FUN 101 Week 3 Review Hardware

Consider a bolt that is distorted and necked. Which of the bolt's following strength properties has been exceeded by the damaging force?

• Its yield strength

• Its tensile strength

• Its prevailing torque

• Its shear strength

Consider a bolt with a tensile strength of 120,000 psi. Which of the following situations will most likely cause a fatigue failure resulting in a fractured bolt?

• A preload force of 3000 psi

• A preload force of 30,000 psi

• A preload force of 75,000 psi

• A preload force of 90,000 psi

Technician A says tools are identified as metric or imperial by markings identifying their sizes, or by the increments on measuring instruments. Technician B says a micrometer should always be stored with its measuring surfaces touching in order to maintain its calibration. Who is correct?

• Technician A

• Technician B

• Both Technician A and Technician B

• Neither Technician A nor Technician B

Which of the following combinations of fasteners contains a bolt?

• An externally threaded fastener with a nut on one end and the other end threaded into an iron casting

• An externally threaded fastener that threads into a hole on a transmission

• An externally threaded fastener clamping a frame crossmember using a nut

• An externally threaded fastener that forms its own threads when inserted into a hole

Which of the following combinations of threads are strongest and most resistant to stripping?

• Rolled coarse threads

• Machine-cut fine threads

• Machine-cut coarse threads

• Rolled fine threads

Which of the following fasteners will support the most load?

• 3/8" UNC SAE Grade 2

• M10 X 1.5 Class 10.9

• M8 x 1.5 Class 8.8

• 7/16" UNF SAE Grade 5

Which of the following forces acting on a fastener is greatest when it is correctly preloaded?

• Tensile load

• Shear load

• Proof load

• Elastic load

Which of the following methods is used by threads to multiply rotational force into clamping force?

• Threads act as wedges to produce a mechanical advantage

• Threads act as a lever to produce a mechanical advantage

• The employer, the supervisors, and the workers

• Threads use an incline plane to produce a mechanical advantage

Which of the following tightening methods produces the most accurate preload force on a threaded fastener?

• Using a torque stick

• Using an accurately calibrated torque wrench

• Technician judgement

• My Cousin Vinny

Which of the following types of heads will a cap screw use if there is adequate access and space for a wrench or socket?

• Internal hex head

• External Torx head

• A twelve-point head

• Hex head