Q. The process which improves the machinability of steels, but lowers the hardness and tensile strength is

View solution

Q. Which of the following statement is wrong ?

View solution

Q. The relation between the pitch of the chain (p) and pitch circle diameter of the sprocket (D) is given by (where T = Number of teeth on the sprocket)

View solution

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

View solution

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

View solution

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

View solution

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)

View solution

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

View solution

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

View solution

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.

View solution

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

View solution

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

View solution

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

View solution

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

View solution

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

View solution

Q. When a belt drive is transmitting maximum power,

View solution

Q. Gears are casted by

View solution

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

View solution

Q. An aluminium member is designed on the basis of

View solution

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.

View solution