Engineering Mechanics An ideal machine is one whose efficiency is Between 70 and 80% Between 60 and 70 % Between 80 and 90% 1 Between 70 and 80% Between 60 and 70 % Between 80 and 90% 1 ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics If the number of pulleys in a system is equal to its velocity ratio, then it is a __________ system of pulleys. Third None of these First Second Third None of these First Second ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics The centre of gravity of a uniform lamina lies at The bottom surface The centre of heavy portion All of these The midpoint of its axis The bottom surface The centre of heavy portion All of these The midpoint of its axis ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics If the resultant of two equal forces has the same magnitude as either of the forces, then the angle between the two forces is 60° 90° 30° 120° 60° 90° 30° 120° ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics Coefficient of friction depends upon None of these Nature of surface only Both (A) and (B) Area of contact only None of these Nature of surface only Both (A) and (B) Area of contact only ANSWER DOWNLOAD EXAMIANS APP
Engineering Mechanics The maximum efficiency of a screw jack is (1 + sinφ)/(1 - sinφ) (1 + tanφ)/(1 - tanφ) (1 - sinφ)/(1 + sinφ) (1 - tanφ)/(1 + tanφ) (1 + sinφ)/(1 - sinφ) (1 + tanφ)/(1 - tanφ) (1 - sinφ)/(1 + sinφ) (1 - tanφ)/(1 + tanφ) ANSWER DOWNLOAD EXAMIANS APP
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