SYSTEMS 1, MOTORS, ELECTRICAL SYSTEMS, NAV LIGHTS 2027 UPDATE WITH COMPLETE SOLUTIONS

SYSTEMS 1, MOTORS, ELECTRICAL SYSTEMS, NAV LIGHTS 2027
UPDATE WITH COMPLETE SOLUTIONS

Question 1.
How do the starting load characteristics of a cumulative compound motor compare to
other DC motors?

Correct Answer: Starting torque and speed control fall between a series and
shunt wound motor


Question 2.
What advantage do AC motors have over DC motors? (3 part question)

Correct Answer: 1. AC motors are generally less expensive than comparable DC
Motors 2. Very little maintenance is required on AC Motors 3. AC motors are well
suited for constant speed applications


Question 3.
In a DC motor why is solid iron not used for the armature core?

Correct Answer: To prevent heat build-up and the use of energy needlessly.


Question 4.
How can speed be

Correct Answer: controlled on a DC motor? By varying current in the field
windings


Question 5.
What determines AC Motor?

Correct Answer: the speed of rotation of an 1. AC frequency 2. Number of poles


Question 6.
What are the 2 types of AC motors generally used on aircraft

Correct Answer: 1. Synchronous 2. Induction


Question 7.
What is the primary advantage of using a capacitor start with a single phase induction
motor?

Correct Answer: High starting torque

, Question 8.
Where are universal motors generally used

Correct Answer: Nowhere in aviation


Question 9.
A direct current motor is

Correct Answer: A rotating machine that transforms DC energy into mechanical
energy


Question 10.
3 basic types of DC motors

Correct Answer: 1. Series 2. Shunt 3. Compound


Question 11.
What is the series tage

Correct Answer: DC motors principal advan- High starting torque


Question 12.
How are AC motors rated

Correct Answer: 1. Horsepower output 2. Number of phases and frequency 3.
Full load current


Question 13.
What is the purpose of the "shaded pole" in the single phase induction motor?

Correct Answer: Makes it self starting


Question 14.
What is the temperature thumb

Correct Answer: limiting factor rule of A temperature too hot for the hand is too
high for safety


Question 15.
How is the rotor of an induction motor constructed

Correct Answer: An iron core with heavy copper or aluminum bars embedded