Question 1

The lip of an oil seal faces _____ from the oil.

Accepted Answer

The lip of an oil seal faces toward the oil to ensure it effectively prevents the oil from leaking out.

Question 2

What is one of the trade names for a replacement thread insert?

Accepted Answer

The answer of What is one of the trade names...

Question 3

Refer to a bolt torque chart. What is the pro-per torque for a grade 5, 3⁄8" bolt with SAE 10 lubricant?

Accepted Answer

The answer of Refer to a bolt torque chart. What...

Question 4

Refer to a tap drill size chart. What is the correct tap drill for a 1⁄4 x 20 screw thread?

Accepted Answer

The answer of Refer to a tap drill size chart....

Question 5

Technician A says that the 20 in 1⁄4 x 20 signifies the total number of threads the fastener has. Technician B says that the 1⁄4 signifies the socket size of the fastener head. Who is right?

Accepted Answer

The "20" in 1/4 x 20 refers to the thread count per inch, not the total number of threads the fastener has. The "1/4" signifies the diameter of the bolt, not the socket size of the fastener head.

Question 6

Technician A says that a nonhardened nut loses clamping ability each time it is retorqued. Technician B says that a high-grade capscrew loses clamping ability each time it is retorqued to specification. Who is right?

Accepted Answer

Technician A is correct. Nonhardened nuts can lose their clamping ability each time they are retorqued due to stretching and deformation of the threads. On the other hand, Technician B is incorrect. High-grade capscrews, especially those made of alloy steel, can be retorqued several times without losing clamping ability if done to the proper specifications.

Question 7

Name one place where pipe threads are found in an engine.

Accepted Answer

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Question 8

Why is a tap turned backward after turning forward when cutting a thread?

Accepted Answer

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Question 9

Technician A says that a hole can be drilled in cast iron using no lubricant. Technician B says that a hole can be drilled in aluminum without the use of a lubricant. Who is right?

Accepted Answer

Both technician A and B are correct. Cast iron does not require a lubricant to be drilled and aluminum can be drilled without the use of a lubricant as well. However, it is generally recommended to use a lubricant when drilling any material to prolong the life of the drill bit and achieve better results.

Question 10

Technician A says that using a thread lubricant results in more bolt stretch. Technician B says that a grade 8 bolt has eight radial lines on its head. Who is right?

Accepted Answer

The answer of Technician A says that using a thread...

Question 11

To what percent of its elastic limit is a bolt usually torqued?

Accepted Answer

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Question 12

Technician A says that drill sizes are classified by letters. Technician B says that drill sizes are classified by numbers. Who is right?

Accepted Answer

Drill sizes are indeed classified by both letters and numbers, in addition to fractional sizes, to cover a wide range of diameters.

Question 13

Name four types of taps.

Accepted Answer

The answer of Name four types of taps.
...

Question 14

If a nut turns easily for a few threads on a bolt and then begins to turn hard, what could be the problem?

Accepted Answer

The answer of If a nut turns easily for a...

Question 15

What color is the locking sealer used to glue parts that will not be disassembled again?

Accepted Answer

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Question 16

What is the name of the machine shop process that erodes a broken fastener without damaging the screw thread?

Accepted Answer

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Question 17

What does RTV stand for?

Accepted Answer

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Question 18

When installing half of a rear main lip seal in a block, the parting line is positioned _____ with the parting line of the main cap.

Accepted Answer

The parting line of the half seal should be offset with the parting line of the main cap to avoid leakage.

Question 19

Silicone sealant that does not use acetic acid to cure and is used with oxygen sensor systems is called low _____ RTV.

Accepted Answer

The answer of Silicone sealant that does not use acetic...

Question 20

Before putting a click-type torque wrench aside after using it, what should be done?

Accepted Answer

The answer of Before putting a click-type torque wrench aside...

Quiz 15: Engine Hardware: Fasteners, Thread Repair, and Gaskets