Machine Design Which of the following statement is correct regarding power screws? The efficiency of a self locking screw can not be more than 50% Both (A) and (B) If the friction angle is less than the helix angle of the screw, then the efficiency will be more than 50% The efficiency of Acme (trapezoidal) thread is less than that of a square thread The efficiency of a self locking screw can not be more than 50% Both (A) and (B) If the friction angle is less than the helix angle of the screw, then the efficiency will 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 stress which vary from a minimum value to a maximum value of the same nature (i.e. tensile or compressive) is called Repeated stress Fluctuating stress Alternating stress Yield stress Repeated stress Fluctuating stress Alternating stress Yield stress ANSWER DOWNLOAD EXAMIANS APP
Machine Design The temperature at which the new grains are formed in the metal is known as Recrystallization temperature None of these Upper critical temperature Lower critical temperature Recrystallization temperature None of these Upper critical temperature Lower critical temperature ANSWER DOWNLOAD EXAMIANS APP
Machine Design Two shafts of the same length and material are joined in series. If the ratio of their diameters is 2, then the ratio of their angles of twist will be 8 16 2 4 8 16 2 4 ANSWER DOWNLOAD EXAMIANS APP
Machine Design Three different weights fall from a certain height under vacuum. They will take Times inversely proportional to weight to reach earth Same time to reach earth Times proportional to weight to reach earth None of these Times inversely proportional to weight to reach earth Same time to reach earth Times proportional to weight to reach earth None of these ANSWER DOWNLOAD EXAMIANS APP
Machine Design In a belt drive, if the pulley diameter is doubled keeping the tension and belt width constant, then it will be necessary to Decrease the key length Increase the key width Increase the key length Increase the key depth Decrease the key length Increase the key width Increase the key length Increase the key depth ANSWER DOWNLOAD EXAMIANS APP
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