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

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

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

Standard inch bolts have lines on the heads to identify the grade.

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

Used only on precision machine parts, a(n) ____ sealer hardens in the absence of air.

Name four types of taps.

Technician A says that nonretorque head gaskets do not compress so they maintain all of the original clamping force. Technician B says that a microinch is one millionth of an inch. Who is right?

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?

Technician A says that blue anaerobic thread locking compound is used when parts might be disassembled again. Technician B says that using some types of RTV for engine sealing can damage an oxygen sensor. Who is right?

What does RTV stand for?

Technician A says some manufacturers recommend head bolts going into a coolant passage be sealed with liquid thread sealant. Technician B says RTV stands for right torque value. Who is correct?

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

The maximum stress a material can withstand and still be able to return to its original form without damage is known as ____.

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

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?

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

Technician A says that sealers are used with all gaskets but paper ones. Technician B says that a broken exhaust manifold bolt can result in a burned exhaust valve. Who is right?

To anneal a metal, it is heated and cooled rapidly.

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.

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