MCBs (Miniature Circuit Breakers): Switching OFF during abnormal conditions to interrupt the fault current. GUJARATI MCQ; MGVCL Exam Paper (30-07-2021 Shift 2) MGVCL Exam Paper (30-07-2021 Shift 2) The miniature circuit breaker (MCB) with Class D trip characteristics trips instantaneously when the current flowing through it reaches ____ the rated current. MCB stands for Miniature Circuit Breaker. . It is designed to protect electrical appliances and human beings from electrical shocks and faults. Earth leakage circuit breaker. It is used in the place of Fuse when the amount of electricity is increasing in the wire. Building Services Multiple choice questions and answers, Important MCQ of Building Services, Solved MCQs for Building Services, Fuse and circuit breakers are one of the critical components of an electrical system. Question 1. This function of automatic switching is accomplished by a bimetallic strip. 1489 Thermal-Magnetic Circuit Breakers. For example, a domestic MCB would normally have a 6kA fault level, whereas one used in an industrial application may need a unit with a 10kA . However, fuse may sense these conditions but it has to be replaced though MCB can be reset. Electrical Relays MCQ Questions & Answers. In the beginning, fuses were used in place of MCB. B. Miniature Circuit Breaker: B) Fuse: 1. They are designed to trip during an overload or short circuit to protect against electrical faults and equipment failure. The circuit breaker mainly operates during short circuits and overloads. The circuit breaker is an electrically operated switch, which is capable of safely making, as well as breaking, short-circuit currents. Miniature circuit breaker. 3. These MCQ Questions on Electric Current and Its Effects Class 7 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. 3. A ____________ is used in torches. A Miniature Circuit Breaker is a switchgear which is usually available in the range of 0.5A to 100A. Answerd The function of protective relay in a circuit breaker is to limit arcing current during the […] Low voltage circuit breakers have rated voltage of less than 220 V 400V 1000 V 10,000 V Answer 3. The miniature circuit breaker is a protective device that breaks or interrupts the circuit when an overload or short circuit occurs. Miniature Circuit Breaker (MCB) is an automatically operated electric switch. Compact Fluorescent Lamp Miniature circuit breaker. The function of protective relay in a circuit breaker is. You can know the answer to the question immediately after marking the solution. All the topics are covered in the form of objective MCQs with answer and explanation. Circuit breaker is a mechanical device designed to close or open contacts member thus closing or opening of an electrical circuit under normal or abnormal conditions. Bulletin 1489-M Thermal-magnetic Circuit Breakers are UL 489 Listed for branch circuit protection in the United States and Canada, and they are certified as Miniature Circuit Breakers for IEC applications. . Electrical Power Supply MCQs : This section focuses on the "Electrical Power Supply". In this type of starter, terminals of the motor are connected to the power supply through a contactor, circuit breaker, and protection device. (d) the ambient temperature. This breaks the circuit. The MCB is the most modern substitute for a conventional rewirable fuse and provides protection against overloads and short circuits. Geysers. A power B space C energy D electricity Filament is present in A center of the sealed glass B front of the sealed glass C roots of the sealed glass D head of the sealed glass Magnetic effect is present in A track B train C track and train both D wires above the train Friction can cause transfer of A neutrons B protons C electrons D photons Learn all the things regarding Circuit Breakers Electrical Engineering by referring to this article. Share. Related Questions on Circuit Breakers. Converts chemical energy into electrical energy: E) CFL: 3. 1. MCB is a advanced Technical device instead of Fuse. Answer: A.Miniature Circuit Breaker 53. 4. Easy operation. Circuit breakers are usually employed for the protection of electrical circuits, they are equipped with a . It has three-positions "ON," "OFF," and "TRIPPED". Intermediate switch Miniature circuit breaker Earth leakage circuit breaker Report Error Explanation 22) ELCB stands for Electrical Leakage Circuit Breaker Earth Leakage Current Breaker Earth Leakage Circuit Breaker Electrical Line Circuit Breaker Report Error Explanation 23) Earth Leakage Circuit Breaker (ELCB) works on the principle of 2. Class 7 Science Chapter 14 MCQ (Multiple Choice Questions) of Electric Current and Its Effect with answers and explanation for current academic session 2021-2022. The DOL starter is one of the types of Motor starter which connects the motor to the line voltages directly.. To start the induction motor in the simplest and cheapest way this type of starter is used.. Miniature Circuit breaker (MCB) This is an electro-mechanical device that breaks (that is, opens) the circuit when the current in it exceeds a given value. What is a circuit breaker? These Multiple Choice Questions (MCQs) should be practiced to improve the Electrical Relays skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations. Related Control Panel Wiring MCQ with Answers. Explanation: Image: For More Circuit Breakers MCQ Click Here. Electromagnet is used in. 6) Which type of load is protected by G? MCR-C Series Bolt-on Miniature Circuit Breaker. The minimum oil circuit breaker is also called a small or poor oil circuit breaker. An MCB or miniature circuit breaker is an electromagnetic device that embodies a complete enclosure in a molded insulating material. It has two contacts namely fixed contact & moving contact. Whenever continuous overcurrent flows through MCB, the bimetallic strip is heated and deflects by bending. 