Synchros, Servos And Gyros Principles: Exam!
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- 1.Which of the following terms accurately describes a synchro?
- A.
Position-sensing
- B.
Electromechanical
- C.
Rotary
- D.
Each of the above
- 2.What are the two general classifications of synchro systems?
- A.
Torque and load
- B.
Torque and control
- C.
Load and control
- D.
Load and lock
- 3.What is the difference in application between the two classifications of synchros?
- A.
Light versus heavy load
- B.
Mechanical versus electrical Output
- C.
Circular versus straight-line motion
- D.
High-frequency versus low-frequency operation
- 4.Which of the following types of synchro devices provides a mechanical output?
- A.
A control transformer
- B.
A torque receiver
- C.
A torque transmitter
- D.
A control transmitter
- 5.A 115-volt, 400-Hz torque transmitter with a diameter of 2.36 inches will have what military standard designation code?
- A.
115 V-23CT6
- B.
115 V-24TT4
- C.
23TD4
- D.
24TX4
- 6.A 3.5-inch diameter differential receiver will have what Navy prestandard designation code?
- A.
35CR
- B.
35TDR
- C.
5D
- D.
5DG
- 7.What does the arrow on a synchro schematic symbol indicate?
- A.
The direction of current flow
- B.
The direction of rotor movement
- C.
The angular position of the stator
- D.
The angular position of the rotor
- 8.What are the two major components of a synchro?
- A.
The rotor and the stator
- B.
The housing and the stator
- C.
The rotor and the shaft
- D.
The housing and the shaft
- 9.What type of rotor can be composed of a single winding or three Y-connected windings?
- A.
Salient-pole
- B.
Drum or wound
- C.
Fixed
- D.
"H"
- 10.How does the stator of a TX receive voltage?
- A.
By a physical connection with the rotor
- B.
By a magnetic coupling with another stator
- C.
By a magnetic coupling with the rotor
- D.
By a physical connection with a source
- 11.What part of a synchro provides a point for external connections?
- A.
The terminal board
- B.
The slip ring
- C.
The stator
- D.
The brush
- 12.Which of the following terms is defined as the amount of load a machine can turn?
- A.
Radian force
- B.
Load factor
- C.
Torque
- D.
Tension
- 13.Which of the following units should be used in measuring the amount of turning force of a synchro?
- A.
Ounces
- B.
Pounds
- C.
Foot-pounds
- D.
Ounce-inches
- 14.An overloaded synchro will probably exhibit which of the following conditions?
- A.
Overspeed
- B.
Oscillation
- C.
Excessive temperature
- D.
Noisy operation
- 15.A synchro receiver has which of the following characteristics that is NOT found in an ordinary transformer?
- A.
A primary that can rotate in relation to the secondary
- B.
A primary magnetically coupled to the secondary
- C.
A step-up turns ratio
- D.
An air core
- 16.When a synchro transmitter is in the zero-degree position, the rotor is aligned in what manner?
- A.
With winding S1
- B.
With winding S2
- C.
With winding S3
- D.
Between winding S1 and S2
- 17.Maximum voltage is induced in a stator winding of a synchro transmitter when the rotor and the stator winding have what angle between them?
- A.
0 degrees
- B.
30 degrees
- C.
60 degrees
- D.
90 degrees
- 18.Which of the following factors does NOT affect the amplitude of the voltage induced in a stator winding of a synchro transmitter?
- A.
The angular displacement between the rotor and stator
- B.
The amplitude of the primary voltage
- C.
The speed of data transmission
- D.
The turns ratio of the synchro
- 19.Damping is necessary for which of the following synchro devices?
- A.
Receiver
- B.
Transmitter
- C.
Control transformer
- D.
Differential transmitter
- 20.The primary purpose of damping is to reduce which of the following conditions in a synchro device?
- A.
Readings 180ยบ out of phase
- B.
Overheating
- C.
Oscillating
- D.
Each of the above
- 21.What is the minimum number of synchro devices needed for a simple synchro transmission system?
- A.
One
- B.
Two
- C.
Three
- D.
Four
- 22.In a simple synchro system, what leads are connected to the source voltage?
- A.
R1 and R2
- B.
S1 and S2
- C.
S2 and S3
- D.
R1 and S1
- 23.When a synchro transmitter, and receiver are in correspondence, what is the relative value of the (a) current through the stators and (b) receiver torque?
- A.
(a) Maximum (b) maximum
- B.
(a) Maximum (b) minimum
- C.
(a) Minimum (b) minimum
- D.
(a) Minimum (b) maximum
- 24.What term applies to the angle through which a synchro transmitter rotor is rotated mechanically?
- A.
Lag
- B.
Lead
- C.
Gain
- D.
Signal
- 25.If a synchro receiver is required to rotate in a direction opposite to the rotation of the transmitter rotor, what leads should be reversed?
- A.
R1 and R2
- B.
S1 and S2
- C.
S2 and S3
- D.
S1 and S3
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