Video Engineering MCQ Questions and Answers – Television Fundamentals – Monochrome and Color Camera


This set of Video Engineering Multiple Choice Questions & Answers focuses on “Television Fundamentals – Monochrome and Color Camera”.

1. Which is the first basic equipment in a TV?
a) Camera
b) Bandwidth
c) Pixel
d) Resolution
View Answer

Answer: a
Explanation: Monochrome and color camera is the first and basic equipment in a TV. The input to a camera is the light from the picture or scene to be televised and output obtained from camera is the electrical signal corresponding to the information contained in picture.

2. TV camera is digital to human eye.
a) True
b) False
View Answer

Answer: b
Explanation: The TV camera is just analogous to human eye. The basic principle of all TV cameras is based on the fact that each picture may be assumed to be composed of small elements with different light intensity. The camera picks up each element and by transducing action converts it into “electrical signal” proportional to its brightness. There is a photosensitive layer called target in each camera which performs this job.

3. With which material is the signal plate coated in a Vidicon camera tube?
a) Photoconductive
b) Photosensitive
c) Photo acoustic
d) Photo transitive
View Answer

Answer: a
Explanation: The signal plate is a conducting very thin metallic film so it is transparent. One side of this film facing cathode is coated with a very thin layer of photoconductive material (Antimony Trisulphide). This side is scanned by electron beam. The optical image is focused on the other side of this film.
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4. Of which material is the faceplate of a vidicon camera tube made?
a) N – type semiconductor
b) Ring connector
c) Glass or quartz
d) P – type semiconductor
View Answer

Answer: c
Explanation: Vidicon camera tube is based on the photoconductive properties of semiconductors that are decrease in resistance with the amount of incident light. The faceplate of the Vidicon camera tube is made up of glass or quartz. Faceplate is present after the imaging lens in a vidicon camera tube.

5. How many lines of resolution can be achieved under practical conditions in Vidicon camera tube?
a) 150
b) 750
c) 250
d) 350
View Answer

Answer: d
Explanation: The Vidicon camera tube has low cost and has simple adjustment. It is based on the photoconductive properties of semiconductors. The sensitivity is large in the Vidicon camera tube. The resolution of the order of 350 lines can be achieved under practical conditions.

6. With which material is the Plumbicon camera tube made?
a) Lead mono-oxide
b) Potassium mono-oxide
c) Aluminum bi-oxide
d) Xenon mono-oxide
View Answer

Answer: a
Explanation: The construction of a plumbicon camera tube is similar to that of a standard vidicon except for the target material. The plumbicon has a new type of photoconductive target i.e., lead monoxide (Pbo). In plumbicons, the un-illuminated or the dark current is negligible and also it is temperature independent.

7. Which type of diode is formed in the plumbicon tube?
a) Schottky
b) LED
c) PIN
d) Zener
View Answer

Answer: c
Explanation: There is a PIN diode that is formed in the plumbicon tube. Initially PIN diodes are reverse biased as the n-type material is connected to the positive supply voltage and P type material will be facing electrons. When light falls on the target the diode becomes forward biased upon the extent depending upon light intensity. The electric field gradient in the depletion layer of the PIN diode is very high.

8. After entering into color camera tube the light is splits into how many paths?
a) 1
b) 2
c) 3
d) 4
View Answer

Answer: c
Explanation: In a color camera tube, light enters the lens and is split into three paths with the help of dichroic mirrors and color filters. A dichroic mirror is a mirror with significantly different reflection or transmission properties at two different wavelengths. Thus red, green and blue filters are used.

9. Which tube was the only tube to use primary RGB colors?
a) Trinicon single tube color camera
b) Color camera tube
c) Plumbicon camera tube
d) Vidicon camera tube
View Answer

Answer: a
Explanation: Trinicon is a registered trademark of Sony. It uses a vertically striped RGB color filter over the faceplate of an otherwise standard vidicon imaging tube to segment the scan into corresponding red, green and blue segments. Trinicon was the only tube uses the primary RGB colors. The trinicon featured a large dynamic range of operation.

10. Which of the following camera uses photo-diodes, MOS capacitors and shift registers?
a) Solid state video camera
b) Color camera
c) Trinicon single tube color camera
d) Vidicon camera
View Answer

Answer: a
Explanation: Solid state video cameras are the cameras of the new generation. The solid state video cameras used Semiconductor devices like photodiodes, MOS capacitors and shift registers (for scanning purpose).

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Manish Bhojasia - Founder & CTO at Sanfoundry
Manish Bhojasia, a technology veteran with 20+ years @ Cisco & Wipro, is Founder and CTO at Sanfoundry. He lives in Bangalore, and focuses on development of Linux Kernel, SAN Technologies, Advanced C, Data Structures & Alogrithms. Stay connected with him at LinkedIn.

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