2. Answer: (d) the ambient temperature. c. Residential circuit code breaker . B. Mono circuit breaker. DOL stands for Direct On-Line. What is the range of current rating of single pole mcbs commercially available? Low voltage circuit breakers have rated voltage of less than. . Objectives for Electrician and Wireman: Circuit Breakers and Relays 1. The main function of an MCB is to switch the circuit, i.e., to open the circuit (which has been connected to it) automatically when the current passing through it (MCB) exceeds the value for which it is set. Circuit Breakers MCQ Quiz Answers With Solutions For each question, we have provided the Circuit Breakers Electrical Engineering MCQ Quiz Answers. Lets Crack Online Exam. Air conditioners. MCQ Series Bolt-on Miniature Circuit Breaker. Electrical Leakage Circuit Breaker. A circuit breaker is power factor correcting device a device to neutralize the effect of transients a waveform correcting device a current interrupting device Answer 2. SHOW ANSWER 2. They are self-acting and should safely interrupt the current flow on the event of faults. The miniature circuit breaker (MCB) with Class D trip characteristics trips instantaneously when the current flowing through it reaches ____ the rated current. It is an automatically operated electronics switch. 15. Remote operation . When there is overflow of electric current, it creates a magnetic field that repels the magnet present in the . A miniature circuit breaker (MCB) is an Electrical Switch which automatically switches off the electrical circuit during an abnormal condition of the network means in overload condition as well as faulty condition. Circuit Breaker Multiple Choice Questions - your electrical guide Circuit Breaker Multiple Choice Questions 1. 2. Whenever the wire fuses, one needs to replace the wire to resume electric supply. Arc interruption is done by a) High resistance interruption b) Low resistance interruption c) Both (a) and (b) The outer and inner layer of the circuit breaker is shown in the above figure. Related Circuit Breakers and Relays MCQ with Answers. RCCB stands for Have a glance at the MCQ of Chapter 14 Science Class 7 and cross-check your answers during preparation. d. Over voltage View Answer / Hide Answer. Air blast circuit breaker d. None . The circuit breaker is mainly designed for closing or opening of an electrical circuit, thus protects the electrical system from damage. The electric fuse has a big practical problem. Temperature. Miniature circuit breakers are intended to prevent damage to an electrical circuit as a result of excess current. Which of the following circuit breakers is used for the railway electrification? Answer: (d) decrease. The cut sheet is essentially a report that is used during the installation of electrical equipment. Basic Civil Engineering Multiple Choice Questions on "Building Services". Miniature circuit breakers break the circuit automatically. . It automatically switches OFF electrical circuit during any abnormal condition in the electrical network such as overload & short circuit conditions. MCQs: What is the full form of MCB? They are designed to trip during an overload or short circuit to protect against electrical faults and equipment failure. . Question 1. These circuit breakers are ideal for extreme ambient conditions, feature fast breaking time, and superior shock and vibration resistance. It has a switch which goes OFF automatically if there is overheating. It does not contain any wire like fuse, but its working is also based on heating effect of electric current. Miniature Circuit Breaker (MCB): 1. Amongst the wide range of products for sale choice, Miniature Circuit Breaker is one of the hot items. Miniature circuit breaker (MCB) is used in domestic and commercial installations for control and protection. It has automatic shutting mechanism known as 'tripping'. These circuit breakers are ideal for extreme ambient conditions, feature fast breaking time, and superior shock and vibration resistance. MCBs are widely used as isolating components in . The MCB turns off and the result is it breaks the circuits. Bulbs, wires, cells and switches are known as the of a circuit. A. Miniature Circuit Breaker. Solved Answer of MCQ The abbreviation of 'MCB' is for - (a) moving circuit breaker - (b) manual current breaker - (c) manual circuit breaker - (d) miniature circuit breaker - Electric Circuits and Currents Multiple Choice Question- MCQtimes a. Two or more cells joined together: D) Cell k: 5. For example, a cut