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ECE Objective Questions { Television Engineering }

36. A single horizontal line across the middle of a TV screen indicates trouble in
A. horizontal section
B. vertical section
C. tuner
D. video section

37. Wavy and slow-rising white hum bars in a TV set are usually caused by a bad
A. flyback transformer
B. picture tube
C. filter
D. rectifier

38. A silvery and out-of-focus TV picture often indicates a bad
A. picture tube
B. high voltage transformer
C. video amplifier
D. rectifier

39. A weak or overloaded picture can usually be corrected by adjusting
A. vertical oscillator
B. horizontal oscillator
C. tuner

40. The three primary colours in the chrominance signal of a colour TV are
A. red, green, orange
B. red, green, blue
C. blue, green, magenta
D. yellow, green, cyan

41. Vivid and strong colours are often referred to as
A. tint
B. luminance
C. chrominance
D. saturation

42.  If a colour TV set has weak colour, the problem is most likely to be in
A. convergence assembly
B. demodulator stage
C. chroma amplifier
D. colour detector

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