LED and LCD TV Short Questions and Answers

Questions

41 What does the availability of LCD in 16 x 2 typical value indicate ?

A 16 characters per line with 2 such lines

B 16 lines per pixel with two such sets

C 16 lines per character with 2 such lines

D 16 pixels per line with 2 such sets

View Answer

Answer: 16 characters per line with 2 such lines

42 Which of the following camera tube uses lead oxide (PbO) for the photoconductive target plate?

A Plumicon

B Image Orthicon

C Vidicon

D Saticon

View Answer

Answer: Plumicon

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43 A low-contrast picture in which white seems flat and lacking in detail suggest

A Insufficient Scanning Width

B High Gain In The Amplifier

C Excessive Gamma

D Low Beam Current

View Answer

Answer: Low Beam Current

44 The part of the visible spectrum where camera pickup tubes have the greatest output is

A Yellow-Green

B Infrared

C Red

D Blue

View Answer

Answer: Yellow-Green

45 Beam alignment magnets for the camera tube are adjusted while rocking which control?

A Electrical focus

B Beam current

C Optical focus

D Shading

View Answer

Answer: Electrical focus

46 Special effects and production switching are done by the

A SEG

B CCU

C Sync generator

D ENG camera

View Answer

Answer: SEG

47 In gamma correction the is stretched by the picture tube.

A White

B Red

C Black

D Gray

View Answer

Answer: White

48 What is the typical anode voltage for a 25-in color picture tube?

A 30 kV

B 1 kV

C 10 kV

D 30 V

View Answer

Answer: 30 kV

49 What are the phosphor numbers, respectively, for monochrome and color picture tubes?

A P4 and P22

B P1 and P4

C P1 and P22

D P4 and P1

View Answer

Answer: P4 and P22

50 The crossover point for focusing is formed by the electron lens.

A Second

B Fourth

C Cathode

D First

View Answer

Answer: First

40 For the operation of FET with TTL logic, the threshold voltage of FET shall be

A 2.2 V

B 4 V

C -12 V

D -4 V

View Answer

Answer: 2.2 V

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