NEIEP 400 FINAL EXAM NEWEST ACTUAL EXAM
2024 QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) ALREADY
GRADED A+ BRAND NEW!
Which is true when placing an ammeter into a circuit ? - ANSWER
>>>>The meter is placed in series with any component
Which of the following describes the most useful feature of the
clamp - on ammeter? - ANSWER >>>>Does not require that
connections be disturbed
Which of the following devices is an example of a reactive
component that can store energy for long periods of time causing
an electrical hazard even with power removed ? - ANSWER
>>>>Capacitor
What must be done when testing a resistance to avoid false
readings caused by parallel circuit paths ? - ANSWER
>>>>Remove one of the two wires to the item being tested
A minus sign in front of a reading of the digital voltmeter indicates
which of the following ? - ANSWER >>>>The positive lead is
connected to the negative source
Which of the following statements best describes CEMF ? -
ANSWER >>>>Opposes the applied voltage .
Refer to the figure . What will be the phase relationship between
the primary and secondary voltages ? - ANSWER >>>>The
secondary voltage will be 180 ° out of phase .
,Which type of transformer would be used to prevent noise from
being fed back to the line without changing the voltage levels ? -
ANSWER >>>>Isolation transformer
What is the power available from a 68 kVA transformer connected
in open delta configuration ? - ANSWER >>>>39.44 kVA
The secondary winding of an 11,000 volt to 220 volt transformer
has 50 windings on the secondary How many turns are on the
primary winding ? - ANSWER >>>>2500 turns
A transformer has 728 turns on the primary winding and 56 turns
on the secondary With 120 volts applied on the primary , what is
the output voltage on the secondary ? - ANSWER >>>>9.23 volts
A transformer has a primary voltage of 440 V with 100 turns and a
15 : 1 voltage ratio of transformation . With a primary current of 25
amps , what is the current in the secondary ? - ANSWER
>>>>375 amps
Which statement best describes eddy currents ? - ANSWER
>>>>They are circulating currents set up by magnetic induction .
With the following values : Ep = 208 VAC ; Es = 35 VAC ; Ip = 3.8
amps ; Is = 21.42 amps , what is the efficiency of this transformer
? - ANSWER >>>>95 %
Which of the following would describe a transformer with a fixed
voltage transformation ratio of 1:12 ? - ANSWER >>>>Step - up
transformer
Which of the following would describe a transformer with a
primary current of 27 amps and a secondary current of 1 amp ? -
ANSWER >>>>Step - down transformer
, Which statement is correct regarding transformers? - ANSWER
>>>>The primary winding terminals are identified with the letter H
Refer to the figure . What type of transformer is represented ? -
ANSWER >>>>Core type with a wye primary and delta secondary
Which would you do to check for an open primary winding ? -
ANSWER >>>>Measure the resistance across the primary
Which statement applies when a secondary winding is completely
shorted ? - ANSWER >>>>Current through the primary is high
Which statement applies when a secondary winding is partially
shorted ? - ANSWER >>>>Current through the secondary is low
Which statement applies when a secondary winding is open ? -
ANSWER >>>>The secondary resistance will be infinity
Which statement applies when a secondary winding is completely
shorted ? - ANSWER >>>>Current through the primary is high
The direction of the magnetic field around a wire when electron
current flows through it can be determined by which of the
following ? - ANSWER >>>>The Left - Hand Rule
Refer to the figure . Which of the following statements is true
regarding the section of wire with current flow as pictured ?
Quesiton Image - ANSWER >>>>The magnetic field around the
conductor would rotate counterclockwise as viewed from the left
end
What is the direction of electron current flow ? - ANSWER
>>>>Negative to positive
2024 QUESTIONS AND CORRECT DETAILED
ANSWERS (VERIFIED ANSWERS) ALREADY
GRADED A+ BRAND NEW!
Which is true when placing an ammeter into a circuit ? - ANSWER
>>>>The meter is placed in series with any component
Which of the following describes the most useful feature of the
clamp - on ammeter? - ANSWER >>>>Does not require that
connections be disturbed
Which of the following devices is an example of a reactive
component that can store energy for long periods of time causing
an electrical hazard even with power removed ? - ANSWER
>>>>Capacitor
What must be done when testing a resistance to avoid false
readings caused by parallel circuit paths ? - ANSWER
>>>>Remove one of the two wires to the item being tested
A minus sign in front of a reading of the digital voltmeter indicates
which of the following ? - ANSWER >>>>The positive lead is
connected to the negative source
Which of the following statements best describes CEMF ? -
ANSWER >>>>Opposes the applied voltage .
Refer to the figure . What will be the phase relationship between
the primary and secondary voltages ? - ANSWER >>>>The
secondary voltage will be 180 ° out of phase .
,Which type of transformer would be used to prevent noise from
being fed back to the line without changing the voltage levels ? -
ANSWER >>>>Isolation transformer
What is the power available from a 68 kVA transformer connected
in open delta configuration ? - ANSWER >>>>39.44 kVA
The secondary winding of an 11,000 volt to 220 volt transformer
has 50 windings on the secondary How many turns are on the
primary winding ? - ANSWER >>>>2500 turns
A transformer has 728 turns on the primary winding and 56 turns
on the secondary With 120 volts applied on the primary , what is
the output voltage on the secondary ? - ANSWER >>>>9.23 volts
A transformer has a primary voltage of 440 V with 100 turns and a
15 : 1 voltage ratio of transformation . With a primary current of 25
amps , what is the current in the secondary ? - ANSWER
>>>>375 amps
Which statement best describes eddy currents ? - ANSWER
>>>>They are circulating currents set up by magnetic induction .
With the following values : Ep = 208 VAC ; Es = 35 VAC ; Ip = 3.8
amps ; Is = 21.42 amps , what is the efficiency of this transformer
? - ANSWER >>>>95 %
Which of the following would describe a transformer with a fixed
voltage transformation ratio of 1:12 ? - ANSWER >>>>Step - up
transformer
Which of the following would describe a transformer with a
primary current of 27 amps and a secondary current of 1 amp ? -
ANSWER >>>>Step - down transformer
, Which statement is correct regarding transformers? - ANSWER
>>>>The primary winding terminals are identified with the letter H
Refer to the figure . What type of transformer is represented ? -
ANSWER >>>>Core type with a wye primary and delta secondary
Which would you do to check for an open primary winding ? -
ANSWER >>>>Measure the resistance across the primary
Which statement applies when a secondary winding is completely
shorted ? - ANSWER >>>>Current through the primary is high
Which statement applies when a secondary winding is partially
shorted ? - ANSWER >>>>Current through the secondary is low
Which statement applies when a secondary winding is open ? -
ANSWER >>>>The secondary resistance will be infinity
Which statement applies when a secondary winding is completely
shorted ? - ANSWER >>>>Current through the primary is high
The direction of the magnetic field around a wire when electron
current flows through it can be determined by which of the
following ? - ANSWER >>>>The Left - Hand Rule
Refer to the figure . Which of the following statements is true
regarding the section of wire with current flow as pictured ?
Quesiton Image - ANSWER >>>>The magnetic field around the
conductor would rotate counterclockwise as viewed from the left
end
What is the direction of electron current flow ? - ANSWER
>>>>Negative to positive
