2-4-3
In a self-contained meter, the entire current passes through the ? . a.disk b.meter c.secondary coil d.voltage coil
B. Meter
A residential meter is rated for a certain ? of expected load. a.average span b.peak c.range d.voltage
C. Range
A meter that measures demand and is independent of the kWH assembly is a ? meter. a.demand b.mechanical c.primary d.thermal
D. Thermal
A mechanical demand meter is controlled by the accuracy of the basic watt-hour meter. Select one: True False
True
Dropping or picking up a load at 480/277 is dangerous because of very high available fault current at these voltages. Select one: True False
True
Time-of-use customers are beneficial to the electrical provider because they use generation that would otherwise be underutilized. Select one: True False
True
A minimum of ? voltage checks should be made prior to setting a residential meter. a.5 b.6 c.7 d.8
d.8
The meters most commonly used for demand metering are ? and ? . a.kW / kVA b.mechanical / electronic c.thermal / electronic d.thermal / mechanical
d.thermal / mechanical
A self-contained meter has no limits as to the type of service it can be used on. Select one: True False
False
It is acceptable to install a 480-volt meter in a live base as long as voltage checks are made. Select one: True False
False
Voltage checks are not required if the customer's main breaker on a residence is opened. Select one: True False
False
The general rule of thumb for meter elements is to have ? fewer element(s) than the number of wires in the service to be measured. a.1 b.2 c.3 d.4
a.1
The two main types of meter construction are electromechanical and ? . a.electronic b.Kh constant c.self-contained d.transformer rated
a.electronic
A transformer rated meter normally reduces the voltage and current to ? and ? for metering purposes. a.10 V / 5 A b.120 V / 5 A c.240 V / 10 A d.277 V / 10 A
b.120 V / 5 A
The aluminum meter disk of a single-phase meter disk turns because of ? . a.a gear train b.eddy currents c.magnetic flux d.the permanent magnet
b.eddy currents
A meter that is connected by a set of gears to the register is the ? meter. a.average demand b.electromechanical c.electronic d.peak demand
b.electromechanical
The type of meter that can check the voltage and current in each phase is a(n) ? meter. a.electromagnetic b.electronic c.poly-phase d.single-phase
b.electronic
A customer with a(n) ? power agreement has to cut back his or her power demand when asked to do so. a.demand b.interruptible c.large d.small
b.interruptible
The Kh constant of a meter relates to the ? of ? to the load being registered. a.current / service wires b.number / disk rotations c.number / meter coils d.voltage / the secondary
b.number / disk rotations
Primary metering uses ? and ? to meter a customer. a.CTs / current transformers b.CTs / MTs c.CTs / PTs d.PTs / meter coils
c.CTs / PTs
On a 120/240-volt service being served by a self-contained meter, the voltage coil of the meter is connected from ? . a.L1 to L2 b.S1 to N c.S1 to S2 d.S2 to N
c.S1 to S2
Real power is measured in ? . a.kVA b.kVAR c.kW d.kWHA
c.kW
Power factor is the ratio between ? and ? . a.kVAR peak / kVA peak b.kW peak / kVA c.kW peak / kVA peak d.kW peak / kVAR peak
c.kW peak / kVA peak
There are three kinds of electrical power: real, apparent, and ? . a.average b.peak c.reactive d.resistive
c.reactive
The Kr constant of a meter regulates the ? . a.current flow through the meter b.speed of the disk c.speed of the register d.voltage flow through the meter
c.speed of the register
