Machine Design The efficiency of a square threaded screw is maximum if the helix angle is equal to(Where φ = Angle of friction) 45° + φ/2 45° - φ 90° - φ 45° - φ/2 45° + φ/2 45° - φ 90° - φ 45° - φ/2 ANSWER DOWNLOAD EXAMIANS APP
Machine Design In designing a key, it is assumed that the distribution of forces along the length of key Varies exponentially, being more at the torque-input end Is uniform throughout Varies exponentially, being less at the torque-input end Varies linearly Varies exponentially, being more at the torque-input end Is uniform throughout Varies exponentially, being less at the torque-input end Varies linearly ANSWER DOWNLOAD EXAMIANS APP
Machine Design The ratio of belt tensions (p1/p2) considering centrifugal force in flat belt is given by Where m = mass of belt per meter (kg/m) v = belt velocity (m/s) f = coefficient of friction a = angle of wrap (radians) (P1 - mv²)/ (P2 - mv²) = e–ᶠα P1 / P2 = e–ᶠα P1 / P2 = eᶠα (P1 - mv²)/ (P2 - mv²) = eᶠα (P1 - mv²)/ (P2 - mv²) = e–ᶠα P1 / P2 = e–ᶠα P1 / P2 = eᶠα (P1 - mv²)/ (P2 - mv²) = eᶠα ANSWER DOWNLOAD EXAMIANS APP
Machine Design The bending stress in a curved beam is Zero at the centroidal axis None of these Maximum at the neutral axis Zero at the point other than centroidal axis Zero at the centroidal axis None of these Maximum at the neutral axis Zero at the point other than centroidal axis ANSWER DOWNLOAD EXAMIANS APP
Machine Design If an application calls for stresses on screw threads in one direction only, then the following type of thread would be best suited BSW Acme Buttress Square BSW Acme Buttress Square ANSWER DOWNLOAD EXAMIANS APP
Machine Design The smallest diameter of an external or internal screw thread is known as None of these Pitch diameter Minor diameter Major diameter None of these Pitch diameter Minor diameter Major diameter ANSWER DOWNLOAD EXAMIANS APP
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