# Test Your Understanding Regarding Jets Vacuum Piping System

Approved & Edited by ProProfs Editorial Team
The editorial team at ProProfs Quizzes consists of a select group of subject experts, trivia writers, and quiz masters who have authored over 10,000 quizzes taken by more than 100 million users. This team includes our in-house seasoned quiz moderators and subject matter experts. Our editorial experts, spread across the world, are rigorously trained using our comprehensive guidelines to ensure that you receive the highest quality quizzes.
| By Jets1
J
Jets1
Community Contributor
Quizzes Created: 2 | Total Attempts: 156
Questions: 13 | Attempts: 65

Settings

• 1.

### What are the 3 main elements in a Jets vacuum toilet system?

• A.

Vacuum toilets, sewage treatment plant+ vacuum piping system

• B.

Vacuum generating unit + piping system for transport of sewage + toilets, urinals, grey water interface units

• C.

Vacuum generating unit + vacuum piping system + STP

B. Vacuum generating unit + piping system for transport of sewage + toilets, urinals, grey water interface units
Explanation
The correct answer is Vacuum generating unit + piping system for transport of sewage + toilets, urinals, grey water interface units. This answer accurately identifies the three main elements of a Jets vacuum toilet system, which are the vacuum generating unit, the piping system for transporting sewage, and the toilets, urinals, and grey water interface units. These elements work together to create a vacuum pressure that efficiently transports waste and grey water from the toilets and urinals to the sewage system.

Rate this question:

• 2.

### Is this true or false?The vacuum level in a toilet piping system should be 40-55% vacuum in idle position.

• A.

True

• B.

False

A. True
Explanation
The statement is true. In a toilet piping system, the vacuum level should be maintained at 40-55% in the idle position. This ensures proper functioning of the system by preventing any blockages or backflow of waste. Maintaining the correct vacuum level helps in efficient flushing and disposal of waste in the toilet system.

Rate this question:

• 3.

### Is this statement  true or false?In a vacuum toilet system difference in air prossure is used to transport seage from toilets to a vacuum generating unit.

• A.

True

• B.

False

A. True
Explanation
In a vacuum toilet system, the difference in air pressure is indeed used to transport sewage from toilets to a vacuum generating unit. This system relies on creating a lower pressure in the waste pipe compared to the surrounding atmosphere, causing the waste to be sucked into the vacuum system for disposal. Therefore, the statement is true.

Rate this question:

• 4.

### How much air is sucked into the vacuum piping for each time the toilet is flushed?

• A.

10-20 litres

• B.

30-40 litres

• C.

60-80 litres

C. 60-80 litres
Explanation
Each time the toilet is flushed, the vacuum piping system sucks in a significant amount of air to create the necessary pressure for the flushing process. This air is then used to propel the waste and water out of the toilet bowl and into the sewage system. The amount of air sucked in for each flush is estimated to be between 60-80 litres.

Rate this question:

• 5.

### Between flushes sewage and water is collected in ?

• A.

The transport pockets of the piping system

• B.

The grey water interface units

• C.

The sewage treatment plan (STP)

• D.

A collecting tank

A. The transport pockets of the piping system
Explanation
Sewage and water are collected in the transport pockets of the piping system between flushes. This means that when a toilet is flushed, the sewage and water flow through the pipes and are stored in small pockets within the piping system until the next flush. This allows for the effective transport of sewage and water through the plumbing system.

Rate this question:

• 6.

### Each time a vacuum toilet is flushed; what happens to the vacuum level in the piping system?

• A.

The vacuum level in the piping system will increase

• B.

The vacuum level in the piping system will decrease and the vacuum generating unit will start to re-build the vacuum level

• C.

The vacuum level will remain unchanged in a correctly installed piping system

B. The vacuum level in the piping system will decrease and the vacuum generating unit will start to re-build the vacuum level
Explanation
When a vacuum toilet is flushed, it creates a suction force that reduces the vacuum level in the piping system. This decrease in vacuum level triggers the vacuum generating unit to start re-building the vacuum level by removing air from the system. Therefore, the correct answer is that the vacuum level in the piping system will decrease and the vacuum generating unit will start to re-build the vacuum level.

Rate this question:

• 7.

### How far in the piping system will the seage move for each time a toilet is flushed?

• A.

Alle the way from the toilet to the STP or collecting tank

• B.

20-30 meters

• C.

