MACHINE DESIGN QUIZ

Which of the following screw thread is adopted for power transmission in either direction?

Multiple threads

Square threads

Buttress threads

Acme threads

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The maximum normal stress theory is used for

Brittle materials

Non-ferrous materials

Plastic materials

Ductile materials

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In designing thick cylinders, the equation used is

Lame's equation

All of these

Clavarinos' equation

Birnie's equation

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A long helical spring having a spring stiffness of 12 kN/m and number of turns 20, breaks into two parts with number of turns 10 each in both the parts. If the two parts are connected in series, then the softness of the resultant spring will be

6 kN/m

30 kN/m

24 kN/m

12 kN/m

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For same pulley diameters, center distance, belt speed and belt and pulley materials,

Open belt drive transmits more power than crossed belt drive

Power transmission does not depend upon open and crossed types of constructions

Open and crossed belt drives transmit same power

Crossed belt drive transmits more power than open belt drive

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The buckling load will be maximum for a column, if

Both ends of the column are clamped

One end of the column is hinged and the other end is free

Both ends of the column are hinged

One end of the column is clamped and the other end is free

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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

Completely reversed loading

Static loading

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Which of the following coupling is used to connect two shafts which have both lateral and angular misalignment?

Bushed pin type coupling

Oldham coupling

All of these

Universal coupling

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In hydrostatic bearings

The oil film is maintained by supplying oil under pressure

The Oil film pressure is generated only by the rotation of the journal

Grease is used for lubrication

Do not require external supply of lubricant

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In order to have a connecting rod equally strong in buckling about X-axis and Y-axis, the moment of inertia about X-axis should be __________ the moment of inertia about Y-axis.

Equal to

Three times

Twice

Four times

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