MACHINE DESIGN QUIZ

Wire ropes as compared to cotton ropes

Offer silent operation

All of these

Are lighter in weight

Can withstand shock loads

TRUE ANSWER : ?
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According to Rankine's theory, the failure occurs at a point in a member

When the maximum principal strain in a biaxial stress system reaches the strain at the elastic limit as determined from a simple tension test

When the maximum principal stress in a biaxial stress system reaches the elastic limit of the material in a simple tension test

When the strain energy per unit volume in a biaxial stress system reaches the strain energy at the elastic limit per unit volume as determined from a simple tension test

When the maximum shear stress in a biaxial stress system reaches the shear stress at elastic limit in a simple tension test

TRUE ANSWER : ?
YOUR ANSWER : ?

A type of brake commonly used in motor cars is a

Shoe brake

Band and block brake

Band brake

Internal expanding brake

TRUE ANSWER : ?
YOUR ANSWER : ?

Two shafts of the same length and material are joined in series. If the ratio of their diameters is 2, then the ratio of their angles of twist will be

4

16

8

2

TRUE ANSWER : ?
YOUR ANSWER : ?

The objective of idler pulley in belt drive is to

All the above objectives

Increase the power transmission capacity

Decrease the tendency of belt to slip

Increase the wrap angle and belt tension

TRUE ANSWER : ?
YOUR ANSWER : ?

If b denotes the face width and L denotes the cone distance for a bevel gear, then the bevel factor is written as

b/L

1 - (b/L)

1 - 2 b.L

b/2L

TRUE ANSWER : ?
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When the belt is transmitting maximum power, the belt speed should be(Where, m = mass of belt per meter (kg/m) and Pmax = maximum permissible tension in belt (N))

√(Pmax / 3m)

√(3m /Pmax)

√(Pmax / 2m)

√(Pmax / m)

TRUE ANSWER : ?
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

Completely reversed loading

Combined static and dynamic loading

Dynamic loading

Static loading

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The cam follower extensively used in aircraft engines is

Roller follower

Spherical faced follower

Flat faced follower

Knife edge follower

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According to I.B.R., when the thickness of the boiler shell (t) is less than 8 mm, then the diameter of the rivet hole (d) is obtained by

Equating tearing resistance of the plate to the shearing resistance of the rivets

Equating tearing resistance of the plate to the crushing resistance of the rivets

Equating shearing resistance to the crushing resistance of the rivets

None of these

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