Machine Design MCQ Questions & Answers | Mechanical Engineering

A. Direct tensile stress

B. Direct compressive stress

C. Direct bending stress

D. Direct shear stress

A. One-half

B. Two-third

C. Three-fourth

D. Double

A. 1.06

B. 1.12

C. 1.26

D. 1.58

A. Varies linearly

B. Is uniform throughout

C. Varies exponentially, being more near the torque-input end

D. Varies exponentially, being less near the torque-input end

A. Equal to

B. sin$$\,\alpha $$ times more than

C. sin$$\,\alpha $$ times less than

D. cosec$$\,\alpha $$ times more than

A. Journal bearing

B. Pedestal bearing

C. Collar bearing

D. Needle bearing

A. Have low starting and low running friction at moderate speeds

B. Have high initial cost

C. Can carry both radial and thrust loads

D. All of these

A. One small nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming

B. A slot is cut partly in middle of nut and then slot reduced by tightening a screw

C. Hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is stewed on the bolt causing a tight grip

D. Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin splitted and bent in reverse direction at other end

A. One smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming

B. A slot is cut partly in middle of nut and then slot reduced by tightening a screw

C. A hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip

D. Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter spitted and bent in reverse direction at other end

A. One smaller nut is tightened over main nut and main nut tightened against smaller one by loosening, creating friction jamming

B. A slot is cut partly in middle of nut and then slot reduced by tightening screw

C. A hard fibre or nylon cotter is recessed in the nut and becomes threaded as the nut is screwed on the bolt causing a tight grip

D. Through slots are made at top and a cotter pin is passed through these and a hole in the bolt, and cotter pin splitted and bent in reverse direction at the other end