Test: Machine Design - 3 - Mechanical Engineering MCQ

In a gear, having involute teeth, the normal to the involute is a tangent to the

Which of the following statement is correct ?

The metal suitable for bearings subjected to light loads is

A connecting rod subjected to an axial load may buckle in the plane perpendicular to the plane of motion of the connecting rod.

Which of the following is an antifriction bearing?

A connecting rod is four times strong in buckling about Y-axis than about X-axis.

In designing a sleeve coupling, length of the sleeve is taken as (where d = Diameter of the shaft)

When a shaft is subjected to combined twisting moment (T) and bending moment (M), then the equivalent twisting moment is equal to

In helical gears, the right hand helixes on one gear will mesh __________ helixes on the other gear.

A connecting rod is designed as a

The cross-section of the arm of a bell crank lever is

The rocker arms in internal combustion engines are of first type levers.

In a crossed belt drive, the shafts are arranged parallel and rotate in the same directions.

In worm gears, the angle between the tangent to the pitch helix and an element of the cylinder, is known as

Idler pulley is used for

The bell crank levers used in railway signalling arrangement are of third type levers.

When spring index increases, the value of Wahl's stress factor

A shaft is subjected to a maximum bending stress of 80 N/mm² and maximum shearing stress equal to 30 N/mm² at a particular section. If the yield point in tension of the material is 280 N/mm² and the maximum shear stress theory of failure is used, then the factor of safety obtained will be

The longitudinal stress is __________ of the circumferential stress.

The expression 0.175 - 0.841/T is the Lewis form factor for

A screw will be self locking, if

The maximum shear stress theory is used for