Television Picture Tubes – 1 – 2

6. In a colour picture tube, the three beams coverage to a point ………….

(a) at shadow mask
(b) at screen
(c) between G-1 and G-2
(d) 
at internal aquadag coating

ANSWER

EXPLANATION

7. FST gives better contrast because ………….

(a) it reduces reflection
(b) it allows more beam current
(c) it produces more deflection
(d) 
it uses LCDs

ANSWER

EXPLANATION

8. Aquadag coatings form a ………….. in a picture tube.

(a) capacitor
(b) resistor
(c) inductor
(d) 
transformer

ANSWER

EXPLANATION

9. The number of guns in a colour picture tube is ……..

(a) 2
(b) 3
(c) 4
(d) 
5

ANSWER

EXPLANATION

10. Pincushion effect in a colour picture tube can be corrected by …………….

(a) magnetic ring
(b) current through deflection coils
(c) current through convergence coils
(d)
 colour purity adjustment

ANSWER

EXPLANATION

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