Machine Design Which of the following statement is correct regarding power screws? 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% 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% ANSWER DOWNLOAD EXAMIANS APP
Machine Design The design calculations for members subject to fluctuating loads with the same factor of safety, yield the most conservative estimates when using Goodman relation None of these Gerber relation Soderberg relation Goodman relation None of these Gerber relation Soderberg relation ANSWER DOWNLOAD EXAMIANS APP
Machine Design An open coiled helical compression spring 'A' of mean diameter 50 mm is subjected to an axial load ‘W’. Another spring 'B' of mean diameter 25 mm is similar to spring 'A' in all respects. The deflection of spring 'B' will be __________ as compared to spring 'A'. One-fourth One-half Double One-eighth One-fourth One-half Double One-eighth ANSWER DOWNLOAD EXAMIANS APP
Machine Design According to Unwin's formula, the relation between the diameter of rivet hole (d) and the thickness of plate (t) is given by (where d and t are in mm) d = 1.6√t d = 6√t d = √t d = 2√t d = 1.6√t d = 6√t d = √t d = 2√t ANSWER DOWNLOAD EXAMIANS APP
Machine Design The stress in the bar when the load is applied suddenly is __________ as compared to the stress induced due to gradually applied loads. Same Double Three times Four times Same Double Three times Four times ANSWER DOWNLOAD EXAMIANS APP
Machine Design The buckling load will be maximum for a column, if One end of the column is hinged and the other end is free Both ends of the column are clamped One end of the column is clamped and the other end is free Both ends of the column are hinged One end of the column is hinged and the other end is free Both ends of the column are clamped One end of the column is clamped and the other end is free Both ends of the column are hinged ANSWER DOWNLOAD EXAMIANS APP
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