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/2 45° + φ/2 45° - φ 90° - φ 45° - φ/2 45° + φ/2 45° - φ ANSWER DOWNLOAD EXAMIANS APP
Machine Design The connecting rod bolts are tightened up so that tightening stress Approaches yield point Is just sufficient to hold parts together Is 50% of yield point Is about yield point divided by safety factor Approaches yield point Is just sufficient to hold parts together Is 50% of yield point Is about yield point divided by safety factor ANSWER DOWNLOAD EXAMIANS APP
Machine Design A sliding bearing in which although lubricant is present, the working surfaces __________ contact each other at least part of the time, is called boundary lubricated bearing. Fully Partially Either A or B None of these Fully Partially Either A or B None of these ANSWER DOWNLOAD EXAMIANS APP
Machine Design In a boundary lubricated bearing, there is a __________ of lubricant between the journal and the bearing. Thin film None of these Either A or B Thick film Thin film None of these Either A or B Thick film ANSWER DOWNLOAD EXAMIANS APP
Machine Design For longitudinal joint in boilers, the type of joint used is Butt joint with double cover plate Any one of the above Butt joint with single cover plate Lap joint with one ring overlapping the other Butt joint with double cover plate Any one of the above Butt joint with single cover plate Lap joint with one ring overlapping the other ANSWER DOWNLOAD EXAMIANS APP
Machine Design The expression 0.175 - 0.841/T is the Lewis form factor for 20° stub system 20° full depth involute system None of these 14½° composite and full depth involute system 20° stub system 20° full depth involute system None of these 14½° composite and full depth involute system ANSWER DOWNLOAD EXAMIANS APP
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