Miscellaneous In Mining - Study Mode
[#86] In self contained O 2 breathing apparatus the weaver can take more O 2 than gets through the circuit by the . . . . . . . .
Correct Answer
(C) Bypass valve
[#87] The cooling agent in protosorb breathing apparatus is . . . . . . . .
Correct Answer
(A) Sodium phosphate
[#88] The weight of fuel oil in GL-60 flame safety lamp.
Correct Answer
(B) 1.7 kg
[#89] Inhalation of iron dust causes the disease called . . . . . . . .
Correct Answer
(A) Siderosis
[#90] Relighting of lamp becomes trouble some in the following cases.
Correct Answer
Dropping of battery voltage to 2.3 or less