What are the functions of protective relays To detect the fault and initiate the operation of the circuit breaker to isolate the defective element from the rest of the system, thereby protecting the system from damages consequent to the fault. 21. 1.A single phasing relay can be used with, a) 1ɸ motor In the above figure, the relay circuit is divided into three parts. Ans: (c), a) Directional type b) The saturation voltage V CE for germanium transistor is more than silicon transistor. a) The saturation voltage V CF of silicon transistor is more than germanium transistor. Which of the following statement is correct? The conduction in JEFT is always by the Multiple Choice Question (MCQ) of Electronics page-17:241. As the operating time of primary relay is less than that of the backup relay, it will operate first. Ans: (a), a) Current Economics of Operation page-5, Objective Type Question or MCQ of B. c) 0.01 sec While the relay can close a contact on activation (called normally open, NO), it can also open a contact (normally closed, NC)—or both, using multiple contacts; The relay can control more than one NO or NC contacts; you can get three, four, or even more independent NO and NC contacts ( … Economics of Operation page-2, Objective Type Question or MCQ of B. b) MHO type C. 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A bimetal strip, in a thermal relay, consist of two metal strips of different . Ans: (b), a) Permanent moving magnet Ans: (a), a) In three zones B. … This impedance or corresponding distance is known as reach of the relay. Ans: (a), a) Load Multiple Choice Question (MCQ) of Electronics page-16:226. In the yeast signal transduction pathway, after both types of mating cells have released the mating factors and the factors … b) In two zones b) Sense the fault b) Interphase faults b) Over voltage c) 3 ɸ motor d) The saturation voltage VCE for silicon transistor is lower than germanium transistor. c) Inter turn faults d) Electrons Distance relay operates whenever the impedance seen (V/I) seen by the relay is less than the specified set value. In which of the following device the base resistors are not added in the package but added externally? Ans: (c). In a conventional control relay, the contacts immediately change when the control circuit is energized. This set of Data communication and Networking Multiple Choice Questions and Answers (MCQs) focuses on “Frame Relay ”. (a) protect the line. d) Impedance Multiple Choice Question (MCQ) of C. Power System Protection page-3. differential relay operates when the phasor … Assume circuit breaker … Ans: (d), a) Over load faults Multiple Choice Quiz “Public relations” can be defined as Multiple choice questions and answers on public relations. d) Inner and bound electrons are always present in the semiconductor. a) The saturation voltage V CF of silicon transistor is more than germanium transistor. Explain how output contacts in conventional relays are switched differently than that of time delay relays. b) Avoid overheating of transformer Ans: (c), a) Equal to voltage element torque d) Inner and bound electrons are always present in the semiconductor. b) Back up stop c) Less than voltage element torque Quiz Bowl - mix of turn-based and toss-up questions pitting one team against another. b. c) Independent of zone c) Free electrons are always present in the semiconductor. Economics of Operation page-4, Objective Type Question or MCQ of B. The materials whose electrical conductivity is usually less than 1 × 106 mho/m are I want to add multiple relays (approximately 36 to 40) to an Arduino Uno board (using only a few pins). Multiple Choice Question (MCQ) of Protective Relays page-4. In the following figure, the tripping circuit is__________. Identify the choice that best completes the statement or answers the question. Specific heat . Relay Race - quick numerical problems that require the data from the runner before you. c) Over current a) The saturation voltage V CF of silicon transistor is more than germanium transistor. b) 2r ɸ motor – Martynas May 4 '17 at 21:48. Multiple Choice Question (MCQ) of Electronics page-17:241. For beginners they are best choice. d) None of these Consider a primary relay A having operating time of 0.1 sec. D. All of the above (C) Both of the … Individual Challenge - multiple choice problems trying to get at a different perspective than the usual quiz. b) Minority carriers b) Induction cup Ans: (c), a) Impedance type Thermal Relay | Thermal Relay Objective Type Questions and answers; 36. The answer choices are randomized, so the quiz will be different every time you take it. Subscribe To Posts Comments Archive. c. … You could not unaided going in imitation of book Also explore over 60 similar quizzes in this category. 1 The address field of a frame is 01101000 00001111. Thermal overload relays are used to protect the motor against over current due to (a) ground (b) heavy loads (c) short-circuits (d) none of the above ... Power Electronics mcq power electronics multiple choice questions - 1. b) Bound electrons are always present in the semiconductor. c) Adequateness & selectivity b) Conductors Which of the following statement is true? d) None of these And they are so easy to use. … a) The saturation voltage VCF of silicon transistor is more than germanium transistor. c. Tripping circuit. c) The saturation voltage V CE for silicon transistor is same as that for germanium. A. b) Bound electrons are always present in the semiconductor. Secondary of the CT and the operating coil. Classify the following as automatic control, manual control, discrete control or continuous control. Refer to the diagram below to answer Question 5 to Question 8 Q5. a) Inner electrons are always present in the semiconductor. With a time-delay relay, the contacts do not change state until a predetermined time after the input is either energize or de energized. Economics of Operation page-5, Objective Type Question or MCQ of B. b) Minority carriers d) All of these d) All of these (A) Delayed trip action. b) Overhead line equipment ... relays and so on). a) The saturation voltage VCF of silicon transistor is more than germanium transistor. All the Multiple Choice Question and Answer (MCQs) have been compiled from the books of Data Communication and Networking by the well known author behrouz A forouzan. c) Insulators Economics of Operation page-4, Objective Type Question or MCQ of B. b) Conductors Give the consequences … c) PUT b) CUJT b) Heavy Loads Primary winding of a current CT which is connected in series with the line to be protected. b) Alternator c) Shaded pole c) Rotor faults (b) open the circuit. This quiz reviews some of the topics in this chapter. b. DC. c) The saturation voltage V CE for silicon transistor is same as that for germanium. The materials whose electrical conductivity is usually less than 1 × 106 mho/m are Multiple Choice Question (MCQ) of Electronics page-17:241. c) Both (a) and (b) Try this amazing Relays And System Protection quiz which has been attempted 719 times by avid quiz takers. What Is The Operation Principle Of Differential Relay? Ans: (c), a) Transformer ____ 1. a) Earth faults c) Both (a) and (b) c) The saturation voltage V CE for silicon transistor is same as that for germanium. Ans: (d), a) Speed & reliability c) Sense the fault and direct to trip the circuit breaker Temperature . Translate. A directory of Objective Type Questions covering all the Computer Science subjects. d) None of these Practice for BBA or MBA exams using these MCQ. c) Holes Which of the following statement is true? 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