Machine Design Screws used for power transmission should have High efficiency Very fine threads Strong teeth Low efficiency High efficiency Very fine threads Strong teeth Low efficiency ANSWER DOWNLOAD EXAMIANS APP
Machine Design The shear plane in case of bolts should Be normal to threaded portion of shank Be parallel to axis of bolt Be across threaded portion of shank Never be across the threaded portion Be normal to threaded portion of shank Be parallel to axis of bolt Be across threaded portion of shank Never be across the threaded portion ANSWER DOWNLOAD EXAMIANS APP
Machine Design When spring index increases, the value of Wahl's stress factor Decreases linearly Increases exponentially Remains same Increases linearly Decreases linearly Increases exponentially Remains same Increases linearly ANSWER DOWNLOAD EXAMIANS APP
Machine Design Two rigid plates are clamped by means of bolt and nut with an initial force F. After tightening, a separating force P (P < F) is applied to the lower plate, which in turn acts on the nut. The tension in the both after this is F P F + P F.P F P F + P F.P ANSWER DOWNLOAD EXAMIANS APP
Machine Design A taper key which fits half in the key way of the hub and half in the key way of shaft, is known as Mitre gears Internal bevel gears Crown Bevel gears Angular bevel gears Mitre gears Internal bevel gears Crown Bevel gears Angular bevel gears ANSWER DOWNLOAD EXAMIANS APP
Machine Design A closely coiled helical spring is acted upon by an axial force. The maximum shear stress developed in the spring is τ. The half of the length of the spring if cut off and the remaining spring is acted upon by the same axial force. The maximum shear stress in the spring in new condition will be τ 4 τ τ/2 2 τ τ 4 τ τ/2 2 τ ANSWER DOWNLOAD EXAMIANS APP
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