Transformer Question & AnswersJanuary 30, 2023 By Wat Electrical This article lists 100 Transformer MCQs for engineering students. All the Transformer Questions & Answers given below include a hint and a link wherever possible to the relevant topic. This is helpful for users who are preparing for their exams, interviews, or professionals who would like to brush up on the fundamentals of Transformer.Simply, the transformer is described as a device that steps the voltages up or down. If the transformer designed is to step-up the voltages are raised and for step-down voltage, the outcome is decreased. Similarly, the current obtained at the output of step-up is decreased and for step-down, it is increased. Transformers are voltage-controlled devices. It is utilized widely in the transmission and distribution of AC power. Michael Faraday was the first person to discuss transformers in 1831. The basic ideology behind the invention of the transformer is to balance the generated electricity for higher voltages.The change in voltages supplied in transformers does not affect the frequencies. Mutual induction & Electromagnetic induction are the basic principles of the transformer. Mainly transformers are utilized for the transmission of electric energies during the transmission of power.Transformers are utilized in distinct fields like distribution section, electric, and transmission consumption of energies. Transformers are categorized depending upon various factors they are voltage working ranges, medium inside the core, arrangement of windings, and location of installation. 1). Electric energy transferred from an AC circuit to the other circuits through __________? Transformer Rectifier Resonator Filter None Hint2). What raises the voltages from the electric generators? Transformer Rectifier Resonator Filter None HintRead More about Transformer 3). What changes voltage via Electromagnetic induction? Transformer Rectifier Resonator Filter None Hint4). Transformer is a __________ device? Current Controlled Voltage Controlled Temperature Controlled Magnetic Field Controlled None Hint5). Who is the first person to discuss the idea of a transformer? William Stanley Thomas Edison Michael Faraday K.L Baird None Hint6). What is the principle involved in transformer? Mutual Induction Thumb Rule Self Induction a & b None Hint7). Copper loss in transformers is dependent on _________? Voltage Current Temperature Magnetic Flux None Hint8). Transformer loss of heat is dependent on ______? Voltage Current Phase Angle a & b None Hint9). The current flow is in one coil and the voltage induced in the second coil is __________? Mutual Induction Thumb Rule Self Induction a & b None Hint10). __________ pass AC by involving the principle of Electro-magnetic Induction? Transformer Rectifier Resonator Filter None Hint11). What tests the winding integrity in the transformer? UV Test IR Test Turns Ratio Test Resistance Testing None Hint12). What is known as the Megger test? UV Test IR Test Turns Ratio Test Resistance Testing None Hint13). Silica used to control the excess moisture in _________? Transformer Rectifier Resonator Filter None Hint14). Which test in the transformer tests the winding ratios of the primary & secondary alignment of coils? UV Test IR Test Turns Ratio Test Resistance Testing None Hint15). If the primary turns in a transformer are 100 with the secondary 10 turns. By what factor the voltage is reduced? 5 10 15 100 None Hint16). Insulation of transformer must have a greater value of resistance to pass _____________? UV Test IR Test Turns Ratio Test Resistance Testing None Hint17). What tests the insulation systems' power losses in the transformer? Power Factor Test IR Test Turns Ratio Test Resistance Testing None Hint18). What should be the current's angle to pass the Power-factor test in the transformer? 0 45 90 180 None Hint19). Malfunctioning of insulation in the transformer is detected by ___________ test? Power Factor Test IR Test Turns Ratio Test Resistance Testing None Hint20). What are the various transformers based on the phases? Single-phase Transformer Double-Phase Transformer Three-phase Transformer a & c None Hint21). Based on function,the transformers are __________? Step-up Transformer Step-down Transformer Up-down Transformer a & b None Hint22). Which testing in the transformer ensures the wired circuits are correctly connected or not? Power Factor Test IR Test Turns Ratio Test Resistance Testing None Hint23). Which test is conducted by Ohmmeter? Power Factor Test IR Test Turns Ratio Test Resistance Testing None Hint24). What are the tests performed by the manufacturer of the transformer? Type Test Routine Test IR Test a & b None Hint25). What are the various transformers classified according to usage? Power Transformer Distribution Transformer Isolation Transformer All Mentioned Above None HintTransformer MCQs for Students26). What are the tests performed on the transformer at factories? Type Test Routine Test Special Test All Mentioned Above None Hint27). Which test on the transformer confirms the basic criteria of production? Type Test Routine Test Special Test All Mentioned Above None Hint28). Which