The railway carriage couplings have Knuckle threads Buttress threads Acme threads Square threads TRUE ANSWER : ? YOUR ANSWER : ?
According to Indian standards, the diameter of rivet hole is made larger than the basic size of rivet by 2 mm for rivet diameter from 39 mm to 48 mm 1 mm for rivet diameter from 27 mm to 36 mm All of these 0.5 mm up to rivet diameter of 24 mm TRUE ANSWER : ? YOUR ANSWER : ?
The usual clearance provided in hydrodynamic bearing per mm of diameter of shaft is 0.1 micron 10 microns 1 micron 0.01 micron TRUE ANSWER : ? YOUR ANSWER : ?
The taper on a rectangular sunk key is 1 in 32 1 in 100 1 in 16 1 in 48 TRUE ANSWER : ? YOUR ANSWER : ?
A riveted joint is a __________ fastening. Temporary None of these Either A or B Permanent TRUE ANSWER : ? YOUR ANSWER : ?
Tearing resistance required to tear off the plate per pitch length is (where p = Pitch of rivets, d = Dia. of rivet hole, and σt = Permissible tensile stress for plate material) p.d.σt (p - d) t.σt p.t.σt TRUE ANSWER : ? YOUR ANSWER : ?
For low and moderate speed engines, the cam follower should move with Uniform acceleration and retardation Uniform velocity Simple harmonic motion Cycloidal motion TRUE ANSWER : ? YOUR ANSWER : ?
The longitudinal stress is __________ of the circumferential stress. One-half Two-third Double Three-fourth TRUE ANSWER : ? YOUR ANSWER : ?
The stiffness of a closely coiled helical spring subjected to an axial load W is equal to (where G = Modulus of rigidity, and n = Number of active coils) Gd⁴/ 4D3n Gd3/ 8D3n Gd⁴/ 8D²n Gd⁴/ 8D3n TRUE ANSWER : ? YOUR ANSWER : ?
A locking device in which the bottom cylindrical portion is recessed to receive the tip of the locking set screw, is called Jam nut Sawn nut Ring nut Castle nut TRUE ANSWER : ? YOUR ANSWER : ?