This set of Video Engineering Multiple Choice Questions & Answers (MCQs) focuses on “A Plasma Color, LCD Colour, Single and 3-LCD Colour Receivers”.
1. Which of the following TV receiver can be used for mono and stereo sound systems?
a) Plasma
b) HD
c) OLED
d) 3D
View Answer
Explanation: The signal to the plasma color receiver can be from NTSC or PAL systems. It is also adaptable with 1080 TV transmission. It can be used for both mono and stereo sound systems. The receiver screen has two speakers mounted on its side that gives the audio output (Virtual Dolby Turbo sound).
2. Which of the following is an important feature in Plasma receivers?
a) Power saving
b) Viewing angles
c) Color Enhancer
d) Screen size
View Answer
Explanation: The important features of plasma receivers are motion enhancer, color enhancer, contrast enhancing and detail enhancing. In color enhancer, color in a specific section can be adjusted without any effect on the surrounding area. Contrast enhancing, enhances the contrast ratio.
3. LCD color receivers are of three types.
a) True
b) False
View Answer
Explanation: The above statement is false. LCD receivers are of two types, single and 3 LCD receivers. In single LCD receiver the picture is formed directly on the LCD panel which acts as a screen whereas 3 LCD receivers are projection type. In 3 LCD receivers, LCDs are used as light bulbs and picture is projected on glare resistant tough fiber screen located in front of the television box.
4. Which mirror is the mirror with remarkable different reflection or transmission properties at two different wavelengths in LCD color receivers?
a) Convex
b) Concave
c) Dichroic
d) Plane
View Answer
Explanation: In LCD color receivers a dichroic mirror is a mirror with significantly different reflection or transmission properties at two different wavelengths. Each LCD varies light intensity with the value of R, G or B video signals which are continuously coded in the LCD chips. The light outputs from these three LCDs are then collected by the prism and is projected on the screen.
5. Generally the size of single LCD receivers varies from 20 inch to 32 inch.
a) True
b) False
View Answer
Explanation: Many LCD fabricators fabricate single LCD receiver with different sizes varying from 20 inch to 32 inch. Larger screens were not possible because of the difficulty of fabrication of large size LCD panels for direct picture display in older days. But nowadays it is possible to fabricate larger than 20-32 inch.
6. Which technology uses three LCD panels to produce image?
a) 3 LCD color receiver
b) Plasma color receiver
c) Single LCD receiver
d) CRT color receiver
View Answer
Explanation: 3 LCD is a video projection system that uses three LCD panels to produce image. The three key advantages of 3 LCD televisions are:
i) A brighter picture even in well-lit rooms
ii) Natural colors are displayed with intense vibrancy
iii) High detail for spectacular HD performance
Sanfoundry Global Education & Learning Series – Video Engineering.
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