Last Year Midterm (Concept) Flashcards
The safe twisting moment for a compound shaft is equal to the ___________.
minimum calculated value
it equal and opposite forces applied to a body tend to elongate it, the stress so produces is called:
tensile stress
The torsional rigidity of a shaft is expressed by the
Torque required to produce a twist of one radian per unit length of shaft
The property of a material by virtue of which a body returns to its original shape after remove of the load is called:
Elasticity
The ratio of the ultimate strength to the allowable stress of the material is called:
Factor of Safety
If the radius of wire stretched by a load is doubled, then its young’s modulus will be:
remain unaffected
The total elongation produced in a bar of uniform section hanging vertically downwards due to its own weight is equal to that produced by a weight
half of the weight of bar applied at lower end.
The actual stress that the material has when under load is called:
Working stress
if a material expands freely due to heating it will develop
no stress
The force acting along the circumference will cause stress in the walls in a direction normal to the longitudinal axis of cylinder, this stress is called:
hoop stress
Shearing stress is also known as:
Tangential stress
Shear stress induced in a shaft subjected to tension will be
none of the above
A shearing stress acting on a body changes its:
shape
A cylindrical tank is considered to be thin -walled if its diameter is more than ___ times the wall thickness
10
Stress caused by forced acting along or parallel to the area resisting the forces is known as:
Shearing stress