installation and removal of fasteners

Question 1

What is elastic Limit

Answer 1

Elastic Limit is the maximum tension that an object can sustain and still return to its original shape and be fully functional

Question 2

What is proof load

Answer 2

The proof load is the highest recommended tensile load for that fastener

Question 3

What is yield point

Answer 3

Yield point is the point at which a fastener suffers permanent deformation (set) when a tensile load is applied

Question 4

Tensile strength

Answer 4

The maximum tensile stress or load a fastener can support before fracture occurs

Question 5

Shear strength

Answer 5

The amount of continuous shear force (not cyclic or fluctuating) that a fastener can withstand before breaking

Question 6

What is pre load

Answer 6

A pre load on a fastener means tightening it with its elastic limit before hand in order to prepare it to accept the load

Question 7

What is toughness

Answer 7

The resistance to fracture or the amount of energy a substance absorbs before it breaks

Question 8

What is Hardness

Answer 8

Hardness is the ability of a material to resist penetration

Question 9

what is malleability

Answer 9

malleability is when a material can be shaped or molded easily

Question 10

what is Ductillity

Answer 10

Ductility is a measure of how much a material can be deformed or drawn before it breaks.

Question 11

What is Compressive Stress

Answer 11

Compression is the force acting on all materials between the bolt head and the nut to
compress or shorten them

Question 12

What is torque

Answer 12

Torque is the turning force set by the wrench on a fastener

Question 13

what is elasticity

Answer 13

if a material has the ability to be stretched without deformation

Question 14

What does Dilation mean?

Answer 14

Dilation means that the nut is stretched to a larger diameter, shifting the tensile load onto the tips of the threads

Question 15

How can you overcome Nut Dilation

Answer 15

Nut dilation can be overcome by increasing the wall thickness of the nut

Question 16

How is bolt tension produced?

Answer 16

By a nut rotating and advancing on the bolt threads

Question 17

True or False: Coarse threaded bolts have greater strength but lower thread shear strength

Answer 17

False Coarse Threaded bolts have LOWER strength but GREATER shear strength

Question 18

what are two things to know when using adapters

Answer 18

1: The adapter must be solid
2: the amount that you increase the distance between the wrench handle and the socket must be accounted for by decreasing your torque requirement

Question 19

what are the parts of a hydraulic jacking tool

Answer 19

the Puller, Ram, Socket, Tommy bar

Question 21

What is required in a stud to heat it?

Answer 21

A hole bored down the center of the stud

Question 22

What is the most popular heating tool used today?

Answer 22

Induction Heaters as they are the quickest and most accurate

Question 23

how is residual Preload determined?

Answer 23

Residual preload is determined by measuring the stud length before and after tensioning and again during months of operation.

Question 24

what is the tolerance for a surface finish?

Answer 24

63-80 microinches

Question 25

Apply Lubricant to the threads of a fastener does what?

Answer 25

Increases the clamp load compared to dry threads