Examen EASA M4

In a synchro system, if two stator lines are crossed the receiver will. be 180° out. not be affected. reverse direction.

In an E and I signal generator at datum, the voltage on the secondary windings. is zero. is maximum. are equal and opposite.

In a synchrotel, the. stator coil is fixed and the rotor coil moves. rotor coil and stator coil is fixed. rotor coil is fixed and the stator coil moves.

An E&I transformer out of datum has. equal and opposite voltages in each windings. unequal and opposite voltages in both windings. no voltage in either winding.

When is maximum voltage induced into the rotor of a control synchro transformer?. 90 degrees (null position). 0 degrees. When spinning fast.

To check the output of a synchro stator it would be preferable to use. a Valve Voltmeter. a Cambridge Bridge. an Avometer.

Synchro capacitors are connected into synchro systems to. act as spark suppression due to wear of the slip rings. increase the accuracy of the control synchro. minimize the torque synchro stator current at null.

In a slab desynn transmitter the. pick-offs form part of the circuit resistance. pick-offs rotate on the slab resister. pick-offs are connected to a spark suppressor.

If, in a servo system, the amplitude from the feedback system is below normal, the servo will. be sluggish in operation. oscillate. be overdamped.

A desynn instrument has a positive regular increasing error, you would adjust. lever length. lever angle and lever length. lever angle.

Torque synchro receiver bearing friction will cause. improved accuracy. misalignment. hunting.

A control synchro system pointer is. actuated by a permanent magnet. displaced by the torque of the stator. motor driven.

A D.C. signal converted to a phase sensitive A.C. is. modulation. demodulation. phase conversion.

The rotor coil of a synchrotel. rotates only when a current flows in it. rotates. is stationary.

The purpose of synchro capacitors in a differential synchro transmission system. reduce stator circuit impedance. to reduce stator current. reduce rotor current.

The purpose of a flywheel in a synchro receiver indicator is to. increase driving torque. prevent spinning or oscillation. encourage spinning.

A linear variometer is. a special synchro giving ac output proportional to shaft angle. a special auto transformer for synchro system power supplies. an alternative term for a desynn system.

In a synchrotel the rotating winding is. the stator. rotor. neither.

The receiver rotor in a torque synchro system oscillates over an arc of approx 75 degrees. The probable cause is. one stator line open circuit. two stator lines reversed. short circuit between two stator lines.

Synchro capacitors are fitted. to improve sensitivity and accuracy. to provide critical damping. to make additional damping features unnecessary.

The output of a control transformer is made. phase and amplitude sensitive by direction and magnitude of the transmitter rotor movement respectively. phase and amplitude sensitive by magnitude and direction of the transmitter rotor movement respectively. phase sensitive by transmitter rotor excitation and amplitude sensitive by direction of transmitter rotor movement.

The letter "B" following the identification code on the case of a synchro denotes. that the synchro is second hand. the modification status. that the stator is rotatable.

TX is the abbreviation for a. torque transmitter. control transformer. torque receiver.

TR is the abbreviation for a. transmitter Resolver. torque receiver. torque synchro.

When a synchro system is in correspondence, its transmitter and receiver. are in phase. are anti-phase. are at 90° to each other.

The reference phase to a synchro is. 50 Hz. 28 VDC. 400 Hz.

In rate feedback, when the motor has reached the commanded position, the output will be. maximum and in-phase with the input. maximum and out-of-phase with the input. zero.

What power is required for a desynn indicator system?. DC. AC 400 Hz. AC 50 Hz.

What material would have 3 electrons in the outermost orbit?. Majority Carrier material. The donor to an N-Type semi-conductor material. The acceptor to a P-Type semi-conductor material.

A microprocessor on a PCB. is not easily damaged by static-electricity. is easily damaged by static-electricity if mishandling. is only easily damaged by static-electricity if removed from teh PCB.

On a torque synchro, the AC power supply is applied to. the rotors of both the transmitter and the receiver. the rotor of the transmitter only. the stators of both the transmitter and the receiver.

The Characteristic Curve of a transistor is plotted on axis of. base current against Vec. collector current against Vbe. collector current against Vec.

Amplifier output characteristics are defined by. the collector resistance. the effect of the load resistor. the configuration of the transistor.

A device which provides cheap and convenient variable power supply is a. Diac. Variac. Triac.