Creep is the_______________?

A. 51
B. 62
C. 70
D. 78

A. G/8
B. G/10
C. G/12
D. G/15
where G is the gauge

A. 20 mm/sec
B. 35 mm/sec
C. 55 mm/sec
D. 65 mm/sec

A. increase the lateral strength
B. increase the vertical stiffness
C. avoid the stress concentration
D. reduce the wear

A. 1
B. 2
C. 3
D. none of the above

A. center to center of rails
B. running faces of rails
C. outer faces of rails
D. none of the above