Q322
Maximum velocities of ventilating air at man hoisting shafts and haulage roads . . . . . . . . other than conveyor roads.
A.
4 m/sec
B.
4.8 m/sec
C.
6 m/sec
D.
8 m/sec
AnswerAnswer: Option D
Solution
Answer: Option D
No explanation is given for this question Let's Discuss on Board