A) colour of the working plane surface B) reflectance of internal surfaces C) proportion of the room D) the lumen output of the lamps. Ans : (A)
A) salt water B) acid etching C) ammonia D) ozone. Ans : (B)
A) 25 W B) 100 W C) 300 W D) 1000 W. Ans : (C)
A) cap is filled by cement B) cap is made of brass C) cap is screw type D) cap diameter is 15 mm. Ans : (D)
A) reduce the glare B) improve efficiency C) change the colour of light D) retard evaporation of tungsten filament. Ans : (D)
A) 10 to 18 lumens/watt B) 50 to 80 lumens/watt C) 100 to 180 lumens/watt D) 200 to 300 lumens/watt. Ans : (A)
A) object should be viewed from a close vicinity B) object should be viewed from a distance C) object should be moved constantly D) viewer should move constantly. Ans : (B)
A) Cleat glass B) Serrated glass C) Milk glass D) Opalescent glass. Ans : (C)
A) Milk glass B) Clear glass C) Opalescent glass D) Serrated glass. Ans : (B)
A) excessive lighting contrast in the field of vision B) excessive luminance C) either of (A) or (B) above D) none of the above. Ans : (C)