MACHINE DESIGN QUIZ

The constant factor in case of R10 series of preferred numbers is

1.06

1.12

1.58

1.26

TRUE ANSWER : ?
YOUR ANSWER : ?

The power transmitted by the belt drive can be increased by

All of these

Dressing the belt to increase the coefficient of friction

Increasing the initial tension in the belt

Increasing wrap angle by using idler pulley

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YOUR ANSWER : ?

Surface endurance limit of gear material is dependent upon its

Brinell hardness number

Yield strength

Elastic strength

Toughness

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In a boundary lubricated bearing, there is a __________ of lubricant between the journal and the bearing.

None of these

Thin film

Either A or B

Thick film

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The following type of nut is used with alien bolt

Hexagonal nut

Slotted nut

Castle nut

Any one of the above

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YOUR ANSWER : ?

Endurance limit or fatigue limit is the maximum stress that a member can withstand for an infinite number of load applications without failure when subjected to

Combined static and dynamic loading

Dynamic loading

Static loading

Completely reversed loading

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If T₁ and T₂ are the tensions on the tight and slack sides of the belt respectively, and Tc is the centrifugal tension, then initial tension in the belt is equal to

(T₁ + T₂ + Tc)/2

(T₁ - T₂ + Tc)/2

T₁ + T₂ + Tc

T₁ - T₂ + Tc

TRUE ANSWER : ?
YOUR ANSWER : ?

The connecting rod bolts are tightened up so that tightening stress

Is about yield point divided by safety factor

Is 50% of yield point

Approaches yield point

Is just sufficient to hold parts together

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Gear box is used

To increase efficiency of system

To obtain variable speeds

For speed reduction

To produce torque

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A tapered key which fits in a key way in the hub and is flat on the shaft, is known as

Feather key

Wood ruff key

Gib-head key

Flat saddle key

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YOUR ANSWER : ?

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