation from occurring in a nut?

Answer 5

Increase wall thickness

Question 6

a lubricated fastener achieves the same pre load as a dry fastener when torqued to the same setting?

Answer 6

False

Question 7

What problems are caused by undertorquing and overtorquing?

Answer 7

Bolts may snap or come off, Bolts may become loose an allow parts to vibrate, sub components me be crushed, all of the above

Question 8

You are using a 24 inch torque wrench with a 6 inch adapter, the adapter extended straight out, recommended torque is 355 ft-lb, with out the extension you would set the wrench for 355 ft lb, what is your setting now?

Answer 8

24/30=.8x355=284 ft lb

Question 9

How is a bolt tensioned in a hydraulic nut tensioning set up?

Answer 9

Axial force

Question 10

What are the advantages of using multi-jackbolt fasteners over other tensioning?

Answer 10

Tension without gulling, higher tension rate.

Question 11

When exposed to air, anaerobic sealers cure to a firm but flexible silicone like material.

Answer 11

False

Question 12

The primary function of an adhesive is to?

Answer 12

Hold parts together.

Question 13

Dowel pins are?

Answer 13

Hardened and ground steel.

Question 14

The primary purpose of sealant is?

Answer 14

To exclude dust, dirt, and moisture.

Question 15

What do marks on the end of the bolt indicate?

Answer 15

Grade and tensile strength.

Question 16

The pitch diameter of a thread is measured exactly halfway between the major and minor diameters.

Answer 16

False

Question 17

A thread is designated as 5/8 - 11 UNC - 2B, is this external or internal thread?

Answer 17

Internal.

Question 18

What is the taper per foot of an NPT thread?

Answer 18

3/4 inch taper per foot.

Question 19

What are the names of each part of a thread?

Answer 19

Thread angle, crest, root, pitch, single depth of thread.

Question 20

The designation that identifies a nut is?

Answer 20

5/16-18 UNC - 1B the B is internal thread

Question 21

Marks on the head bolt indicate the?

Answer 21

Grade and tensile strength.

Question 22

A thread is designated 5/8-11 Class 2 A.

Answer 22

Is an external thread.

Question 23

Which type of torque wrench is best for achieving a pre set amount of torque?

Answer 23

Click type