Aviation Knowledge and Competency Examination
Latest 2025/2026 Complete 100 Questions With
Correct Detailed Answers
What is Inductance?-ANSWER-Induced voltage which is
opposite direction of applied voltage
What causes opposition to the flow of applied current in an A.C.
circuit?-ANSWER-Inductive reactance and capacitance
reactance
What represents capacitance in A.C. circuits?-ANSWER-A
capacitor
1|Page
,Why should nickel–cadmium and lead–acid batteries not be
stored or serviced in the same area?-ANSWER-The electrolyte
in nickel–cad batteries is chemically opposite to the lead acid
battery electrolyte and the fumes can contaminate each other.
What is the function of a capacitor?-ANSWER-Serves as a
reservoir or storehouse for electricity
What does an electrical circuit consist of?-ANSWER-1. source of
electrical pressure
2. resistance in the form of energy consuming device
3.conductors in the form of wires to provide electron flow
What is the most important law applicable to the study of
electricity?-ANSWER-Ohm's law
What are the element's of Ohm's law?-ANSWER-1. Voltage
2. current
3. resistance
2|Page
,What unit is used to measure power in D.C. circuits?-ANSWER-
Watts
How many watts equal 1 kilowatt?-ANSWER-1,000 watts
What are the three types of D.C. electrical circuits?-ANSWER-
series, parallel, and series–parallel
What current changes occur in a D.C. circuit when the applied
voltage is increased and the resistance remains constant?-
ANSWER-The current increases
What could cause a nickel–cad battery to fail to deliver its rated
capacity?-ANSWER-Cell imbalance or faulty cells
What are the functions of most multimeters?-ANSWER-Indicate
amperes, volts, or ohms.
What are some advantages of A.C. circuits over D.C. circuits in
aircraft?-ANSWER-AC current can be transmitted over long
distances and more economical than direct current.
3|Page
, Define "impedance"-ANSWER-Total opposition to the flow of
current in an electrical circuit.
How many cells make up a lead–acid battery rated at 24 volts?-
ANSWER-12 cells (2 volts each)
What should be the specific gravity of the electrolyte in a fully
charged lead–acid battery?-ANSWER-Specific gravity between
1.275 and 1.300
What is the effect of temperature on specific gravity of the
electrolyte when checking a lead–acid battery?-ANSWER-
Battery temp changes electrolyte density only when greater
than 90F or less than 70F
Why is a specific gravity check of the electrolyte in a nickel–
cadmium battery not acceptable to determine battery charge?-
ANSWER-There is no appreciable change in the specific gravity
of the electrolyte during charge or discharge.
How is ohm's law expressed as an equation?-ANSWER-Amperes
(I)=Voltage(V)/Resistance(R) or Amps=Voltage divided by
Resistance
4|Page
Latest 2025/2026 Complete 100 Questions With
Correct Detailed Answers
What is Inductance?-ANSWER-Induced voltage which is
opposite direction of applied voltage
What causes opposition to the flow of applied current in an A.C.
circuit?-ANSWER-Inductive reactance and capacitance
reactance
What represents capacitance in A.C. circuits?-ANSWER-A
capacitor
1|Page
,Why should nickel–cadmium and lead–acid batteries not be
stored or serviced in the same area?-ANSWER-The electrolyte
in nickel–cad batteries is chemically opposite to the lead acid
battery electrolyte and the fumes can contaminate each other.
What is the function of a capacitor?-ANSWER-Serves as a
reservoir or storehouse for electricity
What does an electrical circuit consist of?-ANSWER-1. source of
electrical pressure
2. resistance in the form of energy consuming device
3.conductors in the form of wires to provide electron flow
What is the most important law applicable to the study of
electricity?-ANSWER-Ohm's law
What are the element's of Ohm's law?-ANSWER-1. Voltage
2. current
3. resistance
2|Page
,What unit is used to measure power in D.C. circuits?-ANSWER-
Watts
How many watts equal 1 kilowatt?-ANSWER-1,000 watts
What are the three types of D.C. electrical circuits?-ANSWER-
series, parallel, and series–parallel
What current changes occur in a D.C. circuit when the applied
voltage is increased and the resistance remains constant?-
ANSWER-The current increases
What could cause a nickel–cad battery to fail to deliver its rated
capacity?-ANSWER-Cell imbalance or faulty cells
What are the functions of most multimeters?-ANSWER-Indicate
amperes, volts, or ohms.
What are some advantages of A.C. circuits over D.C. circuits in
aircraft?-ANSWER-AC current can be transmitted over long
distances and more economical than direct current.
3|Page
, Define "impedance"-ANSWER-Total opposition to the flow of
current in an electrical circuit.
How many cells make up a lead–acid battery rated at 24 volts?-
ANSWER-12 cells (2 volts each)
What should be the specific gravity of the electrolyte in a fully
charged lead–acid battery?-ANSWER-Specific gravity between
1.275 and 1.300
What is the effect of temperature on specific gravity of the
electrolyte when checking a lead–acid battery?-ANSWER-
Battery temp changes electrolyte density only when greater
than 90F or less than 70F
Why is a specific gravity check of the electrolyte in a nickel–
cadmium battery not acceptable to determine battery charge?-
ANSWER-There is no appreciable change in the specific gravity
of the electrolyte during charge or discharge.
How is ohm's law expressed as an equation?-ANSWER-Amperes
(I)=Voltage(V)/Resistance(R) or Amps=Voltage divided by
Resistance
4|Page
