Last Year Midterm (Concept) Flashcards

1
Q

The safe twisting moment for a compound shaft is equal to the ___________.

A

minimum calculated value

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2
Q

it equal and opposite forces applied to a body tend to elongate it, the stress so produces is called:

A

tensile stress

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3
Q

The torsional rigidity of a shaft is expressed by the

A

Torque required to produce a twist of one radian per unit length of shaft

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4
Q

The property of a material by virtue of which a body returns to its original shape after remove of the load is called:

A

Elasticity

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5
Q

The ratio of the ultimate strength to the allowable stress of the material is called:

A

Factor of Safety

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6
Q

If the radius of wire stretched by a load is doubled, then its young’s modulus will be:

A

remain unaffected

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7
Q

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

A

half of the weight of bar applied at lower end.

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8
Q

The actual stress that the material has when under load is called:

A

Working stress

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9
Q

if a material expands freely due to heating it will develop

A

no stress

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10
Q

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:

A

hoop stress

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11
Q

Shearing stress is also known as:

A

Tangential stress

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12
Q

Shear stress induced in a shaft subjected to tension will be

A

none of the above

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13
Q

A shearing stress acting on a body changes its:

A

shape

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14
Q

A cylindrical tank is considered to be thin -walled if its diameter is more than ___ times the wall thickness

A

10

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15
Q

Stress caused by forced acting along or parallel to the area resisting the forces is known as:

A

Shearing stress

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