5 to 15 meters

C. 5 to 15 meters
Explanation
The correct answer is 5 to 15 meters. When a toilet is flushed, the sewage is pushed through the piping system by the force of the water. This force allows the sewage to travel a certain distance before it reaches a point where it needs to be collected or treated, such as a sewage treatment plant (STP) or a collecting tank. The distance that the sewage can travel depends on factors such as the size and slope of the pipes, the water pressure, and any obstacles or bends in the system.

Rate this question:

• 8.

### Where in a vacuum system should the vacuum generating unit (VacuumaratorTM pump) be located?

• A.

At the highest point of the vacuum system

• B.

At the lowest point

• C.

At the same height as the toilets in the system

B. At the lowest point
Explanation
The vacuum generating unit should be located at the lowest point in a vacuum system. This is because the vacuum generating unit creates the necessary suction to remove waste from the toilets and transport it through the system. Placing it at the lowest point allows for efficient removal of waste and prevents any potential blockages or backups in the system.

Rate this question:

• 9.

### What is meant by the expression "Backflow"?

• A.

Sewage is flowing from the toilet to the vacuum generating unit

• B.

Sewage is flowing form the vacuum generating unit to the collecting tank

• C.

Sewage from upper pipes flowing back to the rising pipe connected to the toilet

C. Sewage from upper pipes flowing back to the rising pipe connected to the toilet
Explanation
The expression "Backflow" refers to the situation where sewage from upper pipes flows in the opposite direction, back into the rising pipe that is connected to the toilet. This can occur when there is a reversal of the normal flow due to a change in pressure or a malfunction in the plumbing system.

Rate this question:

• 10.

### What other subjects should be considered when installing a vacuum piping system?

• A.

The size of the ship and the risk of varying trim and list of the ship

• B.

The speed of the ship

• C.

The waters in which the ship is designed to travel

• D.

The outside temperature

A. The size of the ship and the risk of varying trim and list of the ship
Explanation
When installing a vacuum piping system, the size of the ship and the risk of varying trim and list of the ship should be considered. This is because the size of the ship will determine the size and capacity of the piping system needed. Additionally, the risk of varying trim and list of the ship is important to consider as it can affect the proper functioning and efficiency of the vacuum system.

Rate this question:

• 11.

### What should be considered when installing a vacuum piping system in a ship where the totale pipe volume is less than 160 litres?

• A.

To make the dimension of the pipes as big as possible

• B.

To install bigger VacuumaratorTM pumps

• C.

To install a vacuum accumulating tank

C. To install a vacuum accumulating tank
Explanation
When installing a vacuum piping system in a ship with a total pipe volume of less than 160 litres, it is important to consider installing a vacuum accumulating tank. This tank helps to collect and store the vacuum pressure, ensuring a consistent and reliable vacuum supply throughout the system. Without the tank, the system may experience fluctuations in vacuum pressure, leading to inefficiencies and potential malfunctions. Therefore, installing a vacuum accumulating tank is crucial for maintaining a stable and efficient vacuum piping system in this scenario.

Rate this question:

• 12.

### What is a "rodding point"?

• A.

A point in a vacuum piping system where access to the piping is gained for cleaning

• B.

A point where the pipining system is at its highest point

• C.

A point where the pipining system is at its lowest point

A. A point in a vacuum piping system where access to the piping is gained for cleaning
Explanation
A "rodding point" refers to a specific location in a vacuum piping system that allows for easy access to the piping in order to clean it. This point is designed to facilitate maintenance and ensure that the system remains free from any blockages or obstructions.

Rate this question:

• 13.

### Why should transport pockets be installed in a vacuum piping system?

• A.

To prevent backflow to the toilets

• B.

To make cleaning of the piping system possible

• C.

To re-form slugs and thus secure the speed of the transport of sewage in the piping

C. To re-form slugs and thus secure the speed of the transport of sewage in the piping
Explanation
Transport pockets should be installed in a vacuum piping system to re-form slugs and secure the speed of sewage transport in the piping. Slugs are large volumes of sewage that are transported through the vacuum system. By re-forming slugs, the system ensures that the sewage is transported efficiently and quickly, preventing any blockages or delays in the system. This helps maintain the overall speed and effectiveness of the sewage transport process.

Rate this question:

Quiz Review Timeline +

Our quizzes are rigorously reviewed, monitored and continuously updated by our expert board to maintain accuracy, relevance, and timeliness.

• Current Version
• Aug 22, 2023
Quiz Edited by
ProProfs Editorial Team
• Sep 25, 2014
Quiz Created by
Jets1