76. Get Answer D. 20. An oscillator employs ____________ feedback. Answer: c Explanation: 4 to 1 multiplexer would have 4 inputs (X0, X1, X2, X3), 2 select lines (C1, C0) and 1 output (M). The intermediate bleed provides air for the 3rd circuit. In AC to DC rectifiers, the DC link capacitors are used to maintain the smooth DC waveform. This is the Multiple Choice Questions in Operational Amplifiers Applications from the book Electronic Devices and Circuit Theory 10th Edition by Robert L. Boylestad. (d) none of the above. This biocide is used on a constant basis to prevent biological growth in a cooling tower. In modem EHV circuit breakers, the operating time between instant of receiving trip signal and final contact separation is, of the order of (A) 0.001 sec (B) 0.015 sec (C) 0.003 sec (D) 0.03 sec. What is the typical value of coupling capacitor Cc in RC coupling? This process dilutes the system water mineral concentrations that steadily increase due to water evaporation. 89. The driver transformer has center- tapped secondary to provide, A. b) The saturation voltage V CE for germanium transistor is more than silicon transistor. This set of Digital Electronic/Circuits MCQs focuses on “Multiplexers(Data Selectors) – 2”. 100. 58. In AC to DC rectifiers, the DC link capacitors are used to maintain the smooth DC waveform. 75. As is always the case, the transmitter capsule housing still contains process pressure; this will require bleeding. A 1 H inductance carrying the current of amperes will store the energy of. By increasing the saturation point, more minerals can exist in the system water and remain in the solution of the water without falling out of solution and forming scale. 57. Multiple Choice Questions (MCQs) 175 9.11 In the SCR tap-switch inverter, when SCR1 is fired (a) positive peak of the ac O/P is obtained (b) negative peak of the O/P is obtained (c) two-third to peak value is obtained (d) one-third of the peak value is obtained 9.12 In Fig. 87. Practically, the voltage gain of an amplifier is expressed. 51. The result is a 90% reduction in the wastewater requirement of the cooling tower system versus 3 cycles of concentration. Cooling tower bleed-off/blowdown is the flushing of a portion of high mineral concentration cooling tower system water down the drain, while simultaneously replacing it with fresh water. Help me go forward with the same spirit. How much is the overall gain? 86. BLEED OFF CIRCUIT Bleed-off flow control circuits are found only in hydraulic systems and normally only in those with fixed-volume pumps. Choose the letter of the best answer in each questions. Which of the following describes a common collector amplifier? 16-5. 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What is the cause for low voltage when the breaker is off? 65. March 19, 2017 by admin « Back CONTENTS Next » 1. a. bleed off circuit is used to restrict the flow of fluid into the hydraulic cylinder b. bleed off circuit is used to restrict the flow of fluid out of the hydraulic cylinder c. bleed off circuits are used to reduce the speed of actuator d. all of the above 82. In other words there is no reactive component in DC Circuits so the power factor is 1. b. bleed off circuit is used to restrict the flow of fluid out of the hydraulic cylinder c. bleed off circuits are used to reduce the speed of actuator d. all of the above ANSWER: bleed off circuits are used to reduce the speed of actuator The Terlyn water conservation program is targeted to save 4 million gallons of potable water and reduce our water utility bills more than $37,000 annually. 80. 67. Role of Bleeder Resistors in Power Electronics Circuit: In high voltage DC power supply, capacitors are used to smooth out the fluctuations in the output side. Electrical size of coupling capacitor becomes very large, D. Electrical size of coupling capacitor becomes very small. Choose the letter of the best answer in each questions. 70. 71. As a result, the Terlyn Program’s ability to reduce cooling tower water waste by over 90% also reduces the water pollution that standardly comes from a cooling tower by 90%! What class of operation is used either where the signal needs to be cut in half, such as in pulse detector or noise detectors or where push-pull operation of two stages is required? 84. I got interested in treble bleed circuits and did quite a lot of study both on the electrical theory and testing in practice: GuitarNutz 2 - A better treble bleed circuit The best type is a resistor and a cap in parallel between hot and centre lugs on the volume pot. “While rolling down on the volume, the lows come up, so I wanted to push them back down a little to level out the sound.” Why is my outlet voltage abnormal? High voltage gain, low current gain, high power gain and very low input resistance, B. 72. So in our example above, that 500 ton cooling tower is flushing 3.9 Million gallons of cooling tower water containing this toxic biocide down the drain every year. When a quarter-wave section transmission line is terminated by a short circuit and is connected to an RF source at the other end, its input impedance is . Figure showing below the Bleed-off flow control circuit, where we … 73. May 6, 2017 by admin « Back CONTENTS Next » 1. (c) Norton’s theorem. Role of Bleeder Resistors in Power Electronics Circuit: In high voltage DC power supply, capacitors are used to smooth out the fluctuations in the output side. An electronic transfer from one stage to the next is termed as ____________. 