Machine Design The fatigue stress concentration factor is defined as The product of the endurance limits with and without stress concentration The ratio of endurance limit with stress concentration to the endurance limit without stress concentration All of these The ratio of endurance limit without stress concentration to the endurance limit with stress concentration The product of the endurance limits with and without stress concentration The ratio of endurance limit with stress concentration to the endurance limit without stress concentration All of these The ratio of endurance limit without stress concentration to the endurance limit with stress concentration ANSWER DOWNLOAD EXAMIANS APP
Machine Design The efficiency of a square threaded screw is maximum if the helix angle is equal to(Where φ = Angle of friction) 90° - φ 45° - φ 45° - φ/2 45° + φ/2 90° - φ 45° - φ 45° - φ/2 45° + φ/2 ANSWER DOWNLOAD EXAMIANS APP
Machine Design The helix angle for single helical gears ranges from 15° to 20° 35° to 50° 20° to 35° 10° to 15° 15° to 20° 35° to 50° 20° to 35° 10° to 15° ANSWER DOWNLOAD EXAMIANS APP
Machine Design A triple riveted butt joint with double straps of unequal width is to be designed for a boiler shell. The pitch of the rivets in the outer row is double the pitch in the inner row and zigzag riveting is proposed. Which of the following statement is correct? There are four rivets per pitch length, out of which two are in single shear and two are in double shear There are five rivets per pitch length, out of which four are in double shear and one is in single shear There are four rivets per pitch length, all in double shear There are five rivets per pitch length, all in double shear There are four rivets per pitch length, out of which two are in single shear and two are in double shear There are five rivets per pitch length, out of which four are in double shear and one is in single shear There are four rivets per pitch length, all in double shear There are five rivets per pitch length, all in double shear ANSWER DOWNLOAD EXAMIANS APP
Machine Design When an open coiled helical compression spring is subjected to an axial compressive load, the maximum shear stress induced in the wire is (where D = Mean diameter of the spring coil, d = Diameter of the spring wire, K = Wahl's stress factor, and W = Axial compressive load on the spring) (8WD/ πd3) × K (4WD/ πd3) × K (2WD/ πd3) × K (WD/ πd3) × K (8WD/ πd3) × K (4WD/ πd3) × K (2WD/ πd3) × K (WD/ πd3) × K ANSWER DOWNLOAD EXAMIANS APP
Machine Design Cap screws are Similar to small size tap bolts except that a greater variety of shapes of heads are available Provided with detachable caps Used to prevent relative motion between parts Slotted for a screw driver and generally used with a nut Similar to small size tap bolts except that a greater variety of shapes of heads are available Provided with detachable caps Used to prevent relative motion between parts Slotted for a screw driver and generally used with a nut ANSWER DOWNLOAD EXAMIANS APP
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