Types of Presses

How many different types of press are there?
1. Two
2. Three
3. Four
4. Five
Although not recognised at the time, which press developed in the early 1900’s was the first transverse flow press?
1. Plain press
2. Suction press
3. Grooved press
4. Double felted press
On a grooved press roll, what configuration is the groove?
1. Longitudinal
2. Spiral
3. Concentric circles
4. Can be any of the above
On a suction press, the hole in the shell is a different diameter to the hole in the roll cover. Which is larger?
1. Conical, largest end is the cover
2. Conical, largest end id the shell
3. The cover hole is larger
4. The shell hole is larger
On a grooved roll, how many groves are there to the inch, typically?
1. 4
2. 6
3. 8
4. 10
Which part of the press roll is blind drilled?
1. The cover
2. The roll
3. Both the roll and the cover
4. Could be either the roll or the cover
Which of the following statements is true?
1. Compared to a suction press roll, the holes on a blind drilled roll are smaller and further apart
2. Compared to a suction press roll, the holes on a blind drilled roll are larger and further apart
3. Compared to a suction press roll, the holes on a blind drilled roll are smaller and closer together
4. Compared to a suction press roll, the holes on a blind drilled roll are larger and closer together
Which press is said to be the most effective as a first press?
1. The ENP
2. The shoe press
3. The grooved press
4. The double felted press
The shoe press can be used on which grades of paper and board?
1. Packageing papers
2. Most grades
3. Tissue and Newsprint
4. Newsprint and Printings & Writings
On a shoe press, why does the belt never come into contact with the shoe?
1. There is an air film carried on the underside of the belt, due to its high speed
2. There is a felt between the belt and the shoe
3. There is a water film between the belt and the shoe
4. There is an oil film between the belt and the shoe
What shape is the load shoe on an ENP?
1. Concave
2. Flat
3. Convex
4. It can be any of the above, depending on the manufacturer
What is the typical length of a load shoe?
1. 20 inches or 500mm
2. 15 inches or 375mm
3. 5 inches or 125mm
4. 10 inches or 250mm
What is the nip with of a show press compared to a conventional press?
1. 6-12 times as long
2. 2-7 times as long
3. 4-10 times as long
4. 5-15 times as long
What is the main limitation with traditional roll presses?
1. Nip dwell time
2. Felt design
3. Roll hardness
4. Felt weight
In a shoe press, the aim is to have the nip dwell time increased by what factor, compared to a traditional press?
1. 3 times
2. 12 times
3. 10 times
4. 7 times
What is the main limitation on current ENP’s?
1. Belt design
2. Press felt design
3. Belt construction materials
4. Machine speed
When water is removed from the web as it passes through a press nip where one roll is intensely heated, the process is known as what?
1. A hot spot
2. press drying
3. Hot pressing
4. Impulse drying
When water is removed from the web as it passes through a press nip where one or both rolls are heated to +100 C, the process is known as what?
1. Press drying
2. Hot pressing
3. Impulse drying
4. Wringing
In impulse drying, what temperature range is typically used?
1. 150-200
2. 250-400
3. 300-600
4. 150-500
In which type of pressing is heat used just to reduce water viscosity and surface tension, and thus aid its flow?
1. Impulse drying
2. Microwave
3. Press drying
4. Hot pressing
In impulse drying, what is the typical pressure range employed?
1. 3-6 Mpa
2. 6-9 Mpa
3. 9-12 Mpa
4. 12-15 Mpa
In which type of pressing system are dewatering rates 20 times higher than in the drying section?
1. Double felted presses
2. Hot Pressing
3. Press drying
4. Impulse drying
In which type of press is lignin flow promoted?
1. Impulse drying
2. Press drying
3. Hot pressing
4. Suction press

Types of Presses

Quiz