test in the transformer confirms operational performance? Type Test Routine Test Special Test All Mentioned Above None Hint29). Before commissioning the tests performed on the transformer are _________? Type Test Routine Test Special Test Pre-commissioning Test None Hint30). What are the various transformers classified based on their core? Core-type Transformers Shell-type Transformers Berry-type Transformers All Mentioned Above None Hint31). Transformer Ratio test is ______________ of transformers? Type Test Routine Test Special Test a & b None Hint32). Which test in the transformer depends on the perfection of turns? Power Factor Test IR Test Transformer Ratio Test Resistance Testing None Hint33). Which test is conducted on the three-phase type transformers? Power Factor Test IR Test Turns Ratio Test Magnetic Balance Test None Hint34). Which test in the transformer detects the defect in the structure of magnetic cores? Power Factor Test Magnetizing Current Test Turns Ratio Test Resistance Testing None Hint35). Which test was performed before measuring DC resistances? Power Factor Test Magnetizing Current Test Turns Ratio Test Resistance Testing None Hint36). Properly grouped vectors are essential for ______________ of transformers? Series Operation Parallel Operation a & b None None Hint37). Transformer with similar vector grounds have _________? Same Phase Sequence Same Phase Divergence a &b Distinct Phase Divergence None Hint38). Dielectric tests are the type of _______ tests? Power Factor Test IR Test Transformer Ratio Test Resistance Testing None Hint39). What are the tests that check the transformer's insulation? Lightning Impulse Test Switching Impulse Test Partial Discharge Test All Mentioned Above None Hint40). Temperature rise tests in the transformer are included in _______? Type Test Routine Test Special Test Pre-commissioning Test None Hint41). Which test results are varied based on the temperature of the insulation? Power Factor Test IR Test Transformer Ratio Test Resistance Testing None Hint42). Essential type of test is ________? Power Factor Test IR Test Transformer Ratio Test Resistance Testing None Hint43). What is measured using insulation values of resistance? Indirect Current Direct Current Direct Voltage Indirect Voltage None Hint44). What is CT? Common Transformer Current Transformer Continuous Transformer Communication Transformer None Hint45). What is PT? Public Transformer Potential Transformer Pollution Transformer Pulling Transformer None Hint46). What are voltage transformers? Current Transformer Potential Transformer Public Transformer a & b None Hint47). Which transformer lowers the signals of current? Current Transformer Potential Transformer Public Transformer a & b None Hint48). What are Potential Transformers? Step-down Voltage Step-up Current Step-up Voltage a & b None Hint49). What are Current Transformers? Step-down Voltage Step-down Current Step-up Voltage b & c None Hint50). Which transformer has fewer turns in the winding i.e., primary? Current Transformer Potential Transformer Public Transformer Continuous Transformer None HintTransformer MCQs for Exams51). Wound type transformer belongs to _________? Current Transformer Potential Transformer Public Transformer Continuous Transformer None Hint52). Primary winding carries higher currents in __________? Current Transformer Potential Transformer Public Transformer Continuous Transformer None Hint53). Which transformer has the conductor thin for primary windings? Current Transformer Potential Transformer Public Transformer Continuous Transformer None Hint54). Which has a higher ratio of transformation? Current Transformer Potential Transformer Public Transformer Continuous Transformer None Hint55). Primary winding and the power lines connected in the series format in _________? Current Transformer Potential Transformer Public Transformer Continuous Transformer None Hint56). Toroidal transformer belongs to __________? Current Transformer Potential Transformer Public Transformer Continuous Transformer None Hint57). How many types does a PT have? Four Three Two One None Hint58). How many cylinders does a Core-type transformer have? Four Three Two One None Hint59). Cylindrical coils placed on cylinders in __________? Core-type Transformers Shell-type Transformers Berry-type Transformers All Mentioned Above None Hint60). What does a shell-type transformer consist of? Center Cylinder Two Inner Cylinders Two Outer Cylinders a & c None Hint61). Which transformer contains Dual magnetic circuitry? Core-type Transformers Shell-type Transformers Berry-type Transformers All Mentioned Above None Hint62). Which transformer has magnetic circuitry resemblance to a Wheel? Core-type Transformers Shell-type Transformers Berry-type Transformers All Mentioned Above None Hint63). Secondary has more turns compared to primary in ___________? Core-type Transformers Step-up Transformer Step-down Transformers Berry-type Transformer None Hint64). What reduces the output voltages? Core-type Transformers Step-up Transformer Step-down Transformers Berry-type Transformer None Hint65). Secondary has fewer turns compared to primary in ___________? Core-type