sheet or data-sheet of an MCB (Miniature Circuit Breaker) provides important specifications like its rated current, poles . An MCB is an automatically operated electrical switch. Miniature circuit breakers are intended to prevent damage to an electrical circuit as a result of excess current. Earth Leakage Current Breaker. Building Services Multiple Choice Questions 1. Multiple Choice Question (MCQ) of Circuit Breaker page-1 ≪ Previous Next ≫ 1.Ionization in circuit breakers is facilitated by a) Increase of field strength b) Increase of mean free path c) High temperature d) All of these Ans: (d) 2. The contact resistance is least affected by. Minimum Oil Circuit Breaker (MOCB) - Construction, Working & Comparison. (D) a current interrupting device. Circuit Breakers MCQs 1. D. None. A device which prevents or allows the current to flow through it. Bulbs, wires, cells and switches are known as the of a circuit. As the force on contact is increased, the contact resistance will. It required a small percentage of oil (about 10% of oil) used in the case of the bulk oil circuit breaker. 1. Related Circuit Breakers MCQ - Electrician (Set-1) with Answers. 53. 2. MCQs: Miniature circuit breaker is a small - Science Mcqs - Chapter 6: Electrical Circuits & Electric Currents - Science Mcqs for Grade 7 Miniature circuit breaker is a device which acts as an automatic switch when current flowing through the metals strips inside it is exceeded the permissible value. In the event of fault, the circuit current rises abruptly and fuse wire melts to interrupt the circuit. A thermal protection switch provides protection against what? c. Short circuit. .A circuit breaker is a switching device that interrupts the abnormal or fault current. a. The external switching latch can be in the "TRIPPED" position if the MCB is tripped due to over-current. Ovens. এই ধরনের সার্কিট ব্রেকারের ব্রেকিং ক্যাপাসিটি লোডের মূল কারেন্টের ১০-২০ গুণ পর্যন্ত হয়ে থাকে। SF6 gas is transported in 14. Explanation: 5) Which switch with an actuator is operated by the motion of a machine or part of an object? 22) ELCB stands for. A miniature circuit breaker (MCB) automatically switches off the power supply during overload and faults. . For More Control Panel Wiring MCQ with Answers Click Here. Isolating switch Time delay relay Thermal overload relay Miniature circuit breaker Report Error Explanation 5) Which switch with an actuator is operated by the motion of a machine or part of an object? The overhead protection is achieved by a bimetallic strip . An MCB is an automatically operated electrical switch. C. Mega circuit breaker. While both circuit breakers and fuse perform the same job that is to prevent overloads, there are some differences between fuse and circuit breaker in the way they function. MCBs are place at supply of power instead of Fuses (Distribution . Miniature circuit breaker. Explanation: 22) ELCB stands for . MCB or Miniature Circuit Breakers is a mechanical switching device . MCB is an abbreviation of "Miniature Circuit Breaker". 3. What is Miniature Circuit Breaker (MCB) MCB (Miniature Circuit Breaker) is a switch or electromechanical device that serves as a protective circuit of electrical installations from over current. 2. Electrical Relays MCQs : This section focuses on the "Electrical Relays". Circuit Breakers - Objective Questions - Part 1. A circuit breaker is a a) Fuse b) Switch c) Resettable protective device d) Resistor Unlike a fuse, MCB does not have to be replaced every time after a fault occurs and it can be reset quickly and be reused. ANSWER: a. These days Miniature Circuit Breaker (MCB) is increasingly being used in place of fuses. Overload . Circuit Breakers Part one Instructions: Click the answer button to see the correct answer. টাইপ D Miniature Circuit Breaker. Explanation 4) Which device protects from overload and short circuit in a panel board? MCR Series Plug-in Miniature Circuit Breaker. Explanation: -. A circuit breaker is a device to neutralize the effect of transients a waveform correcting device power factor correcting device a current interrupting device. Circuit breaker is a safety device, which ensures the safety of equipment and personnel from electric shocks and damages. 4. In an overload condition or a faulty condition, it is used to interrupt the electrical current flow through the circuit. MCQ Questions for Class 7 Science: Ch 14 Electric Current and Its effects. Earth Leakage Circuit Breaker . Which of the following statement about SF6 gas is incorrect? It is designed to detect the fault in the electrical circuit by detecting the extreme amount of current flow in the circuit and breaks the circuit as soon as possible. Electrical Power Supply MCQ Questions & Answers. Electromagnet loses its magnetic property when. It's protects the home appliances from over flow of current and Short circuits. General lighting systems . Design engineers or buyers might want to check out various Miniature Circuit Breaker factory & manufacturers, who offer lots of related choices such as mcb, circuit breaker and mini circuit breaker. 