The Series
Following is the list of multiple choice questions in this brand new series:
Start Practice Exam Test Questions Part I of the Series
Choose the letter of the best answer in each questions.
1. Which of the following camera tube uses lead oxide (PbO) for the photoconductive target plate?
- A. Vidicon
- B. Plumicon
- C. Saticon
- D. Image Orthicon
2. Camera signal output without sync is called
- A. Black burst
- B. generator lock video
- C. composite video
- D. noncomposite video
3. A low-contrast picture in which white seems flat and lacking in detail suggest
- A. low beam current
- B. high gain in the amplifier
- C. excessive gamma
- D. insufficient scanning width
4. Which of the following camera tubes has minimum lag?
- A. Vidicon
- B. Plumbicon
- C. Saticon
- D. Iconoscope
5. The part of the visible spectrum where camera pickup tubes have the greatest output is
- A. red
- B. blue
- C. yellow-green
- D. infrared
6. Precise scanning size and linearity are most important in
- A. a black-and-white camera
- B. a plumbicon
- C. a single-tube color pickup
- D. a saticon
7. Beam alignment magnets for the camera tube are adjusted while rocking which control?
- A. Optical focus
- B. Electrical focus
- C. Beam current
- D. Shading
8. Special effects and production switching are done by the
- A. CCU
- B. ENG camera
- C. SEG
- D. Sync generator
9. The gamma of the picture tube is
- A. 0.4545
- B. 1.0
- C. 1.4
- D. 2.2
10. If the camera cannot be placed far away enough to include everything in the scene, change the lens to one with a
- A. lower f rating
- B. higher f rating
- C. longer focal length
- D. shorter focal length
11. A typically value of vidicon dark current is
- A. 0.2 uA
- B. about 200 uA
- C. 8 mA
- D. 800 mA
12. A lens has an 8-cm focal and 4-cm diameter. Its f rating is
- A. 2
- B. 4
- C. 8
- D. 32
13. Which of the following is FALSE?
- A. The lens inverts the optical image on the faceplate of the camera tube.
- B. The composite video signal includes the camera signal and sync not blanking
- C. The standard composite video from a camera is 1V p-p with negative sync.
- D. The plumbicon uses a lead oxide layer for the target plate.
14. Which of the following is TRUE?
- A. The diameter of the vidicon image plate is about 5 in. (127 mm)
- B. The plumbicon camera tube uses a silicon target plate.
- C. The composite video signal includes the camera signal and sync but not blanking.
- D. the lens inverts the optical image on the faceplates of the camera tube.
15. Which of the following produces the signal variations for G4 of the vidicon.
- A. Target plate
- B. Wire mesh
- C. Muzzle
- D. Beam control
16. What is the gamma required for the camera tube?
A. 2.2
B. 0.4545
C. 4.545
D. 0.22
17. is more important for the gamma correction for the camera tube.
- A. Color
- B. Monochrome
- C. Both Color and monochrome
- D. Either of Color or monochrome
18. In gamma correction the is stretched by the picture tube.
- A. Black
- B. gray
- C. white
- D. red
19. To how many lax units is the illuminator of 3 fs, approximately equal?
- A. 650
- B. 225
- C. 65
- D. 30
20. What is the diagonal screen size for the 19CP4 picture tube?
- A. 12 in.
- B. 16 in.
- C. 19 in.
- D. 24 in.
21. To what deflection angle does a maximum deflection angle of 45 deg either side center correspond?
- A. 30º
- B. 90º
- C. 120º
- D. 360º
22. What is the usual heater voltage for picture tube?
- A. 1.6 v
- B. 5.6 V
- C. 6.3 V
- D. 9.3V
23. What is the typical anode voltage for a 25-in color picture tube?
A. 10 kV
B. 30 kV
C. 1 kV
D. 30 V
24. Typically, the anode capacitance for a 25-in tube is pT.
- A. 2
- B. 20
- C. 205
- D. 2000
25. When the TV set was turned on, full power was applied to the heater and the picture appeared within a fraction of a second.
- A. Ultor
- B. Implosion
- C. Instant-on operation
- D. Screen persistence
26. What are the phosphor numbers, respectively, for monochrome and color picture tubes?
- A. P1 and P4
- B. P1 and P22
- C. P4 and P22
- D. P4 and P1
27. What is the color of P1 screen phosphor?
- A. Red
- B. Blue
- C. White
- D. Green
28. Which of the following is the most negative (or least positive) electrode is the electron gun?
- A. Cathode
- B. Control grid G1
- C. Screen grid
- D. Focus grid
29. Which is the most position element in the electron gun?
- A. Ultor
- B. Anode
- C. Cathode
- D. Ultor or anode
30. Most of the electrons in the beam flow out of which terminal?
- A. Ultor
- B. Anode
- C. Cathode
- D. Ultor or anode
31. The crossover point for focusing is formed by the electron lens.
- A. first
- B. second
- C. Cathode
- D. fourth
32. In which method in a G3 voltage of 200 V. used for?
- A. low-voltage focus
- B. high-voltage focus
- C. either low or high voltage focus
- D. none of these
33. Small magnets embedded in the yoke housing is correct for _________.
A. yoke position
B. magnetic deflection
C. pinoushion distortion
D. centering adjustments
34. The coils above and below the electron beam of the picture tube are for .
- A. V scanning
- B. H scanning
- C. Either V or H scanning
- D. None of these
35. Neck shadow result when the deflection yoke is .
- A. too near back
- B. too near forward
- C. too far back
- D. too far forward
36. In color picture tube, degaussing should be done the color purity adjustments.
- A. after
- B. before
- C. either way
- D. none at all
37. In color picture tube, degaussing is done with .
- A. direct current
- B. alternating current
- C. 60 Hz alternating current
- D. 90 Hz alternating current
38. When the receiver is first turned on, what current does the ADG circuit have?
- A. High
- B. Low
- C. Both high and low
- D. Neither high nor Low
39. In color picture tube, what does a solid red raster checked for?
- A. good color purity
- B. Convergence
- C. Degaussing
- D. Resetting the yoke
40. Where do the small, white dots in the picture used for?
- A. good color purity
- B. convergence
- C. Degaussing
- D. Resetting the yoke
41. What does the color fringing on the edge of the picture shows?
- A. Misconvergence
- B. Insufficient signal drive
- C. Turned off guns
- D. Red cloud
42. Static convergence is done for the of the screen.
- A. center
- B. edges
- C. left
- D. right
43. Where the permanent magnets used?
- A. static convergence
- B. dynamic convergence
- C. automatic degaussing
- D. resetting the yoke
44. In picture, the basic waveform for dynamic convergence is the ________.
- A. parabola
- B. half a sine wave
- C. full sine wave
- D. parabola or half of sine wave
45. Pincushion magnets are used for picture tubes.
- A. monochrome
- B. color
- C. both color and monochrome
- D. either color or monochrome
46. The abbreviation TW is for pincushion correction.
- A. diagonal
- C. horizontal
- B. vertical
- D. either way
47. The typical dc grid bias for a 19-in, picture tube.
- A. -4 V
- B. –40V
- C. -6 V
- D. -60 V
48. Typical ac signal drive for a 19-in, picture tube.
- A. 8 Vp-p
- B. 40 Vp-p
- C. 120 Vp-p
- D. 140 Vp-p
49. For the picture tube, the brightness control varies the bias signal drive.
- A. dc
- B. ac
- C. either ac or dc
- D. both ac and dc
50. The R, G, and B screen grid adjustments are set for in the picture.
- A. visual cutoff
- B. white highlights
- C. brightness control
- D. gray-scale tracking
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