Rural Water Flashcards
What is the primary concern with shallow wells or ponds?
Easily contaminated
Shallow water sources are more susceptible to pollution from surface runoff and other environmental factors.
What depth defines shallow ground water systems?
Less than 25 feet deep
Shallow ground water systems are typically more vulnerable to contamination.
What type of wells are identified by logs and are driven?
Driven wells
Driven wells are shallow and installed using specialized equipment.
What is the typical diameter range for drilled wells?
4 to 6 inches
This size range is standard for many residential and commercial applications.
What must slabs with a well head do?
Grade away from well head
Proper grading helps prevent surface water from flowing into the well.
What has been a requirement for wells in British Columbia since 2005?
Well capacity, ground makeup, audiology type
These requirements contribute to the sustainable management of water resources.
What type of pumps uses spinning impellers?
Centrifugal pumps
These pumps are commonly used for their efficiency in moving water.
What does the volute in a centrifugal pump do?
Reduces velocity and builds pressure
The volute is designed to convert kinetic energy into pressure energy.
What is the theoretical pressure range for centrifugal pumps?
1-4 psi to 34 psi
Actual performance can vary based on design and application.
What type of pump typically has a motor at the bottom?
Submersible pumps
These pumps are designed to operate underwater, providing effective water lifting.
What is the common configuration for single-phase motors?
Permanent split capacitor (PSC)
PSC motors are widely used for their efficiency and reliability.
Fill in the blank: The motor on a submersible pump adds about ______ psi.
10 psi
This pressure boost is crucial for effective water delivery.
True or False: Centrifugal pumps are the only type of pumps used for deep water applications.
False
Deep water jet pumps and other types may also be utilized.
What type of motors are often used in industrial/commercial applications?
Three-phase motors
These motors are preferred for their power and efficiency in larger systems.
What is a common issue with positive displacement pumps?
Noisy and expensive
While effective, these pumps may not be suitable for all applications due to noise and cost.
What is the recommended maximum number of times per hour for submersible pumps?
25 times per hour
What type of control box can submersible pumps have?
Ground mounted control box containing start capacitor, relay, and protection components
What color is the ground wire in submersible pumps?
Green
How many black wires do Z wire pumps have?
Two black wires
What types of pump types are mentioned?
- CSIR
- SCR types
What is a VFD?
An electric device that controls the speed of a motor by varying the frequency of the power supply
What is the significance of a check valve on submersible pumps?
Should be set to 25 psi and below drawdown
What material is the most popular for pipes mentioned?
Polyethylene
What is the maximum depth for certain pumps in Bra65?
600 feet
What is required for all plastic pipes?
Torque arresters
What should be considered when selecting well components?
- Well size
- Depth
- Yield
What is the formula for calculating Total Dynamic Head (TDH)?
TDH = vertical lift + horizontal pipe length + pipe diameter friction loss
What is the suggested minimum yield for wells?
6 GPM per well/spring
What is the average water requirement per person per day?
50 - 100 gallons water/person/day
Fill in the blank: Peak demand can be calculated using _______.
tables
True or False: VED pumps need pressure switches.
False
What components are used for pressure control in pumps?
- Pressure switches
- Transducers
What should be considered when checking the pressure supply available to pump?
Pressure supply available to pump
What is the peak demand calculation based on?
Household count and peak flow rate
What is the primary function of a high-volume press in relation to V FL Rumps?
To dampen sudden pressure surges
This is important for maintaining system stability.
What are specific PIES HANKS available for?
For V.D pumps
These are specialized components for certain types of pumps.
What factors are included in calculating Suction Head?
Suction (701 + friction loss)
This calculation is crucial for pump performance.
What is the purpose of the discharge head in a pump system?
To relieve pressure from the pump to the storage tank
This helps in managing the flow and pressure in the system.
What is the recommended minimum velocity for a water flow in a pumping system?
A minimum velocity to avoid issues
This ensures efficient operation and prevents sedimentation.
How much will a single-phase pump motor consume during operation?
6, holmalfouet
‘Holmalfouet’ seems to be a typographical error.
How do you size the pref tank for a pump?
It must accommodate 1 minute of startup at the pump running ‘gpm rate’
This is essential for preventing cavitation and ensuring smooth operation.
What should the valve be positioned at relative to the pump level?
At least 3° under the pump level
This positioning helps maintain proper flow dynamics.
What is the minimum requirement for a submersible pump?
Needs to be at least 2 feet below the surface
This ensures proper operation and prevents air intake.
What factors should be verified for a water pump based on nameplate data?
- Hp
- Voltage
- Phase
- Hertz
These specifications are critical for compatibility and performance.
What is the recommended distance between the pump and the electrical panel?
Should not exceed 90 meters
This distance helps minimize electrical losses.
What type of switch should be wired in for a pump system?
A disconnect switch
This is important for safety and maintenance.
What is an inducer sleeve used for in a pump system?
To speed up water flow
This is particularly useful if the well is too large to accommodate minimum cooling velocity.
What type of pumps require a control box switch?
Double pole single throw
This type of switch is necessary for controlling the pump’s power supply.
