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) t.σt p.d.σt p.t.σt TRUE ANSWER : ? YOUR ANSWER : ?
The ends of the leaves of a semi-elliptical leaf spring are made triangular in order to Obtain variable moment of inertia (I) in each leaf Have variable bending moment (M) in each leaf Make M/I constant throughout the length of the leaf Permit each leaf to act as an overhanging beam TRUE ANSWER : ? YOUR ANSWER : ?
Plastic flow in ductile materials Increases the seriousness of static loading stress concentration Lessens the seriousness of static loading stress concentration Depends on other considerations Has no effect on it TRUE ANSWER : ? YOUR ANSWER : ?
The helix angle for double helical gears may be made up to 60° 45° 90° 75° TRUE ANSWER : ? YOUR ANSWER : ?
Residual stress in materials Is independent of external loads Is always harmful Acts when external load is applied Becomes zero when external load is removed TRUE ANSWER : ? YOUR ANSWER : ?
According to I.B.R., when the thickness of the boiler shell (t) is less than 8 mm, then the diameter of the rivet hole (d) is obtained by None of these Equating tearing resistance of the plate to the crushing resistance of the rivets Equating tearing resistance of the plate to the shearing resistance of the rivets Equating shearing resistance to the crushing resistance of the rivets TRUE ANSWER : ? YOUR ANSWER : ?
Form coefficient of spring is Load required to produce unit deflection Its capability of storing energy Concerned with strength of wire of spring Ratio of coil diameter to wire diameter TRUE ANSWER : ? YOUR ANSWER : ?
A screw is said to be a self locking screw, if its efficiency is Less than 50% Equal to 50% None of these More than 50% TRUE ANSWER : ? YOUR ANSWER : ?
The maximum shear stress theory is used for Nonferrous materials Plastic materials Ductile materials Brittle materials TRUE ANSWER : ? YOUR ANSWER : ?
The lead angle of a worm is 22.5°. Its helix angle will be 22.5° 90° 45° 67.5° TRUE ANSWER : ? YOUR ANSWER : ?