Machine Design Which of the following statement is correct regarding power screws? If the friction angle is less than the helix angle of the screw, then the efficiency will be more than 50% Both (A) and (B) The efficiency of a self locking screw can not be more than 50% The efficiency of Acme (trapezoidal) thread is less than that of a square thread If the friction angle is less than the helix angle of the screw, then the efficiency will be more than 50% Both (A) and (B) The efficiency of a self locking screw can not be more than 50% The efficiency of Acme (trapezoidal) thread is less than that of a square thread ANSWER DOWNLOAD EXAMIANS APP
Machine Design The taper on key is given on Top side only Any side On both sides Bottom side only Top side only Any side On both sides Bottom side only ANSWER DOWNLOAD EXAMIANS APP
Machine Design Residual stress in materials Acts when external load is applied Is independent of external loads Is always harmful Becomes zero when external load is removed Acts when external load is applied Is independent of external loads Is always harmful Becomes zero when external load is removed ANSWER DOWNLOAD EXAMIANS APP
Machine Design Yield point in fatigue loading as compared to static loading is Higher Same Lower Depends on other factors Higher Same Lower Depends on other factors ANSWER DOWNLOAD EXAMIANS APP
Machine Design Oil in journal bearing should be applied at the point where load is Nil or lightest Any one of the above Maximum Average Nil or lightest Any one of the above Maximum Average ANSWER DOWNLOAD EXAMIANS APP
Machine Design The temperature at which the new grains are formed in the metal is known as Lower critical temperature None of these Recrystallization temperature Upper critical temperature Lower critical temperature None of these Recrystallization temperature Upper critical temperature ANSWER DOWNLOAD EXAMIANS APP
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