15
2-55. Which of the following is NOT a
difference between IC synchros and
standard synchros?
1. Amount of torque available
2. Construction of the stator
3. Construction of the rotor
4. Principle of operation
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USE THE FOLLOWING INFORMATION IN
ANSWERING QUESTIONS 2-56 AND 2-57.
A SYNCHRO SYSTEM USING AN IC
TRANSMITTER HAS THE REQUIREMENT
THAT THE RECEIVER TURN IN THE
OPPOSITE DIRECTION FROM THE
TRANSMITTER.
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2-56. If an IC receiver were used, what
winding of the receiver would be
connected to winding R1 of the IC
transmitter?
1.
R1
2.
R3
3.
S1
4.
S1
2-57. If a standard synchro receiver were used,
what winding of the receiver would be
connected to winding R3 of the IC
transmitter?
1.
R1
2.
R3
3.
S1
4.
S3
2-58. Angular data is to be transmitted and dc
is the only power available. Which of
the following systems should be used?
1. Resolver system
2. IC synchro system
3. Step-transmission system
4. Servo system using a CT and a dc
servo motor
2-59. A step-transmission system is to be built
in which the steps are to be smaller than
the steps in the system shown on page 4-
3 of the text. What must be done to the
system shown in the text to accomplish
this change?
1. Increase the number of coils
2. Decrease the number of coils
3. Increase the supply voltage
4. Decrease the supply voltage
2-60. Which of the following is an advantage
that a step-transmission system has over
a standard synchro system?
1. Smaller changes in data can be
transmitted
2. Transmitted data is "smoother"
3. Synchronizing is not needed
4. Cost is considerably less
2-61. A resolver performs which of the
following mathematical functions?
1. Differentiation
2. Trigonometric
3. Integration
4. Algebraic
2-62. Resolvers are used aboard a ship to keep
a gun mount steady regardless of the
pitch and roll of the ship. What
characteristic of the resolver makes it
especially useful for this application?
1. Provides instant solutions with
constantly changing inputs
2. Provides higher power gain for
greater accuracy
3. Uses error-rate damping for smoother
solutions
4. Uses ac for greater efficiency
