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First, single-choice questions (268 questions) 1. At present, the offset printing plate used in China is based on the treated metal ( ).
A. Copper B. Zinc C. Iron D. Aluminum
2. In the traditional four major printing methods, which printing is not directly printed ( ).
A. lithographic B. letterpress C. gravure D. wire mesh
3. The computer processed image is obtained by digitizing the analog image and consists of a certain number of pixels (points), each of which has ( ).
A. Coordinate value B. Coordinate value and brightness value C. Luminance value D. Gray value
4. In the HSB color mode used by Photoshop, which color is represented by H=240°, S=100%, B=100% ( ).
A. Red B. Green C. Blue D. Black
5. If the lithographic paper is coated paper, the number of commonly used dot lines is ( ).
A.175 lines / inch B.250 lines / inch C. 40 lines / cm D.175 lines / points
6. In the four-color version, the color version with the dot angle of 90 degrees is ( ).
AK version BM version CC version DY version
7. The thickness of the ink layer of the offset printing is generally about ( ).
A.5mm B.5? m C.12? m D.30? m
8. When using AM screen printing, the more the number of dots ( ), the more the basic unit of the image is displayed, the finer the expression of the image.
A. high, big B. high, small C. low, big D. low, small
9. It has been found through experiments that the Moire fringe produced when the angle difference of the dot is ( ) is the most delicate. The most beautiful.
A.75 B.45 C.30 D.15
10, the bright part of the print is generally used () to present the color.
A. The grid is juxtaposed B. The dot is overlapped C. The dot is crossed D. The dot is combined
11. In the CIE1931 chromaticity diagram, the coordinates of the white light are ( ).
Ax=y=z=0.5 Bx=y=z=0 C. x=y=z=1 D. x=y=z=0.3333
12. When the PS version is used, the commonly used light source is ( ) light source.
A.CO2 laser B. Ultraviolet light C. White light D. Argon ion laser
13. The FM screening technology is realized by changing the spatial distribution of the network points.
A. Amplitude B. Size C. Frequency D. Depth
14. The color temperature of the color separation light source should match the color sensitivity of the color separation film. The color temperature of the color separation light source is generally ( ), and its spectral energy distribution is more in line with the requirements of plate color separation.
A. 5000-6500K B. 3000-4000K C. 2000-3000K D. 7000-8000K
15. The higher the ( ) of the scanner, the larger the amount of image information that can be acquired, and the stronger the ability to distinguish details.
A. Bit depth B. Optical resolution C. Signal to noise ratio D. Maximum resolution
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