Mine Ventilation - Practice Test

[#136] Principle behind the rekins interferometer is

(A) infrared spectometring

(B) difference in refractive index

(C) reaction of methane with same chemicals

(D) unbalanced electric circuits

Correct Answer

(B) difference in refractive index

[#137] The temperature and relative humidity of air increase in the vicinity of a place of . . . . . . . .

(A) slow oxydation

(B) absorbtion

(C) sp. heating

(D) None

Correct Answer

(C) sp. heating

[#138] Automatic fire damp detector operates as the principle of . . . . . . . .

(A) wheat stone bridge

(B) wire gauze

(C) infrared

(D) reaction of methane with chemicals

Correct Answer

(A) wheat stone bridge

[#139] The wet kata for light manual workers is

(A) 18

(B) 10

(C) 8

(D) 25

(E) 18

(F) 10

(G) 8

(H) 25

Correct Answer

(D) 25
(H) 25

[#140] The unit bar used by the metrologists to measure the atmospheric pressure is equivalent to

(A) 20 N/m 2

(B) 10 N/m 2

(C) 15 N/m 2

(D) 5 N/m 2

Correct Answer

(B) 10 N/m 2

Mine Ventilation - Study Mode

[#136] Principle behind the rekins interferometer is

Correct Answer

[#137] The temperature and relative humidity of air increase in the vicinity of a place of . . . . . . . .

Correct Answer

[#138] Automatic fire damp detector operates as the principle of . . . . . . . .

Correct Answer

[#139] The wet kata for light manual workers is

Correct Answer

[#140] The unit bar used by the metrologists to measure the atmospheric pressure is equivalent to

Correct Answer