Torque Theory Flashcards
The formula for Torque is: Torque = Length x Force
A) True
B) False
True - T = L x F
Torque is expressed in length and weight units.
A) True
B) False
A) True
How much force must be applied to a two-foot-long torque wrench to achieve 250 foot-pounds of torque?
125 lbs.
Which of the following are part of the phases of the fastening process? Choose all that apply.
I) Elastic phase
II) Friction phase
III) Plastic phase
IV) Rundown phase
Elastic, plastic, and rundown are all fastening phases.
To prevent an over-torque condition, the operator has to stop between which of the phases listed?
I) Elastic and alignment phases
II) Elastic and plastic phases
III) Plastic and rundown phases
IV) Rundown and alignment phases
Elastic and plastic phases
A successful and proper torque application may be described as an application of enough ___ to a fastener so it will have enough “spring action” to hold the joint together, without stretching it too much so that the bolt will ___ and no longer spring back.
A. force / yield
B. power / yield
C. strength / be very tight
D. torque / freeze
A. force / yield
Which phase of the fastening process involves the elongation of the fastener but will return to its original length upon loosening?
A. Alignment Phase
B. Elastic Phase
C. Plastic or Yield Phase
D. Run Down Phase
B. Elastic Phase
Torque is only defined by the force applied and does not depend on the distance from the point of rotation.
A) True
B) False
B) False
Torque is equal to ___.
A. distance divided by weight
B. force divided by length
C. force multiplied by distance
D. force multiplied by weight
C. force multiplied by distance
Torque is expressed in both length and weight units.
A) True
B) False
A) True
The alignment phase of the fastening process involves drawing the fastener into alignment with the joint mating surfaces.
A) True
B) False
A) True
Match the descriptions with the phases of the fastening process.
I) Fastener and joint mating surfaces are drawn into alignment
II) Free running fastener
III) Permanent deformation and elongation of the fastener and/or joint, necking of the fastener occurs
IV) The fastener is elongated but will return to original length upon loosening
___
A) Rundown phase
B) Plastic/Yield phase
C) Elastic phase
D) Alignment phase
I - D
II - A
III - B
IV - C
Proper torque application ensures that fasteners are protected from failure.
A) True
B) False
A) True
Using the formula for torque, how much force must be applied to a 108-inch-long torque wrench to achieve 1,500 foot-pounds of torque?
166.66 (167) lbs
Why is torque important?
A. Proper torque ensures correct clamping force.
B. Proper torque maintains joint and fastener reliability and product safety.
C. Proper torque protects the fastener from failure.
D. All of the above.
D. All of the above.