Transformers Step-up Transformer Step-down Transformers Berry-type Transformer None Hint66). Which transformer is known as a Consumption transformer? Current Transformer Potential Transformer Power Transformer Distribution Transformer None Hint67). Which transformer has 100% efficiency? Current Transformer Potential Transformer Power Transformer Continuous Transformer None Hint68). Voltage regulation is good in ____________? Current Transformer Potential Transformer Power Transformer Distribution Transformer None Hint69). The primary & secondary windings are independent in ____________? Current Transformer Potential Transformer Power Transformer Isolation Transformer None Hint70). At two points of secondary windings voltage will be _________ in the Isolation transformer? Same Distinct Constant No Change None Hint71). Instrument transformer is ___________? Current Transformer Potential Transformer Power Transformer Isolation Transformer None Hint72). What isolates the primary from secondary windings? Current Transformer Potential Transformer Power Transformer Instrument Transformer None Hint73). What is the transformer categorized based on windings? Two-winding Transformer One-winding Transformer Auto-transformer a & c None Hint74). Turns are fixed in ___________? Two-winding Transformer One-winding Transformer Auto-transformer a & c None Hint75). Primary & Secondary windings are not insulated electrically in ________? Two-winding Transformer One-winding Transformer Auto-transformer a & c None HintTransformer MCQs for Interviews76). Which transformer does not have any liquid insulation? Two-winding Transformer Oil Type Transformer Auto-transformer Dry Type Transformer None Hint77). What are the transformers classified depending on the insulation present? Two-winding Transformer Oil Type Transformer Dry Type Transformer b & c None Hint78). Cast Resin Transformer belongs to the category of ___________? Two-winding Transformer Oil Type Transformer Auto-transformer Dry Type Transformer None Hint79). What is VPI Transformer? Vacuum Pressure Impregnated Volume Pressure Implemented Volume Physical Innovation Vacuum Polygamy Inclination None Hint80). Which transformer uses the method of oil cooling for reducing temperature? Two-winding Transformer Oil Type Transformer Auto-transformer Dry Type Transformer None Hint81). Immersed natural and forced cooling air transformers to belong to ___________? Two-winding Transformer Oil Type Transformer Auto-transformer Dry Type Transformer None Hint82). Single-phase transformers are generally used as _________? Core-type Transformers Step-up Transformer Step-down Transformers Berry-type Transformer None Hint83). How many sets of winding are present in Three-phase transformers? Four Three Two One None Hint84). Why the transformer has laminated iron cores? To Reduce Voltage To Reduce Temperature To Reduce Efficiency To Reduce Eddy Currents None Hint85). Which transformers are capable of transferring Radio-frequency currents? Air Core-type Transformers Step-up Transformer Step-down Transformers Berry-type Transformer None Hint86). What matches the impedance of the source with the load? Core-type Transformers Step-up Transformer Step-down Transformers Impedance Matching Transformer None Hint87). What is used as Voltage Regulators? Transformer Rectifier Resonator Filter None Hint88). What transforms high currents? Current Transformer Potential Transformer Power Transformer Isolation Transformer None Hint89). Electricity is measured using ___________? Current Transformer Potential Transformer Power Transformer Isolation Transformer None Hint90). Electric leakage risk is reduced in ______________? Current Transformer Potential Transformer Power Transformer Isolation Transformer None Hint91). Which transformers are used for the home appliance? Current Transformer Potential Transformer Power Transformer Distribution Transformer None Hint92). Which transformer is known as a higher-capacity transformer? Current Transformer Potential Transformer Power Transformer Continuous Transformer None Hint93). Higher voltages of transmission network use __________? Current Transformer Potential Transformer Power Transformer Continuous Transformer None Hint94). Generating station use ____________? Core-type Transformers Step-up Transformer Step-down Transformers Berry-type Transformer None Hint95). What is the secondary rating of the wiring of CT? 1 A 2 A 5 A a or c None Hint96). ___________ is independent of burden? Current Transformer Potential Transformer Public Transformer Continuous Transformer None Hint97). What measures voltages in electric lines of power? Current Transformer Potential Transformer Public Transformer Continuous Transformer None Hint98). Relays & contactors are operated using _________? Current Transformer Potential Transformer Public Transformer Continuous Transformer None Hint99). Why test a transformer? Check Functioning Decrease Failure Chances Increase Failure Rate a & b None Hint100). To transmit the power for a longer distance _________ is used? Transformer Rectifier Resonator Filter None HintFor More MCQsSingle Phase Transformer Question & Answers Time's up
