Machine Design Which of the following statement is correct regarding power screws? The efficiency of Acme (trapezoidal) thread is less than that of a square thread The efficiency of a self locking screw can not be more than 50% Both (A) and (B) If the friction angle is less than the helix angle of the screw, then the efficiency will be more than 50% The efficiency of Acme (trapezoidal) thread is less than that of a square thread The efficiency of a self locking screw can not be more than 50% Both (A) and (B) If the friction angle is less than the helix angle of the screw, then the efficiency will be more than 50% ANSWER DOWNLOAD EXAMIANS APP
Machine Design Yield point in fatigue loading as compared to static loading is Higher Lower Same Depends on other factors Higher Lower Same Depends on other factors ANSWER DOWNLOAD EXAMIANS APP
Machine Design Coaxing is the procedure of increasing Fatigue limit by over-stressing the metal by successively increasing loadings Metal resistance to corrosion by coating Metal hardness by surface treatment Metal strength by cycling Fatigue limit by over-stressing the metal by successively increasing loadings Metal resistance to corrosion by coating Metal hardness by surface treatment Metal strength by cycling ANSWER DOWNLOAD EXAMIANS APP
Machine Design When the bolt is very yielding as compared to the connected members, then the resultant load on the bolt will be equal to the Sum of the initial tension and external load applied Initial tension External load applied Initial tension or external load, whichever is greater Sum of the initial tension and external load applied Initial tension External load applied Initial tension or external load, whichever is greater ANSWER DOWNLOAD EXAMIANS APP
Machine Design Set screws are 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 Similar to stud 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 Similar to stud Used to prevent relative motion between parts ANSWER DOWNLOAD EXAMIANS APP
Machine Design Aircraft body is usually fabricated by Casting Welding Pre-casting Riveting Casting Welding Pre-casting Riveting ANSWER DOWNLOAD EXAMIANS APP
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