Machine Design If T is the actual number of teeth on a helical gear and φ is the helix angle for the teeth, then formative number of teeth is written as T sec³φ T/sec³φ T sec²φ T cosecφ T sec³φ T/sec³φ T sec²φ T cosecφ ANSWER DOWNLOAD EXAMIANS APP
Machine Design The centrifugal tension in belts Decreases the power transmitted Increase the wrap angle Increases the belt tension without increasing power transmission Increases the power transmitted Decreases the power transmitted Increase the wrap angle Increases the belt tension without increasing power transmission Increases the power transmitted ANSWER DOWNLOAD EXAMIANS APP
Machine Design The load cup of a screw jack is made separate from the head of the spindle to Enhance the load carrying capacity of the jack Reduce the effort needed for lifting the working load Reduce the value of frictional torque Prevent the rotation of load being lifted Enhance the load carrying capacity of the jack Reduce the effort needed for lifting the working load Reduce the value of frictional torque Prevent the rotation of load being lifted ANSWER DOWNLOAD EXAMIANS APP
Machine Design In a flat belt drive, if the slip between the driver and belt is 1 %, between the belt and follower is 3% and driver and follower pulley diameters are equal, then velocity ratio of the drive will be 0.97 0.98 0.96 0.99 0.97 0.98 0.96 0.99 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 4 τ τ/2 2 τ τ 4 τ τ/2 2 τ τ ANSWER DOWNLOAD EXAMIANS APP
Machine Design Screws used for power transmission should have High efficiency Very fine threads Low efficiency Strong teeth High efficiency Very fine threads Low efficiency Strong teeth ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS