Day 4 Progress Check Flashcards
What is the primary purpose of a capacitor in a capacitor start motor?
To throw the start winding current out of phase with the run winding current
Which type of motor requires a starter winding to operate?
Single-phase motor
What principle does an induction motor operate on?
Rotating magnetic field inducing current in the armature
What is the primary advantage of solenoid valves over motor-actuated valves?
They are simpler and less expensive
Which of the following motors can operate on both AC and DC power?
Universal motor
What type of starter motor mechanism engages with the engine and then releases once the engine starts?
Bendix mechanism
When maintaining DC motors, what is typically the first component to inspect?
Wiring and connections
How does a sprag clutch-type starter motor differ from a Bendix-type?
It disconnects from the engine automatically when torque is too high
Which type of electrical valve uses a magnetic coil to create linear movement?
Solenoid valve
What common issue might cause a growling noise in an AC motor?
A bad capacitor
Why is the starter/generator combination commonly used on turbine engines?
It saves weight by combining two functions into one unit
Why must the rotor in an induction motor lag behind the rotating magnetic field?
To produce torque
What distinguishes a synchronous motor from other AC motors?
Its rotor stays in exact sync with the rotating magnetic field
Why do reciprocating engines require high starting torque at low RPM?
To overcome initial friction and compression
What is the function of the “A” terminal on a starter generator?
Shunt field for generator function
