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Basic Electricity > All ASA Questions > Flashcards

All ASA Questions Flashcards

1
Q

The working voltage of a capacitor in an AC circuit should be…

A

At least 50% greater than the highest applied voltage.

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2
Q

The purpose of providing a space underneath the plates in a lead acid battery’s cell container is to…

A

prevent sediment buildup from contracting the plates and causing a short circuit.

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3
Q

A 24-volt source is required to furnish 48 watts to a parallel circuit consisting of two resistors of equal value. What is he value of each resistor? (Note: R( t ) = E^2/P)

A

24 ohms

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4
Q

The control valve switch must be placed in the neutral position when the landing gears are down to…

A

Prevent the warning horn from sounding when the throttles are closed.

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5
Q

When more than two inductors of different inductances are connected in parallel in a circuit, the total inductance is…

A

less than the inductance of the lowest rated inductor.

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6
Q

Which of the following best describes the contributing factors to thermal runaway in a nickel-cadmium battery installed in an aircraft?

A

Low internal resistance intensified by high cell temperatures and a high current discharge/charge rate in a constant potential (voltage) charging system.

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7
Q

When the landing gears are up and the throttles are retarded, the warning horn will not sound if an open occurs in wire..

A

No. 4

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8
Q

A 12-volt electric motor has 1,000 watts input and a 1 horsepower output. Maintaining the same efficiency, how much input power will a 24 volt, 1 horsepower electric motor require?

A

1,000 watts.

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9
Q

In an AC circuit, the effective voltage is…

A

less than the maximum instantaneous voltage.

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10
Q

What happens to the current in a voltage step-up transformer with a ratio of 1 to 4?

A

The current is stepped down by a 1 to 4 ratio.

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11
Q

What unit is used to express electrical power?

A

Watt.

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12
Q

When inductors are connected in series in a circuit, the total inductance is… (where the magnetic fields of each inductor do not affect the others) (Note: L( t ) = L( 1 ) + L ( 2 ) + L ( 3 ) . . . . . )

A

Equal to the sum of the individual inductances.

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13
Q

If an internally broken resistor is disconnected at the terminal just before said resistor, what will the ohmmeter read?

A

Infinite Resistance.

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14
Q

The voltage drop in a circuit of known resistance is dependent on…

A

the amperage of the circuit.

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15
Q

Which of the following logic gates will provide an active high out only when all inputs are different?

A

XOR.

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16
Q

If electrolyte from a lead-acid battery is spilled in the battery compartment, which procedure should be followed?

A

Apply SODIUM BICARBONATE solution to the affected area followed by a water rinse.

17
Q

(Refer to figure 14.) The total resistance of the circuit is…

A

17 ohms.

18
Q

(Refer to figure 13.) Determine the total current flow in the circuit.

A

1.4 ampere.

19
Q

(Refer to figure 8.) With an ohmmeter connected to the circuit as shown, what will the ohmmeter read?

A

10 ohms.

20
Q

In a P-N-P transistor application, the solid state device is turned on when the…

A

base is negative with respect to the emitter.

21
Q

Which of the following statements is/are generally true regarding the charging of several aircraft batteries together?

  1. Batteries of different voltages (but similar capacities) can be connected in series with each other across the charger, and charged using the constant current method.
  2. Batteries of different ampere-hour capacity and same voltage can be connected in parallel with each other across the charger, and charged using the constant voltage method.
  3. Batteries of the same voltage and same ampere-hour capacity must be connected in series with each other across the charger, and charged using the constant current method.
A

1 and 2.

22
Q

How can the state-of-charge of a nickel-cadmium battery be determined?

A

By a measured discharge.

23
Q

Diodes are used in electrical power supply circuits primarily as…

A

rectifiers.

24
Q

A lead-acid battery with 12 cells connected in series (no-load voltage = 2.1 volts per cell) furnishes 10 amperes to a load of 2-ohms resistance. The internal resistance of the battery in this instance is…

A

0.52 ohm.

25
Q

The electrolyte of a nickel-cadmium battery is the lowest when the battery is…

A

in a discharged condition.

26
Q

Through which material will magnetic lines of force pass the most readily?

A

Iron.

27
Q

A fully charged lead-acid battery will not freeze until extremely low temperatures are reached because…

A

most of the acid is in the solution.

28
Q

What determines the amount of current which will flow through a battery while it is being charged by a constant voltage source?

A

The state-of-charge of the battery.

29
Q

The method used to rapidly charge a nickel-cadmium battery utilizes…

A

constant voltage and varying current.

Basic Electricity (1 decks)

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