90° - φ

45° - φ

45° - φ/2

45° + φ/2

**When an open coiled helical compression spring is subjected to an axial compressive load, the stress…****Whether any core is required in wire ropes****The minimum number of teeth on the pinion which will mesh with any gear without interference for 20°…****In replacing the V-belts, a complete set of new belts is used instead of replacing a single damaged…****A sliding bearing in which although lubricant is present, the working surfaces __________ contact each…****The stress which vary from a minimum value to a maximum value of the same nature (i.e. tensile or compressive)…****The number of slots in a 25 mm castle nut is****The draw of cotter need not exceed****For maximum power, the velocity of the belt will be****If the tearing efficiency of a riveted joint is 75%, then the ratio of diameter of rivet to the pitch…****The shock resistance of steel is increased by adding****The velocity of sliding ________ the distance of the point of contact from the pitch point.****Two shafts A and B under pure torsion are of identical length and identical weight and are made of the…****Which of the following material has the maximum ductility?****If a material fails below its yield point, failure would be due to****In radial bearings, the load acts __________ to the axis of rotation.****The expression 0.175 - 0.841/T is the Lewis form factor for****In standard taper roller bearings, the angle of taper of outer raceway is****A single strap butt joint is always in __________ shear.****Fabric belts are used in industrial applications because****The velocity factor for very accurately cut and ground metallic gears operating at velocities upto __________…****Residual stress in materials****The smallest diameter of an external or internal screw thread is known as****In designing a key, it is assumed that the distribution of forces along the length of key****According to I.B.R., the factor of safety of riveted joint should not be less than****A bolt of M 24 × 2 means that****The shock absorbing capacity of a bolt may be increased by****The ratio of endurance limit in shear to the endurance limit in flexure is****A screw is said to be a self locking screw, if its efficiency is****A feather key is generally**