Fastening Devices

Question 1

A complete torquing procedure, for a component such as a cylinder head, should be done in:

a) one step
b) two steps
c) three steps
d) the sequence and number of steps specified by the manufacturer

Answer 1

d) the sequence and number of steps specified by the manufacturer

Question 2

In the automotive trade, the term cap screw is generally interchangable with:

a) machine screw
b) bolt
c) stud
d) nut

Answer 2

b) bolt

Question 3

Internal snap rings are used to:

a) locate gears or collars on shafts
b) retain components inside casting bores
c) snap components on the inside of a machine
d) lock internal threads

Answer 3

b) retain components inside casting bores

Question 4

Dowel pins are used for:

a) locking castle nuts in place
b) positioning hubs or gears and shafts
c) shear pins between gears and shafts
d) aligning components during assembly

Answer 4

d) aligning components during assembly

Question 5

An external tooth lock washer:

a) is used only with 82 degree flat head screws
b) provides less friction than an internal lock washer of the same size
c) provides more friction than an interman lock washer of the same size
d) provides the same friction as an internal tooth lock washer of the same size

Answer 5

c) provides more friction than an internal lock washer of the same size

Question 6

Marks on the head of a bolt indicate the:

a) number of turns before the bolt is tight
b) pitch of the thread
c) class of fit
d) grade and property class

Answer 6

d) grade and property class

Question 7

In figure 45, the dimension marked A is known as:

a) pitch
b) minor diameter
c) crest
d) root

Answer 7

a) pitch

Question 8

The ISO Metric thread form is essentially the same as the:

a) unified national thread form
b) international metric thread form
c) API thread form
d) Acme thread form

Answer 8

a) unified national thread form

Question 9

Tensil grades for nuts:

a) are not available
b) are all the same
c) should match the bolt grade
d) are greater than for the bolts

Answer 9

c) should match the bolt grade

Question 10

A bolt that has been installed with thread locker seems difficult to remove. The proper procedure is to:

a) break it off an drill it off
b) heat the bolt with a heat gun
c) cut it out with a cutting torch
d) cut the head off with a chisel

Answer 10

b) heat the bolt with a heat gun

Question 11

Applying lubricant to a threaded fastener:

a) increases the tourque necessary to tighten the fastener
b) decreases the clamp load applied for the same torque value
c) increases the clamp load applied for the same torque value
d) makes no difference to the torque requirement

Answer 11

c) increases the clamp load applied for the same torque value

Question 12

Torque to angle means:

a) tighten to a minimum torque; then tighten to a specific angle
b) tighten to a maximum torque; then loosen to a specific angle
c) always turn the fastener 90 degrees past specification
d) turn the fastener 90 degrees less than specification

Answer 12

a) tighten to a minimum torque; then tighten to a specific angle

Question 13

A fastener with three (3) radial marks on the head is an:

a) imperial grade 3
b) ISO grade 3
c) imperial grade 5
d) ISO grade 5

Answer 13

c) imperial grade 5

Question 14

Anaerobic sealers cure when:

a) the temperature exceeds 160 degrees Celcius
b) there is no oxygen present
c) exposed to air at room temperature
d) used to seal between two dissimilar metals

Answer 14

b) there is no oxygen present

Question 15

A master spline is used to:

a) lock a component to the shaft
b) guide the tool that cuts the spline in the shaft
c) allow a component to slide along the spline
d) index a component mounted on the shaft

Answer 15

d) index a component mounted on the shaft

Question 16

Plastic trim fasteners are used to:

a) attach both interior and exterior parts
b) attach interior trim panels only
c) attach experior trim pieces only
d) attach plastic engine components

Answer 16

a) attach both interior and exterior parts