Water Meters

Question 1

device that assists in the installation of small meters and helps protect them
-holds the stub ends in proper alignment and maintains proper spacing for support

Answer 1

meter yoke

Question 2

most commonly installed water meter and used primarily for residential metering

Answer 2

positive displacement meter

Question 3

combination of two meters (positive and turbine) designed to accurately measure flow over a wide range

Answer 3

compound meter

Question 4

propeller or turbine type meter used to meter water going to large industrial customers that take large volumes of water

Answer 4

current meter

Question 5

used in applications where daily use is low, but an emergency condition may require high flow rates

Answer 5

detector check meter

Question 6

flowing water turns a rotor that is recorded on the meters register; revolutions are almost directly proportional to volume of flow
-used in large flow applications `

Answer 6

turbine meter

Question 7

uses a multiblade rotor that is mounted on a spindle within the cylindrical measuring chamber

Answer 7

multijet meter

Question 8

flowing water causes a propeller to rotate and movement is transmitted to the register to record the flow volume
-used when flow is consistent and does not change abruptyl

Answer 8

propeller meter

Question 9

has a restriction in the pipe that requires a portion of the flow to go through a meter and be recorded
-used in large flow applications

Answer 9

proportional meter

Question 10

a tapered constriction in the pipeline that creates a pressure differential that changes depending on the rate of flow through it

Answer 10

venturi meter

Question 11

thin plate that restricts flow though the system and creates a differential pressure on each side of the plate

Answer 11

orifice meter

Question 12

utilizes a magnetic field to measure flow based on the principle that relative motion between a conductor and a magnetic field will induce a voltage

Answer 12

magnetic meter

Question 13

uses sound waves to measure flow by utilizing the Doppler effect

Answer 13

ultrasonic meter

Question 14

what are the two most common types of positive displacement meters

Answer 14

1) piston

2) nutating-disc `

Question 15

what meters are best for high volume/flow requirements?

Answer 15

1) compound meter
2) current meter
3) detector check meter

Question 16

commonly called velocity meters and usually installed on water lines 3in or more in diameter

Answer 16

current meter

Question 17

what are the three main types of current meters?

Answer 17

1) turbine
2) multijet
3) propeller

Question 18

Type of current meter used when flow is consistent and does not change abrupty

Answer 18

propeller meter

Question 19

water causes a rotor to rotate within a measuring chamber

• type of meter best suited for high flow applications
• very little friction loss
• will under register if sediment accumulates on blades

Answer 19

turbine meter

Question 20

multiblade rotor mounted on spindle within cylindrical measuring chamber

• clogged meter will over register
• worn meter will under register

Answer 20

multijet meter

Question 21

water causes propeller to rotate

-used when flow is fairly consistent and does not change abruptly

Answer 21

propeller meter