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Proposed Test Protocol for Calculating the Energy Efficiency of Internal Ac-Dc Power Supplies


Quiz Questions

1. Devices designed to convert ac voltage into dc voltage for the purpose of powering electrical equipment is called __________________.
Ac-Dc Power Supply
Current Supply
2. AC signal is a time-varying signal whose polarity varies with a period of time T and whose average value is zero.
True
False
3.Apparent power is also called __________________.
Total Power
Circuit Power
4.A signal of which the polarity and amplitude do not vary with time is called DC signal.
True
False
5.What is UUT mean?
Unit Under Test
Under Unit Test
Unit Under Temperature
None of the above
6.A power supply designed to provide one dc voltage level or bus is called Multiple Output Power supply.
True
False
7._____________________ is a power supply whose components are grouped on a single printed circuit board but are not enclosed in a case.
Open Frame Modular Internal Power Supply
Multiple Frame Modular Internal Power Supply
8.Any of the dc outputs of the power supply, to which loads can be connected and current and power supplied is called Output Voltage Bus.
True
Flase
9.____________ is the ratio of the active, or real, power (P) consumed in watts to the apparent power (S) drawn in volt-amperes.
True power factor
Current supply factor
10.The ___________________ is defined as the ratio of peak current to rms current (or peak voltage to rms voltage).
Crest factor
Displacement factor
11.The supply voltage declared by the manufacturer in the specification of the power supply is called Rated Dc input voltage.
True
False
12.The dc output current range (minimum/maximum) for each output voltage bus of the power supply as declared by the manufacturer in the specification of the power supply.
True
False
13.The square root of the average of the square of the value of the function taken throughout the period is called __________________.
Root Mean Square
Output Mean Square
14.Standby mode represents the mode during which all dc power is delivered through the standby voltage rail of the power supply.
True
False
15.The ___________________ is the output voltage bus that is present whenever ac power is applied to the ac inputs of the supply.
Standby voltage rail
Power Voltage
16.The operating condition of a system wherein the observed variable has reached an equilibrium condition in response to an input or other stimulus in accordance with the definition of the system transfer function is known as a Steady state.
True
False

17.What does THD stand for?
Total Harmonic Distortion
Total Harmonic Displacement
Temperature Harmonic Distortion
None of the above
18.The ratio, expressed as a percentage, of the total real output power (produced by a conversion process) to the real power input required to produce it is called ________________.
Efficiency
Total Current supply
19.The maximum difference between rms phase to neutral or phase-to-phase voltage amplitudes at the UUT input terminals is called Rated Input Frequency.
True
False
20.Active dc loads such as electronic loads or passive dc loads such as rheostats used for efficiency testing of the UUT shall be able to maintain the required current loading set point for each output voltage within an accuracy of ± 0.5%.
True
False