Question 1

&#160;____________causes hoop tension in pipe shell.&#10;A)internal water pressure&#10;B)external water pressure&#10;C)water hammer&#10;D)longitudinal stress

Accepted Answer

Internal water pressure causes hoop tension in a pipe shell, as it exerts a force radially outward, which puts the material of the pipe under tension circumferentially.

Question 2

Which of the following stress in pipe depends on temperature?&#10;A)internal water pressure&#10;B)stress due to foundation reaction&#10;C)longitudinal stress&#10;D)temperature stress

Accepted Answer

Temperature stress in pipes is directly related to changes in temperature. When a pipe experiences a change in temperature, it can expand or contract, leading to stress within the material. This is distinct from stresses caused by internal pressure, external forces, or reactions from the foundation, which are not directly dependent on temperature changes.

Question 3

Pipe corrosion can be minimized by&#10;A)removal of copper sulfate&#10;B)addition of calcium carbonate&#10;C)addition of carbon dioxide&#10;D)removal of dissolved oxygen

Accepted Answer

Removing dissolved oxygen from water systems reduces the rate of corrosion, as oxygen is a key reactant in the corrosion process.

Question 4

How many types of pumps are present?&#10;A)1&#10;B)2&#10;C)3&#10;D)4

Accepted Answer

There are two primary types of pumps: Positive Displacement Pumps and Dynamic (Centrifugal) Pumps.

Question 5

Submersible pumps require high maintenance.

Accepted Answer

Submersible pumps are designed to work underwater, making them less prone to some of the issues that affect external pumps, such as leaks and environmental damage, which generally results in lower maintenance requirements.

Question 6

What is the minimum diameter of pipes used for drainage of waste water?&#10;A)50 mm&#10;B)75 mm&#10;C)100 mm&#10;D)105 mm

Accepted Answer

The answer of What is the minimum diameter of pipes...

Question 7

What is the wastewater from kitchen sinks called?&#10;A)grey water&#10;B)black water&#10;C)yellow water&#10;D)brown water

Accepted Answer

Wastewater from kitchen sinks, as well as showers, baths, and washing machines, is classified as grey water. It is relatively clean compared to black water, which contains human waste.

Question 8

What is the water from urinals called?&#10;A)black water&#10;B)yellow water&#10;C)grey water&#10;D)brown water

Accepted Answer

Black water is the term used for wastewater that contains fecal matter and urine, which is what water from urinals would contain.

Question 9

What is the minimum diameter of the pipe used to collect black water?&#10;A)50 mm&#10;B)75 mm&#10;C)100 mm&#10;D)125 mm

Accepted Answer

The minimum diameter of the pipe used to collect black water is 100 mm. This size ensures adequate flow and prevents blockages in the sewage system.

Question 10

What is the recommended slope ratio for soil water pipes?&#10;A)1:12&#10;B)1:20&#10;C)1:30&#10;D)1:40

Accepted Answer

The answer of What is the recommended slope ratio for...

Question 11

Grease should not be allowed to enter the normal drainage system.

Accepted Answer

The answer of Grease should not be allowed to enter...

Question 12

&#160;____________is used to clean blockage in the line.&#10;A)lateral chamber&#10;B)main chamber&#10;C)inspection chamber&#10;D)sewer chamber

Accepted Answer

The answer of &#160;____________is used to clean blockage in the...

Question 13

What is the shape of the septic tank?&#10;A)square&#10;B)rectangle&#10;C)circular&#10;D)oval

Accepted Answer

The answer of What is the shape of the septic...

Question 14

What is the percentage of purification of septic tank effluent?&#10;A)30%&#10;B)50%&#10;C)70%&#10;D)90%

Accepted Answer

The answer of What is the percentage of purification of...

Question 15

____________should not be placed near water body.&#10;A)power generator&#10;B)soak pit&#10;C)pump stations&#10;D)houses

Accepted Answer

The answer of ____________should not be placed near water body.&#10;A)power...

Deck 8: Pipe and Pump