1489 Thermal-Magnetic Circuit Breakers. The MCB is an electromechanical device which guards the . Its Short circuit rating is given in Kiloamps (kA), and this indicates the level of its ability to work. MCBs (Miniature Circuit Breaker) have been replacing electric fuse from wirings at most of the places. series MCB? - (A) Miniature contact breaker - (B) Mini circuit breaker 3. Under normal conditions the moving contact comes in contact with fixed contact thereby forming the closed contact for the flow of current. Miniature circuit breaker. MCB stands for ★ MCQs Electrical Engineering Electrical Installation and Wiring MCB stands for . Common Question Answer of Miniature Circuit Breaker From: Quisure 2019-09-27 1. MCB stands for "Miniature Circuit Breaker". A circuit breaker is. MCB stands for A. main circuit board B. main circuit breaker C. miniature circuit breaker D. all of these Right Answer is : C. miniature circuit breaker The operating mechanism of a miniature circuit breaker provides the means of manual opening and closing operation of a miniature circuit breaker. Miniature Circuit Breaker ( MCB) is a protection device used to protect an electrical circuit from damage caused by overload or short circuit. Fuse wire is made up of alloys of Hence, a cut sheet of any electrical equipment provides sizes, ratings, capacities of the equipment, etc. Safety device used in electric current: C) Battery: 2. The occurrence of this over current, may be caused by several symptoms, such as: short circuit and overload. In all subjects MCQs are asked in question papers. These Multiple Choice Questions (MCQs) should be practiced to improve the Electrical Power Supply skills required for various interviews (campus interview, walk-in interview, company interview), placement, entrance exam and other competitive examinations. Tel. a. Relive current circuit breaker . The miniature circuit breaker (MCB) with Class D trip characteristics trips instantaneously when the current flowing through it reaches ____ the rated current. It works on magnetic effect of electric current. Unlike fuses, which melt at 50% to 100% overload, MCBs break the circuit at just 5% to 15% overload and thus provide better safety. Switches: These are used to ON/OFF the power of . (d) decrease. Residual Current Circuit Breaker . Explanation: 9) What is the purpose of trip coil used in circuit breakers? MCB is used in place of a fuse and is like a resettable fuse. It is a mechanical device that disturbs the flow of high magnitude (fault) current and in additions performs the function of a switch. When two or more cells are joined together, it forms a (a) Dynamo (b) Battery (c) Radio (d) Transistor (b) Battery. Electrician MCQ 0. Q2. Answer is: Miniature circuit breaker. 42) Normal current capacity of a certain cable is 16 amperes.If the circuit is protected by the close excess current protection, then the current capacity of the cable will be : GUJARATI MCQ; MGVCL Exam Paper (30-07-2021 Shift 1) MGVCL Exam Paper (30-07-2021 Shift 1) A 16 A, Type B Miniature Circuit Breaker (MCB) will disconnect a fault in 0.1s when the fault current is less than 16 A greater than 32 A less than 16 A . a) Miniature circuit breaker b) Mini circuit breaker c) Miniature capacitor breaker d) Mini Capacitance breaker Answer: a Clarification: "MCB" stands for Miniature circuit breaker. Electrical Leakage Circuit Breaker. RCCB stands for . Miniature Circuit Breaker. 13. NT50 Series Safety Circuit Breaker. Circuit Breaker MCQ Question Answer. Limit switch Toggle switch Isolating switch Limit switch. MCT1-63 Series Din-rail Miniature Circuit Breaker. Overload b. Circuit Breakers MCQ Question 3 Detailed Solution Download Solution PDF Miniature Circuit Breaker: Miniature Circuit Breaker is used to protect the circuits from short circuit faults. Nowadays we use an MCB in a low voltage electrical network instead of a fuse. Automatically, MCBs are open the circuit during the short and fault occurs in the circuit or house wiring. Toggle switch . Get Ratings of Circuit Breakers Multiple Choice Questions (MCQ Quiz) with answers and detailed solutions. These MCQ Questions on Electric Current and Its Effects Class 7 with answers pave for a quick revision, thereby helping you learn more about this subject. Miniature circuit breaker (MCB) 1. (a) it is a non-toxic gas (b) it is non-inflammable (c) it has density 5 times that of air at 20 o C (d) it has dark yellow color. Download these Free Ratings of Circuit Breakers MCQ Quiz Pdf and prepare for your upcoming exams Like Banking, SSC, Railway, UPSC, State PSC. In a building, to provide. Bulletin 1489-M Thermal-magnetic Circuit Breakers are UL 489 Listed for branch circuit protection in the United States and Canada, and they are certified as Miniature Circuit Breakers for IEC applications. 20) Which one of the following is not applicable to MCB ? Fuses: A short length wire having low melting point, connected in series with circuit. Din-rail Miniature Circuit Breaker. Applications of Circuit Breakers - MCQs with answers Q1. The fuse may not sense it but the miniature circuit . Subject: Circuit Breakers and Relays 1 . 1. (D) to provide additional safety in the operation of circuit breaker. The oil is mainly used for the arc extinction process only. Que. 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