EEE 334 – Lab 2 Metering Overview |
Complete Study Material.
An "A" base meter has terminals located on the backside of the meter.
Answer>>>: : False (A-base terminals are on the bottom)
S or "Socket" type meters are on the back side of the meter.
Answer>>>: : True
The resistor is the part of a watt-hour meter that introduces a retarding effect on
the disk.
Answer>>>: : False (Retarding magnet introduces retarding effect)
The basic principles of operation of the electro-mechanical watt-hour meter
introduced around 1900 are completely different from those of today's electro-
mechanical meters.
Answer>>>: : False
The interaction of the current and potential coil fluxes and the induced eddy
current fluxes in a meter disk produce disk rotation.
Answer>>>: : True
The designation of "CL 100" on a meter nameplate indicates that the meter is
transformer rated and will have instrument transformers associated with it.
Answer>>>: : False
The voltage rating on a meter nameplate indicates the voltage rating of the
meter's potential coil or coils.
Answer>>>: : True
Page 1 of 38
,EEE 334 – Lab 2 Metering Overview |
Complete Study Material.
The rating in volts of a meter's current coils is called its Class.
Answer>>>: : False (It is called Voltage rating)
All poly-phase meters have two or more stators.
Answer>>>: : True
The test switch used in conjunction with a transformer-rated meter is used to
de-energize the customer's loads while the meter is being tested.
Answer>>>: : False (It isolates the meter but does not affect customer
load)
Transformer-rated meters are used when voltage and/or current exceeds the
ratings of self-contained meters.
Answer>>>: : True
When a comparison test is made on a watt-hour meter, the currents through the
meter, the test standard, and the phantom load are all the same.
Answer>>>: : True
Since company meter seals that have been tampered with can usually be
discovered visually, it is not necessary to pull on a seal to see if it is in its proper
condition.
Answer>>>: : False
Multiple Choice / Select All That Apply Questions
Page 2 of 38
,EEE 334 – Lab 2 Metering Overview |
Complete Study Material.
Which of the following are the basic parts of a watt-hour meter?
Answer>>>: :
COVER
BASE
STATOR
RETARDING MAGNET
ROTOR ASSEMBLY or DISK
REGISTER
Which of the following are types of watt-hour meter bases?
Answer>>>: :
"S" type
"A" type
Page 3 of 38
, EEE 334 – Lab 2 Metering Overview |
Complete Study Material.
When the voltage requirements of a customer exceed the rating of a self-
contained meter, which instrument transformers are needed in conjunction with
a transformer-rated meter?
Answer>>>: :
Voltage transformers "VT's"
Current transformers "CT's"
Which of the following is an example of a self-contained meter class?
Answer>>>: : Class 200
As-found accuracy tests on self-contained meters are typically made at what two
power levels?
Answer>>>: :
Light load, or 10% of rated test amps
Full load, or rated test amps
Which of the following is used in comparison testing to supply a regulated
current during the test?
Answer>>>: : A phantom load
Page 4 of 38
Complete Study Material.
An "A" base meter has terminals located on the backside of the meter.
Answer>>>: : False (A-base terminals are on the bottom)
S or "Socket" type meters are on the back side of the meter.
Answer>>>: : True
The resistor is the part of a watt-hour meter that introduces a retarding effect on
the disk.
Answer>>>: : False (Retarding magnet introduces retarding effect)
The basic principles of operation of the electro-mechanical watt-hour meter
introduced around 1900 are completely different from those of today's electro-
mechanical meters.
Answer>>>: : False
The interaction of the current and potential coil fluxes and the induced eddy
current fluxes in a meter disk produce disk rotation.
Answer>>>: : True
The designation of "CL 100" on a meter nameplate indicates that the meter is
transformer rated and will have instrument transformers associated with it.
Answer>>>: : False
The voltage rating on a meter nameplate indicates the voltage rating of the
meter's potential coil or coils.
Answer>>>: : True
Page 1 of 38
,EEE 334 – Lab 2 Metering Overview |
Complete Study Material.
The rating in volts of a meter's current coils is called its Class.
Answer>>>: : False (It is called Voltage rating)
All poly-phase meters have two or more stators.
Answer>>>: : True
The test switch used in conjunction with a transformer-rated meter is used to
de-energize the customer's loads while the meter is being tested.
Answer>>>: : False (It isolates the meter but does not affect customer
load)
Transformer-rated meters are used when voltage and/or current exceeds the
ratings of self-contained meters.
Answer>>>: : True
When a comparison test is made on a watt-hour meter, the currents through the
meter, the test standard, and the phantom load are all the same.
Answer>>>: : True
Since company meter seals that have been tampered with can usually be
discovered visually, it is not necessary to pull on a seal to see if it is in its proper
condition.
Answer>>>: : False
Multiple Choice / Select All That Apply Questions
Page 2 of 38
,EEE 334 – Lab 2 Metering Overview |
Complete Study Material.
Which of the following are the basic parts of a watt-hour meter?
Answer>>>: :
COVER
BASE
STATOR
RETARDING MAGNET
ROTOR ASSEMBLY or DISK
REGISTER
Which of the following are types of watt-hour meter bases?
Answer>>>: :
"S" type
"A" type
Page 3 of 38
, EEE 334 – Lab 2 Metering Overview |
Complete Study Material.
When the voltage requirements of a customer exceed the rating of a self-
contained meter, which instrument transformers are needed in conjunction with
a transformer-rated meter?
Answer>>>: :
Voltage transformers "VT's"
Current transformers "CT's"
Which of the following is an example of a self-contained meter class?
Answer>>>: : Class 200
As-found accuracy tests on self-contained meters are typically made at what two
power levels?
Answer>>>: :
Light load, or 10% of rated test amps
Full load, or rated test amps
Which of the following is used in comparison testing to supply a regulated
current during the test?
Answer>>>: : A phantom load
Page 4 of 38
