Aircraft Maintenance and Physics Concepts

Capacitors are sometimes used in dc circuits to

• Counteract inductive reactance at specific locations

• Smooth out slight pulsations in current/voltage

• Assist in stepping voltage and current up and/or down

(refer to figure 11) What would happen to the total current flow if resistance is doubled?

• It would be reduced by 25%

• It would increase by 1mA

• It would be reduced by 50%

Bonding connections should not exceed

• 1 ohm

• 0.1 ohm

• 0.003 ohm

What two devices present a change in direction of current flow in a circuit under fault conditions?

• Differential current protector and fault feeder

• Over excitation and under excitation circuit

• Cut-out relay and reverse current circuit breaker

Which of the following logic gates will provide an active high out with all active high inputs

• NOR

• AND

• OR

Which of the following logic gates will provide a low output when any of the inputs is high?

• NOR

• NAND

• AND

What is the no load voltage on a 6 cell battery capable of supplying 5 amperes?

• 6 volts

• 12 volts

• 10 Volts

When reading a blueprint, a dimension is given as 4.387 inches +0.003 -0.002. Which statement is true?

• The maximum acceptance is 4.390 inches

• The minimum acceptance size is 4.384 inches

• The minimum acceptable size is 4.389 inches

Which of the following is an example of a second class (class B) lever?

• Retractable landing gear

• wheelbarrow

• See-saw

When an aircraft is positioned for weighing on scales located under each landing gear wheel, which of the following may cause erroneous scale readings?

• Gear downlocks installed

• Parking breaks set

• Parking breaks not set