The concentration of the dust particles of the size 0.5 to 5 microns a – McqOptions

MCQOPTIONS

1.	The concentration of the dust particles of the size 0.5 to 5 microns adjacent to the working face should not be more than
A.	200 particles/cm³
B.	250 particles/cm³
C.	300 particles/cm³
D.	450 particles/cm³
Answer» E.

Discussion

No Comment Found

Related MCQs

For tunnels exceeding 300 m in length, the grade should be provided below
Concrete lining is provided concurrently with the driving operation in case of
The difference of heights of the tunnels above rail tops of BG and MG tracks is kept
Which one of the following statements is not correct for heading and benching method of tunnelling ?
Pick up the mechanical ventilation method used for tunnels from the following:
In case of drift method of tunnelling, the drift may be excavated at
An overhead track on a large truss frame is required in case of car changer by
For B.G. single track, the section of the tunnel must have a width
Which one of the following statements is not correct in respect of setting of an inclined tunnel:
Which one of the following methods of tunnelling does not require the use of time bearing :