162. The chief superiority of keyed AGC system is that it does not utilize
A. blanking
B. equalizing
C. horizontal sync
D. vertical sync

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163. The picture tube employed by a colour TV receiver is
A. one-colour
B. two-colour
C. three-colour
D. B & Wand three-colours

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164. The three primary colours are
A. red, green, blue
B. red, orange, blue
C. red, blue, green
D. red, black, green

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165. Additive primary colours are
A. red, white, blue
B. red, yellow, blue
C. blue, red and green
D. R?Y, B?Y and G?Y

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166. Additive complementary colour are
A. yellow, red and blue
B. yellow, cyan and magneta
C. orange, violet and yellow
D. R?Y, B?Y and G?Y

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167. The subtractive primary colours are
A. red, yellow and blue
B. red, green and blue
C. red, white and blue
D. R?Y, B?Y and G?Y

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168.  The saturation of a colour is decreased when it is blended with
A. black light
B. itself
C. white light
D. red, yellow or blue light

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