4
1-31. In a TDX system, for the TR rotor to
follow the TX rotor exactly, in what
position must the TDX rotor be kept?
1. 0 degree position
2. 60 degree position
3. 120 degree position
4. 240 degree position
1-32. What is the angular position of a TR
rotor when it is pointing to the S3
winding?
1. 0 degrees
2. 60 degrees
3. 120 degrees
4. 240 degrees
1-33. If a TDX system with standard synchro
connections has the TX rotor at the 60-
degree position and the TDX rotor at the
270-degree position, what is the position
of the TR rotor?
1. 110 degrees
2. 150 degrees
3. 210 degrees
4. 250 degrees
1-34. For a TDX system to add its inputs rather
than subtract them, what leads must be
reversed between (a) the TX and TDX,
and (b) the TR and TDX?
1. (a) S1 and S2
(b) R1 and R3
2. (a) S1 and S3
(b) R1 and R3
3. (a) S2 and S3
(b) R1 and R2
4. (a) S1 and S3
(b) R1 and R2
1-35. For a TDR system to add its inputs rather
than subtract them, what leads must be
reversed at the TDR?
1. S1 and S3
2. S1 and S2
3. R1 and R3
4. R1 and R2
1-36. If a TDR system is connected for
addition and the TX rotor connected to
the TDR rotor turns counterclockwise, in
what direction will the TDR rotor field
rotate?
1. In a direction determined by the other
TX stator
2. In a direction determined by the other
TX rotor
3. Counterclockwise
4. Clockwise
1-37. Which of the following types of synchros
is used in a system requiring large
amounts of power and high accuracy?
1. Torque
2. Control
3. Differential
4. Each of the above
1-38. What are the three types of control
synchros?
1. TX, TR, CT
2. TX, CDX, CR
3. CX, CT, CR
4. CX, CT, CDX
1-39. The CX and CDX differ from the TX and
TDX because the CX and CDX have
which of the following characteristics?
1. Lower impedance windings
2. Higher impedance windings
3. Larger physical size
4. Smaller physical size
1-40. Which of the following is NOT a
characteristic of the rotor of a control
transformer (CT) rotor?
1. It is connected to a high-impedance
load
2. It must be turned by an external force
3. It is connected to an ac source
4. It has a drum- or wound-type rotor
