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Printing ProcessesIV > Chapter 3 Quiz Questions > Flashcards

Chapter 3 Quiz Questions Flashcards

0
Q

When printing with quickset inks the rigidity rapidly increases during____________. With heatset inks the rigidity increase at ____________.

A

When printing with quickset inks the rigidity rapidly increases during absorption. With heatset inks the rigidity increases at the chill rolls.

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1
Q

When does heatset ink become completely dry?

A

When it is off press

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2
Q

Which type of heatset web offset press employs a floating dyer?

A

Blanket-to-Blanket

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3
Q

Catalytic oxidizers heat the exhaust from a heatset dryer to ______. Thermal oxidizers heat the exhaust to _________.

A

Catalytic oxidizers heat the exhaust from a heatset dryer to 600-800F. Thermal oxidizers heat the exhaust to 1400-1500F

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4
Q

Web temperature can be controlled at the chill rolls by:

A

Changing the temperature of the water and changing the rate of water circulation.

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5
Q

Chill roll tacking increases the attraction between the web and the chill rolls by using what?

A

Electrostatic force

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6
Q

Higher press speed will _______ the dwell time of the web, while longer dryers will ______ the dwell time of the web.

A

Higher press speed will decrease the dwell time of the web, while longer dryers will increase the dwell time of the web.

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7
Q

The web temperature after the last chill roll should be no more than ___F?

A

75F

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8
Q

The order that the chill rolls are plumbed goes:

A

Last to first, and the first chill roll should cool the web by 40-50%

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9
Q

Remoisturizers are used for what type of problems?

A

Paper growth and static electricity

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10
Q

Do news inks dry by absorption and solidification of resins in the chill roll section?

A

False

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11
Q

Chill roll over speed should typically be set to?

A

1-2%

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12
Q

Coated webs normally require ______ dryer temperatures than uncoated webs.

A

Coated webs normally require higher dryer temperatures than uncoated webs.

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13
Q

What are the three benefits of the sine wave produced by the hot air dryer?

A
  • Improved web control
  • Prevention of corrugating wrinkles
  • Prevention of web flutter
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14
Q

What is the boundary layer?

A

It is the thin layer of air that travels with the web as it moves through the dryer.

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15
Q

When using a split web to determine the nose setting, what does an overlap mean?

A

This means that the former board angle is too low

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16
Q

What are the first set of rollers that follow the former board called?

A
  • Guide rollers
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17
Q

On a combination folder, what is the correct sequence of folds?

A

Former fold, jaw fold, chopper fold

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18
Q

The guide rollers can be skewed to maintain even _________ on the former.

A

The guide rollers can be skewed to maintain even tension on the former.

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19
Q

How does a jaw folder deliver a folded signature?

A

With the spine of the signature out , leading.

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20
Q

What is the correct location of the collect cylinders?

A
  • After the former but before the jaw folder
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21
Q

What is the circumference of a collect cylinder?

A

It is three times the circumference of the knife cylinder.

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22
Q

On a full web press what would a collect cylinder be used for?

A

For digest size

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23
Q

True or False a Ribbon folder uses a collect cylinder?

A

True

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24
Q

What does the double-former fold result in? And what is it common for?

A

It results in an open head signature and it is common for newspapers

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25
Q

Which type of folder most limits the press speed?

A

The chopper folder

26
Q

Which in-line gluing system is similar to a flexo printing unit?

A

Pattern Gluer

27
Q

Which perforating device makes angled perforations to direct paper tissues?

A

Gusset Perforator

28
Q

The double-chopper combination folder is designed to improve what property of the folder?

A

The speed

29
Q

What is the cutoff dimension for a web press that uses the collect feature?

A

Half the circumference of the plate cylinder

30
Q

What does the moveable jaw on a jaw folder seize?

A

It seizes the spine of the signature

31
Q

What combination of folders is required to create a magazine size signature? With a 34 wide web and 22 cutoff

A

Former, jaw, chopper

32
Q

What combination of folders is required to create a magazine size signature? With a 17 wide web and 22 cutoff

A

Former and Jaw

33
Q

You are perfecting on a satellite web press where both sides of the web passes through the same printing unit, what is this process called?

A

Double-ending

34
Q

Which two factors determine the signature size of a web press, when the signature is opened flat?

A
  • the cutoff

- the width of the cylinders

35
Q

What term defines a press that uses independent motors controlled via fiber optic links to a central controller?

A

Shaftless press

36
Q

Which web offset press configuration requires an S-wrap to print two colours on one side of the web, using a single printing unit?

A

Blanket-to-Blanket

37
Q

How many units does a blanket-to-blanket press require to print 4 colours on both sides of the web?

A

4 units

38
Q

What are some benefits for using gapless technology in web offset presses?

A

Quicker makeready, shorter runs, saves paper

39
Q

What was the name of the first hapless blanket press called?

A

Heidelberg Harris Sunday press

40
Q

True or false? Gap less blanket presses do not use bearer contact

A

True

41
Q

The blanket circumference is normally the same measurement as what?

A

Web cutoff

42
Q

How should blankets be stored?

A

Flat, face to face

43
Q

What is caused by excessive plate/blanket squeeze?

A

Dot gain

44
Q

What are the parts of a blanket-to-blanket printing unit?

A
  • plate cylinder
  • blanket cylinder
  • inking system
  • dampening system
45
Q

True or False? When the plate gap is centred in the blanket gap, unwanted ink and water on the plate edges won’t transfer to the blanket

A

True

46
Q

What does improper plate bending cause:

A
  • Misregister
  • plate slipping
  • plate cracking
47
Q

Which forms do blankets come in?

A
  • prepunched
  • premounted onto bars
  • gapless blankets
48
Q

What determines the amount of squeeze between the plate and blanket?

A

The total thickness of the plate, blanket and packing sheets on both cylinders

49
Q

If the web is unwinding too _____ the dancer roll will rise, causing ______ braking to be applied.

A

If the web is unwinding too slow the dancer roll will rise, causing less braking to be applied.

50
Q

What is contained in the splicing arm of the flying paster?

A

A knife and a pressure roller

51
Q

What is the proper combination of three infeed metering rollers on a web press?

A
  • 2 driven steel rollers and 1 non-driven rubber roller
52
Q

Which splicing method can a splice be made while the press is running at printing speed?

A
  • the flying paster

- zero-speed method

53
Q

A zero-speed splicer can make Both a ____ & ____?

A

A lap splice and butt splice

54
Q

What uses variable control to control the flow rate of the web?

A

The infeed metering rollers

55
Q

The strongest, most positive control of the web occurs at which nip point?

A

Printing units

56
Q

On a box-tilt device, which rollers are fixed and which are movable?

A

1 and 4 are fixed, 2 and 3 are moveable

57
Q

What are the different types of web break detectors?

A
  • Mechanical
  • Optical
  • Pneumatic
58
Q

Which is the most common type of web break detector?

A

Optical

59
Q

What does the term “fan-out” describe?

A

Relative Print Width

60
Q

Bustle wheels are used to?

A

Bring the edges of the web closer

61
Q

On a flying paster splicing system, what actions occur when the first butt switch is activated?

A
  • The acceleration belt drops on the new roll
  • The next roll rotates into splicing position
  • The splicing arm presses against the surface of the expiring roll
62
Q

Which splicing method requires the lead edge of the new roll to be held by a policing roll, close to the expiring roll, but not touching, just before the splice is made?

A
  • The zero-speed method

Printing ProcessesIV (3 decks)

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