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NCPIC Sheetfed Offset Practice Test
Below is a practice test to gauge your knowledge and expertise on the sheetfed offset printing process. This is not a pass/fail test, rather helps you determine how prepared you are to take other tests offered by the National Council. All questions and answers are copyrighted material and are the sole property of the National Council for Print Industry Certifications.
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1) To increase productivity, some presses are designed to print on both sides of a sheet of paper during one pass through a press. This is called:
b. Over and under
c. Multicolor printing
d. All of the above
2) _________ controls the absorption of printing ink and helps reduce the picking of surface fibers.
b. Surface sizing
3) Excess acid in the fountain solution causes which of the following printing problems?
c. Increased ink film thickness
d. Improper drying of ink
4) Which of the following is a recommended remedy for streaks appearing horizontally in the printed image?
a. Loosen the blanket
b. Remove excess packing
c. Increase plate-to-blanket pressure
d. Add more ink
5) The ________ sits between two oscillator rollers and serves to smooth, condition, and transfer ink, connecting the other rollers in the system.
a. Ductor roller
b. Rider roller
c. Distributor roller
d. Form roller
6) Ghosting most often appears in:
7) In a 10-minute period, an ideal lithographic ink should:
a. Pick up 0% of its weight in water
b. Very gradually pick up 5–10% of its weight in water
c. Initially pick up 30–40% of its weight in water and then stabilize
d. Quickly pick up 100% of its weight in water
8) Picking, plucking, tearing, and similar problems occur when paper or coating is not strong enough to withstand the pull of the inked blanket. The principal causes are insufficient bonding strength in the paper or excessive ink tack. Which of the following recommendations helps to minimize or eliminate surface rupture problems?
a. Increase ink tack
b. Use a blanket with a smoother surface
c. Decrease press speed
d. Increase the pressure between the impression and blanket cylinders
9) Blankets usually have their thickness marked on the back. Even so, all new blankets should be checked by making a number of measurements at the center and edges of each blanket. The device best suited for measuring the thickness of blankets is:
a. Packing gauge
b. Dead weight micrometer
d. Machinist isometer
10) Standard viewing conditions are necessary to communicate the desired results and to ensure accuracy and consistency in color reproduction. One of the standard viewing conditions specifies that the surround (the surrounding area) should be a special color—Munsell N8/. Munsell N8/ is what color?
a. Bright white
c. Yellowish white
11) Which of the following would be considered a typical trapping value?
12) Non-uniform blanket thickness is a likely cause of:
b. Uneven impression
c. Image blinding
d. Low-density printing
13) _________ is a densitometric measurement that indicates how well the three-quarter tone to shadow areas of an image are reproducing on press.
a. Dot gain
b. Print contrast
c. Gray balance
14) Because of the danger of static charges resulting in a flash fire, containers must be __________ before transferring flammable liquids.
a. Carefully inspected
b. Sealed air-tight
c. Crated and packed
d. Grounded and bonded
15) To maintain image quality during the pressrun, the operator is concerned with the ink film thickness being printed on the paper. When ink films are printed too thickly, many problems result including which of the following:
a. Premature drying
b. Halftone plugging
d. All of the above
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