Machine Design - Practice Test

(A) The efficiency of a self locking screw can not be more than 50%

(B) The efficiency of Acme (trapezoidal) thread is less than that of a square thread

(C) If the friction angle is less than the helix angle of the screw, then the efficiency will be more than 50%

(D) Both (A) and (B)

(D) Both (A) and (B)

(A) Jam nut

(B) Castle nut

(C) Sawn nut

(D) Ring nut

(D) Ring nut

(A) Strong in buckling about X-axis

(B) Strong in buckling about Y-axis

(C) Equally strong in buckling about X-axis and Y-axis

(D) Any one of the above

(C) Equally strong in buckling about X-axis and Y-axis

(A) Friction angle is less than helix angle

(B) Friction angle is more than helix angle

(C) Friction angle is equal to helix angle

(D) Efficiency of screw is 100%

(A) Friction angle is less than helix angle

(A) Compression

(B) Tension

(C) Shear

(D) Combined loads

(B) Tension

Machine Design - Study Mode