MCQ 1 Hoolamite is a mixture of? 

(A) Potasium superoxide + copper oxide (B) lodine pentaxide + sulphuric acid (C) silica gel +potasium pelladiam sulphate. (D) Manganeese diaoxide + copper oxide

MCQ 2 The minimum ppm of CO detected by CO detectors is?

(A) 2 (B) 5 (C) 10 (D) 50

MCQ 3 Methane gas is also called as?

(A) Stink damp (B) Choke damp (C) White damp (D) Marsh gas

MCQ 4 Ring rose detector works on the principle of?

(A) Diffusion combustion contraction (B) Optical properties (C) Wheatstone bridge (D) Formation of gas cap

MCQ 5 For light manual workers the wet kata thermometer temperature is?

(A) 18 (B) 25 (C) 30 (D) 35

MCQ 6 CO₂ is mostly found at?

(A) middle of the roadway (B) roof (C) any where in mines (D) dip areas of depillaring areas

MCQ 7 Black damp is mixture of?

(A) CO₂ + O₂ (B) CO₂ + CO (C) CO₂ + N₂ (D) CO₂ + H₂

MCQ 8 Velocity pressure is measured by?

(A) Pitot tube (B) U-tube (C) Inclined manometer (D) Barometer

MCQ 9 Static pressure is measured by?

(A) Barometer (B) Venturi meter (C) U-tube (D) Pitot tube

MCQ 10 The permissible limit for the nitrous fumes is?

(A) 7 ppm (B) 5 ppm (C) 50 ppm (D) 10 ppm

MCQ 11 The permissible limit of the H₂S is 

(A) 10 ppm (B) 7 ppm (C) 50 ppm (D) 5 ppm

MCQ 12 Which is formed in stangnent water in old workings in the areas of gob?

(A) CH₄ (B) H₂S (C) CO₂ (D) SO₂

MCQ 13 When mixed with air H2S forms on explosive mixture the limits of inflamability is

(A) 3 − 45 (B) 12 − 75 (C) 4.5 − 75 (D) 5 − 15.4

MCQ 14 In M.S.A CO detector which tubes used?

(A) P.S detector tubes (B) Hoolamite (C) Hopecolite (D) None of these

MCQ 15 Interferometers works on the principle of?

(A) Wheatstone bridge (B) Infraradiation (C) Optical properties (D) Formation of gas cap

MCQ 16 The mostly used blade type in centrifugal fan is?

(A) forward (B) radial (C) backward (D) None of the above

MCQ 17 The permissible limit of CO₂ is?

(A) 1.0 % (B) 0.75 % (C) 1.25 % (D) 0.5 %

MCQ 18 Geothermic gradient in indian coal seam is  _____________.

(A) 1 Degree Celsius per 38m (B) 1 Degree Celsius per 50 m (C) 1 Degree Celsius per 15 m (D) None of the above

MCQ 19 The permissible limit of the SO₂ is

(A) 10 ppm (B) 50p pm (C) 7 ppm (D) 5 ppm

MCQ 20 Mining laws in India require that mine air should contain minimum percentage is?

(A) 17 % (B) 25 % (C) 19 % (D) 21 %

MCQ 21 Cooling power is a combination of temparature of air relative humidity and _____________?

(A) Pressure (B) Moisture content of air (C) Density of air (D) Velocity of air

MCQ 22 H₂S is aslo called a ?

(A) Choke damp  (B) Marsh gas (C) White damp  (D) Stink damp

MCQ 23 Methane can be found at?

(A) Floor (B) Roof (C) Exhaust gases of the locomotive (D) Any place in the roadway

MCQ 24 The speed of the centrifugal fan is?

(A) 1 to 100 rpm (B) 100 to 300 rpm (C) 300 to 1000 rpm (D) Above 1000 rpm

MCQ 25 M.S.A methanometer is worked on the principle of?

(A) Wheatstone bridge (B) Optical properties (C) Infraradiation (D) Formation of gas cap