31. The company J. K. Dey and sons manufactures of three types of flame safety lamps are . . . . . . . . A. GL-5, GL-50, GL-60 B. GL-4, GL-3 C. Velox 1, Velox 2, Velox 3 D. None Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
32. In the metal mines . . . . . . . . persons are worstly affected by dust. A. Loaders B. Drillers C. Timber men D. Plate layers Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
33. In water barrier must contain atleast . . . . . . . . of water per sq.m. of road way cross section. A. 50 L B. 100 L C. 150 L D. 200 L Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option D No explanation is given for this question Let's Discuss on Board
34. The unit of illumination is S. I unit. A. Lumen B. Lux C. Candela D. None Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
35. Can we use the defective, or repaired components of flame safety lamp. A. Yes B. No C. Sometimes D. All Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
36. No. of washers employed to make outer glass assembly by air tight. A. 1 B. 2 C. 3 D. 4 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
37. The minimum average standards of lighting in main junctions in underground in lumens/sq. ft. A. 1.25 B. 1.5 C. 0.4 D. 1.8 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board
38. Dustiness of a place may be considered at dustyness content of . . . . . . . . the air is moderatly dusty as per Russian text book. A. 1 mg/m3 B. 5 mg/m3 C. 20 mg/m3 D. 10 mg/m3 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
39. The co. efficient of adhesion is, if the surface is dry and free of sand. A. 0.2 B. 0.25 C. 0.15 D. 0.1 Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option B No explanation is given for this question Let's Discuss on Board
40. The fuel recommended to carry the percentage test by flame safety lamp. A. ESSO solvent No. 1425 B. Petrol C. K.Oil D. All Answer & Solution Discuss in Board Save for Later Answer & Solution Answer: Option A No explanation is given for this question Let's Discuss on Board