Question 1

Which CWA program controls water pollution by regulating point sources?

Accepted Answer

The National Pollutant Discharge Elimination System (NPDES) is the program under the Clean Water Act (CWA) that controls water pollution by regulating point sources that discharge pollutants into waters of the United States.

Question 2

Which CWA program manages non-point source pollution?

Accepted Answer

The correct choice is A) npsmp, which stands for Nonpoint Source Management Program. This program is specifically designed to manage non-point source pollution, addressing pollution that comes from diffuse sources rather than from a single, identifiable source.

Question 3

The design period of storage reservoir can be given as________

Accepted Answer

The design period of a storage reservoir is typically considered to be 50 years to ensure long-term reliability and sustainability of water supply.

Question 4

Which material is used for pipes which are in contact with milk or product?

Accepted Answer

Stainless steel is widely used for pipes in contact with milk or dairy products due to its corrosion resistance, ease of cleaning, and ability to maintain product purity by not leaching into the product.

Question 5

Which material is used for pipes which conduct water and air?

Accepted Answer

The answer of Which material is used for pipes which...

Question 6

Which material is used for pipes which conduct waste?

Accepted Answer

The answer of Which material is used for pipes which...

Question 7

Which of the following are installed in order to collect product samples hygienically for quality analysis?

Accepted Answer

Sampling devices are specifically designed and installed in systems to collect product samples in a hygienic manner for quality analysis, ensuring that the sample is representative of the product and not contaminated during the sampling process.

Question 8

Which among the following is not a permanent wielding connection?

Accepted Answer

Sampling devices are not considered permanent welding connections because they are typically designed to be removable or detachable for the purpose of taking samples from the flow within a pipeline or system, unlike bends, reducers, and tees which are permanently welded to join or redirect the piping system.

Question 9

Calculate area of a pipe if, flow rate is 20 l/min and flow velocity is 5 cm/s.

Accepted Answer

The area of the pipe can be calculated using the formula for flow rate: $Q = A \times v$, where $Q$ is the flow rate, $A$ is the area, and $v$ is the velocity. First, convert the flow rate from liters per minute to cubic centimeters per second: $20 \, \text{l/min} = 20000 \, \text{cm}^3/\text{min} = \frac{20000}{60} \, \text{cm}^3/\text{s} = 333.33 \, \text{cm}^3/\text{s}$. Then, solve for $A$: $A = \frac{Q}{v} = \frac{333.33 \, \text{cm}^3/\text{s}}{5 \, \text{cm/s}} = 66.66 \, \text{cm}^2$.

Question 10

Which among the following is shut-off and change over valve?

Accepted Answer

Seat valves and butterfly valves can both function as shut-off and change-over valves, allowing for the control of flow direction and the complete stoppage of flow when necessary.

Question 11

To prevent the product flow in the wrong direction which of the following valve is used?

Accepted Answer

Check valves are specifically designed to allow fluid to flow in one direction and automatically prevent backflow (flow in the opposite direction) when the fluid in the line reverses direction.

Question 12

The pipes will expand considerably when the product temperatures are high and during cleaning.

Accepted Answer

Pipes expand when exposed to high temperatures due to the thermal expansion of the material they are made from. This expansion can occur both during the transportation of high-temperature products and during cleaning processes that involve hot water or steam.

Question 13

Valves with constant outlet pressure are used after which of the following machines?

Accepted Answer

The answer of Valves with constant outlet pressure are used...

Question 14

What is the total loss developed in a series of pipes?

Accepted Answer

The total loss developed in a series of pipes is the sum of local losses (due to fittings, bends, valves, etc.) plus the losses in each pipe (due to friction, changes in velocity, etc.).

Question 15

The total head loss for the system is equal to

Accepted Answer

The total head loss in a system is determined by the height difference between the reservoirs, as it represents the energy loss due to friction and other factors as water flows from one reservoir to another.

Question 16

Which among the following is not a loss that is developed in the pipe?

Accepted Answer

The losses developed in a pipe are usually due to factors like entry, exit, and connections between pipes, which cause friction and turbulence. Liquid velocity itself is not a loss but a factor that can influence the magnitude of these losses.

Question 17

How do we determine the total discharge through parallel pipes?

Accepted Answer

The total discharge through parallel pipes is determined by adding the discharge of each individual pipe together. This is because each pipe contributes to the overall flow rate, and their contributions are cumulative.

Question 18

The pipe diameter is________

Accepted Answer

The pipe diameter is directly proportional to the mass flow rate because, for a given fluid velocity, a larger diameter pipe can carry a greater mass of fluid per unit time.

Question 19

Define Viscosity.

Accepted Answer

Viscosity is defined as the resistance to flow of a fluid, which includes both liquids and gases.

Question 20

Coefficient of friction of a laminar flow is

Accepted Answer

The answer of Coefficient of friction of a laminar flow...

Quiz 3: Water and Pipe Regulations