Description : Why are synchro capacitors placed physically close to differentials transmitters and CTs?
Last Answer : To keep the connections as short as possible in order to maintain system.
Description : What type of current is eliminated by synchro capacitors?
Last Answer : Magnetizing current.
Description : What type of synchros usually require the use of synchro capacitors?
Last Answer : TDXs, CDXs, and Cts.
Description : What leads in a simple synchro system are connected to the ac power line?
Last Answer : The rotor leads.
Description : What precaution should you take when substituting a synchro tester in a circuit for a transmitter?
Last Answer : Use only one receiver so as not to overload the tester.
Description : What type of indicator is usually placed in the stator circuit of a torque synchro system?
Last Answer : An overload indicator.
Description : In a full-wave voltage doubler, are the capacitors connected in series or in parallel with the output load?
Last Answer : In parallel.
Description : What tool is used to de-energize capacitors in a circuit that has been disconnected from its power source?
Last Answer : Shorting probe.
Description : Three capacitors 15µf, 18µf and 12µf are connected in a circuit. Find equivalent capacitance when they are connected in – 1) Series 2) Parallel
Last Answer : Ans: Value of equivalent capacitance: Given: C1= 15μF, C2=18 µF, C3= 12µF i)For Series combination of capacitors: 1/Cs = (1/C1)+( 1/C2) +(1/C3) = (1/15)+( 1/18)+( 1/12) 1/Cs = 0.0666+0.0555+0. ... Cs = 4.868 µF ii) For parallel combination of capacitors: Cp = C1 + C2 + C3 = 15 +18+ 12 = 45 µF
Description : What is the reference point for alignment of all synchro units?
Last Answer : The voltmeter method.
Description : . What type of synchro system is used to transmit very large quantities?
Last Answer : A tri-speed synchro system.
Description : In a dual-speed synchro system what determines the two specific speeds at which the data will be transmitted?
Last Answer : The gear ratio between the two transmitters.
Description : What is the most probable cause of trouble in a synchro system that has all of its receivers reading incorrectly?
Last Answer : The transmitter or main bus.
Description : Name two types of trouble you would expect to find in a newly installed synchro system.
Last Answer : Improper wiring and misalignment.
Description : What should you do with a synchro that has a bad set of bearings?
Last Answer : Replace it.
Description : When you zero a synchro with a synchro tester, what is indicated by a jump in the synchro tester's dial when the S1 and S3 leads are momentarily shorted?
Last Answer : The synchro under test is not on electrical zero.
Description : What method of zeroing a synchro is perhaps the fastest but NOT necessarily the most accurate?
Last Answer : . The electrical lock method.
Description : When you zero a multispeed synchro system which synchro should you zero first?
Last Answer : The coarse synchro.
Description : Why should a synchro be rechecked for zero after it is clamped down?
Last Answer : To ensure that it did not move off zero while it was being clamped.
Description : When is a synchro receiver (TR) properly zeroed?
Last Answer : A TR is zeroed when electrical zero voltages exist across its stator windings at the same time its rotor is on zero or on its mechanical reference position.
Description : What is the purpose of the coarse setting of a synchro?
Last Answer : .It ensures the synchro is on 0º, not 180º.
Description : What is the main reason for using a multispeed synchro system instead of a single-speed synchro system?
Last Answer : Greater accuracy without the loss of self-synchronous operation.
Description : What is the name given to the synchro system that transmits data at two different speeds?
Last Answer : . A dual or double-speed synchro system.
Description : What is the purpose of the synchro capacitor?
Last Answer : To improve overall synchro system accuracy by reducing stator currents.
Description : In a control synchro system, when is the output of the CT reduced to zero?
Last Answer : When the CX and CT rotors are in correspondence.
Description : What type of synchro is used in systems requiring large amounts of power and a high degree of accuracy?
Last Answer : A control synchro.
Description : What determines whether a differential synchro adds or subtracts?
Last Answer : The way the differential synchro is connected in a system is the deciding factor on whether the unit adds or subtracts its inputs.
Description : What two components make up a simple synchro transmission system?
Last Answer : A synchro transmitter and a synchro receiver.
Description : What method is used to prevent oscillations in large synchro units?
Last Answer : Mechanical damping.
Description : What is the physical difference between a synchro transmitter and a synchro receiver?
Last Answer : A synchro receiver uses some form of damping to retard excessive oscillations or spinning.
Description : Describe the zero-position of a synchro transmitter.
Last Answer : The transmitter is in its zero-position when the rotor is aligned with the S2 stator winding.
Description : When will a synchro generate more heat than it is designed to handle?
Last Answer : Synchros have one primary winding that can be turned through 360º and three secondary windings spaced 120º apart.
Description : What unit of measurement refers to the torque of a synchro transmitter
Last Answer : Ounce-inches.
Description : In a TDX system with standard synchro connections, the TX rotor is at 120º and the TDX rotor is at 40º. What position will the TR indicate?
Last Answer : . 80º.
Description : What are the two major components of a synchro?
Last Answer : The rotor and the stator.
Description : On the synchro schematic symbol, what indicates the angular displacement of the rotor?
Last Answer : . The position of the arrow.
Description : Which of the two synchro designation codes is indicated by 5DG on a synchro nameplate?
Last Answer : The Navy prestandard designation code.
Description : What does the code 26V-11TX4D mean on a synchro nameplate?
Last Answer : It is the third modification of a 26-volt 400-hertz (torque) synchro transmitter whose body diameter is between 1.01 and 1.10 inches
Description : What is the difference between a torque synchro and a control synchro?
Last Answer : A torque synchro is used for light loads and a control synchro is used in systems desired to move heavy loads.
Description : Name the two general classifications of synchro systems
Last Answer : Torque and control.
Description : What is the primary purpose of a synchro system?
Last Answer : Precise and rapid transmission of data between equipment and stations.
Description : Before working on electrical equipment containing capacitors, what should you do to the capacitors?
Last Answer : Discharge them by shorting them to ground.
Description : What effect does an increase in capacitance have on a capacitor’s opposition to current flow?
Last Answer : Opposition to current flow decreases.
Description : Why is the use of large value capacitors in filter circuits discouraged?
Last Answer : Expense
Description : Which oscillator uses tapped capacitors for feedback?
Last Answer : Colpitts.
Description : Examine the three capacitors shown below. What is the capacitance of each?
Last Answer : a. 26µF or 260,00pF b. 630pF c. 9600pF
Description : Charged capacitors can kill. True or false?
Last Answer : True.
Description : Identical dielectric slabs are inserted into two identical capacitors `A` and `B`. These capacitors and a battery are connected as shown in figure. No
Last Answer : Identical dielectric slabs are inserted into two identical capacitors `A` and `B`. These capacitors ... , which fully appears as heat in the circuit
Description : If the capacitors are connected in parallel, then the potential difference across each capacitor is A. same B. different C. zero D. infinite
Last Answer : same