79. Two signals 180 degrees out of phase to transistors of push-pull circuit. … A type of oscillator wherein the frequency is determined by the charge and discharge of resistor-capacitor networks used in conjunction with amplifiers or similar devices. The basic reason why a full wave rectifier has a twice the efficiency of a half wave rectifier is that a. it makes use of transformer b. its ripple factor is much less c. it utilizes both half-cycle of … 59. When connected to a load the output drops to 56V. 11256 47th Street North MCQ in Rectifier ; MCQ in Filters ; MCQ in Voltage Regulation; Continue Practice Exam Test Questions Part 2 of the Series. 1. This breaks down to approximately 10,800 gallons of waste per day, 450 gallons per hour, or 7.5 gallons per minute being flushed down the drain from the cooling tower system 24 hours a day, 7 days a week. MCQs on Electrical Circuit Theory. 85. a) Bleed off circuit is used to restrict the flow of fluid into the hydraulic cylinder b) Bleed off circuit is used to restrict the flow of fluid out of the hydraulic cylinder c) Bleed off circuits are used to reduce the speed of actuator The bleeder resistor is used in the circuit for safety purposes. 52. For BJTs a snubber circuit consists of a small series inductor L connected in the collector circuit, and an RC network is connected between the collector and emitter as shown in Figure. This process dilutes the system water mineral concentrations that steadily increase due to water evaporation. 77. 8) Why accumulator are used in hydraulic circuit? What is the advantage of RC coupling scheme? This type of flow control circuit bleeds off excess fluid to tank. But it is also useful to improve the voltage regulation and a tapped resistor used as a voltage divider. This is achieved by increasing the saturation point of the system water using a scale inhibitor treatment. Answer 2 False Explanation: There is no concept of power factor improvement in DC Circuits because the phase angle (θ) between Current (I) and voltage (V) is 0 and the then power factor becomes Cos θ = 1. 53. Multiple Choice Questions (MCQs) 175 9.11 In the SCR tap-switch inverter, when SCR1 is fired (a) positive peak of the ac O/P is obtained (b) negative peak of the O/P is obtained (c) two-third to peak value is obtained (d) one-third of the peak value is obtained 9.12 In Fig. 51. bleeder-resistor-circuit. a) True b) False Ans: (a) 4. As you can see, cooling tower water conservation is not only important for general water conservation, but also from a pollution prevention standpoint. Multiple Choice Question (MCQ) of Electronics page-17:241. b. capacitive . algae, legionella, etc.). c) The saturation voltage V CE for silicon transistor is same as that for germanium. 66. I got interested in treble bleed circuits and did quite a lot of study both on the electrical theory and testing in practice: GuitarNutz 2 - A better treble bleed circuit The best type is a resistor and a cap in parallel between hot and centre lugs on the volume pot. In transistor amplifiers, what transformer is used for impedance matching? Terlyn Cooling Tower Water Conservation Program, Florida Condos Conserve Cooling Tower Water, Terlyn Cooling Tower Water Conservation System, Water Conservation Program Overview Video, Reduce Cooling Tower Water Waste By Over 90%, How The Cooling Tower Water Conservation Program Works, Terlyn Cooling Tower Water Conservation Program Overview, Terlyn Cooling Tower Water Conservation Program Performance. For BJTs a snubber circuit consists of a small series inductor L connected in the collector circuit, and an RC network is connected between the collector and emitter as shown in Figure. Cooling tower bleed-off/blowdown is the flushing of a portion of high mineral concentration cooling tower system water down the drain, while simultaneously replacing it with fresh water. 78. What is the reason why RC coupling is not used to amplify extremely low frequencies? Which frequency produces the highest noise factor? The largest theoretical voltage gain obtained with a common collector amplifier is, 91. It can be observed from this diagram: So it is really essential to add a bleeder resistor to avoid any mishaps. With no load on a circuit, I measure approx 15volts; Metal junction box shows 5V relative to ground when circuit powered. 54. If the resistance in parallel with a parallel resonant circuit is reduced, the bandwidth (A) Disappears (B) Becomes sharper (C) Increases (D) Decreases. Bleed-off circuit Flow to the cylinder is regulated by metering part of the pump flow to tank. The efficiency of class AB operation has a maximum of between _____________ percent. 96. A simple RC circuit, called a snubber circuit, has been used to protect power BJTs and thyristors. A fast bleed circuit is switched out during normal operation so that no power is wasted; when power is switched off, the fast bleeder is connected, rapidly bleeding down the voltage. A bleed-off circuit works best in hydraulic circuits using fixed-volume pumps. 