Q. The coefficient of friction between the belt and pulley depends upon the

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Q. The allowable static stress for steel gears is approximately __________ of the ultimate tensile stress.

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Q. The pitch diameter is the __________ diameter of an external or internal screw thread.

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Q. When a hole of diameter 'd' is punched in a metal of thickness 't', then the force required to punch a hole is equal to (where τu = Ultimate shear strength of the material of the plate)

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Q. The springs mostly used in machinery have spring index less than 3.

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Q. According to I.B.R., the distance between the rows of rivets, for equal number of rivets in more than one row for lap joint or butt joint (chain riveting) shall not be less than

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Q. The interference may only be avoided if the addendum circles of the two mating gears cut the common tangent to the base circles between the points of tangency.

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Q. The spigot and socket joint is mostly used for pipes which are burried in the earth.

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Q. The permissible stress in the fillet weld is 100 N/mm². The fillet weld has equal leg lengths of 15 mm each. The allowable shearing load on the weldment per cm length of the weld is

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Q. The stress which vary from a minimum value to a maximum value of the same nature (i.e. tensile or compressive) is called

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Q. When the material of key and shaft is same, and the width of key is one-fourth of the diameter of shaft (d), then length of key will be

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Q. The pressure angle for involute gears depends upon the size of teeth.

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Q. When a belt drive is transmitting maximum power,

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Q. Gears are casted by

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Q. A screw is said to be a self locking screw, if its efficiency is

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Q. An aluminium member is designed on the basis of

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Q. A plate with a circular hole in the centre is subjected to a pull of P. The maximum stress induced at the edge of the hole is three times of the nominal stress.

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Q. The cold working of metals is carried out __________ the recrystallisation temperature.

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Q. The groove angle of the pulley for rope drive is usually

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Q. When percentage of carbon in steel is increased, the ductility of steel decreases.

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