Grob TV - Basic Television Multiple Choice
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- 1.Which of the following camera tube uses lead oxide (PbO) for the photoconductive target plate?
- A.
Vidicon
- B.
Plumbicon
- 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 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.
- 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.
- A.
CCU
- B.
ENG camera
- C.
SEG
- D.
Sync generator
- 9.
- 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.
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
- 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
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