64. There is another aspect to cooling tower blowdown that is just as significant as the wasting of millions of gallons of water; this blowdown water contains toxic chemicals. Bleed-off or bypass flow-control circuit -- at rest with pump running. 69. This is possible because our scale inhibitor treatment, CWT3, has a molecular bonding strength that is 30x higher than the strongest traditional scale inhibitor. In Preparation for the ECE Board Exam make sure to expose yourself and familiarize in each and every questions compiled here taken from various sources including but not limited to past Board Exam Questions in Electronics Engineering field, Electronics Books, Journals and other Electronics References. NEXT: MCQ in Electronic Circuits Part 3 | ECE Board Exam. A dc voltage supply provides 60V when the output is unloaded. Why are bleed off circuits used? A feedback circuit is ______________ frequency. This process dilutes the system water mineral concentrations that steadily increase due to water evaporation. The purpose of a biocide is to kill any bacteria or organisms that try to live inside the cooling tower”s water (ie. Yes I understand that is backwards of how air bleeds work. Power amplifiers handle _____________ signals. explain any one type of accumulator with sketch(4) 9) Explain with neat sketch quick exhaust valves (3) 10) State any four reasons of failure of hydraulic seals (3) 11) Explain pressure compensated flow control valve with neat sketch (4) In the above filter circuit, the resistor is connected parallel to the capacitor. 94. Integrated Circuit (3) Magnetism & Electromagnetism (21) Modulation (10) Multiple Choice Questions / Quiz (3) Rectifier and Regulated Power Supply (8) Resistance and Resistive circuits (13) Semiconductor (6) Tech (7) Thermoelectricity (4) Thyristors (6) Transformer (6) Two Port Network (1) 56. In some cases, cooling towers are allowed to flush their blowdown water not into the sanitary sewer system, but into the stormdrain that flows directly into the environment with no treatment whatsoever. What oscillator is used on order to produce frequencies in the microwave region? Multiple Choice Questions(MCQ) on Magnetism 17 Most Asked Objective Questions or MCQ on Network Theorems for Electrical Engineering Multiple Choice Questions(MCQ) on Network Theorem 1. Why? 63. Also provides professionals with materials for their lectures and practice exams. The circuit in Figure 16-5 operates a slide gate on a waste material bin that opens hydraulically to fill a transfer truck. Increasing the overall Beta is an advantage of. However, it does not compensate for pump slip. B. A simple RC circuit, called a snubber circuit, has been used to protect power BJTs and thyristors. 62. High viscosity 3. 10.40. Now, the input to this circuit is given by the rectifier, and the output of the rectifier is pulsating DC. The final stage of an amplifier uses ____________ coupling. Because of the speed/power tradeoff, high-powered circuits may use two separate bleeder circuits. The capacitors are considered ________________ in the dc equivalent circuit of a transistor amplifier. The circuit is located in a remote area that is prone to power failure, so it was designed to automatically close the gate in case power went off. Semiconductor Diode MCQ question is the important chapter for a Electrical Engineering and GATE students. (b) received energy. An air gap is usually inserted in magnetic circuits to (a) increase m.m.f. 93. We will remain open for business during the pandemic. There is little or no advantage to using this type flow control with pressure-compensated pumps. 1. Forward bias to transistors of push-pull circuit, B. 81. 99. Smaller bleed will enrich, larger will lean. Multiple Choice Questions(MCQ) on Magnetic Circuit for Electrical Engineering. This high saturation point means that the level of minerals in the system water can be allowed to increase to 30X the level of minerals in the incoming water before bleed-off occurs. Quickly evaporates by thebuzzfeed with answers and explanation. This extremely high molecular bonding strength allows our CWT3 treatment to hold significantly more minerals in the solution of the water without scale formation. 4 to 1 MUX would have _____ a) 2 inputs b) 3 inputs c) 4 inputs d) 5 inputs View Answer. The gain of an amplifier __________ when negative feedback is added. If you are looking for a reviewer in Electronics Engineering this will definitely help. Categories: Hydraulic Circuits | … What Is Cooling Tower Bleed-Off / Blowdown? 92. Fig. What coupling provides maximum voltage gain? Calculate the value of the voltage regulation. What is the basic purpose of applying negative feedback to an amplifier? A. Inversely proportional to square root of. This circuit is more efficient than meter-in or meter-out, as pump output is only high enough to overcome resistance. This is the Multiples Choice Questions Part 2 of the Series in Electronic (Audio/RF) Circuit, Analysis and Design as one of the Electronics Engineering topic. 68. 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