MACHINE DESIGN QUIZ

Factor of safety for fatigue loading is the ratio of

Young's modulus to the ultimate tensile strength

Endurance limit to the working stress

Elastic limit to the yield point

Elastic limit to the working stress

TRUE ANSWER : ?
YOUR ANSWER : ?

The sleeve or muff coupling is designed as a

Thick cylinder

Hollow shaft

Solid shaft

Dun cylinder

TRUE ANSWER : ?
YOUR ANSWER : ?

The power transmitted by belt drive depends upon

All of these

Arc of contact

Initial belt tension

Belt velocity

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YOUR ANSWER : ?

The pitch of threads on a Jock nut in comparison to pitch of nut is

Finer

Coarser

Same

Very fine

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YOUR ANSWER : ?

In the assembly of pulley, key and shaft

All the three are designed for equal strength

Key is made the weakest

Pulley is made the weakest

Key is made the strongest

TRUE ANSWER : ?
YOUR ANSWER : ?

A flanged pipe joint will be a leak-proof joint, if the circumferential pitch of the bolts is (where d = Diameter of bolt hole)

Greater than 30d

Equal to inside diameter of pipe

Less than 20d

Between 20d and 30d

TRUE ANSWER : ?
YOUR ANSWER : ?

According to maximum normal stress theory, the maximum normal stress in the shaft is

√(σ² × 4τ²)

(1/2) × √(σ² × 4τ²)

(1/2) × [σ + √(σ² × 4τ²)]

σ + √(σ² × 4τ²)

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YOUR ANSWER : ?

The acme threads are usually found on

Railway carriage couplings

Feed mechanism of machine tools

Screw cutting lathes

Spindles of bench vices

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Rankine's theory is used for

Brittle materials

Ductile materials

Plastic materials

Elastic materials

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Which one of the following is a positive drive?

Crossed flat belt drive

Rope drive

V-belt drive

Chain drive

TRUE ANSWER : ?
YOUR ANSWER : ?

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