Shell Type Transformer Question & AnswersMarch 8, 2023 By Wat Electrical This article lists 100 Shell Type Transformer MCQs for engineering students. All the Shell Type 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 Shell Type Transformer.An electrical device that is designed to transfer power between the circuit within is a transformer. This device works on the principle of electromagnetic induction maintaining the frequency constant. Transformer designs are of 2 types namely core type and shell type. In a core type, the winding is surrounded around the core and the core parts include 2-limbs and 2-yokes. Whereas in shell type/ rectangular type, the transformer core is surrounded around windings and the core parts of a shell type transformer include 3-limbs and 2yokes.Iron core transformer losses are minimized in a shell-type transformer. The insulated substance of the shell-type transformer is paper. The disadvantage of the shell-type transformer includes difficulty in cooling and maintenance. The advantages of shell-type transformers include zero leakage, a perfect short circuit, and a good cooling system.A shell-type transformer is applicable for low voltage and high output types of appliances. 1). Which of the following is the unit rating of shell type transformer? up to 1300 MVA up to 1200 MVA up to 1100MVA up to 1000MVA None Hint2). Which of the following is the primary voltage range of shell type transformer? up to 1300 kV up to 765 kV up to 1100 kV up to 1000 kV None Hint3). A transformer is a ___ type of device? Electric Electronic Mechanic Chemical None Hint4). Which of the following is the function of a transformer? Power transfer Voltage transfer Resistance transfer Both a and b None Hint5). Which of the following is the function of a transformer? Electromagnetic induction Electric flux Magnetic induction Magnetic flux None Hint6). Which of the following are the types of transformers? Core Shell Coil Both a and b None Hint7). Which of the following are the core parts of a core type transformer? 2-limbs, 2-yokes 3-limbs, 2yokes 3-limbs, 3yokes 2-limbs, 3yokes None Hint8). Which of the following are the core parts of a shell type transformer? 2-limbs, 2-yokes 3-limbs, 2yokes 3-limbs, 3yokes 2-limbs, 3yokes None Hint9). Which of the following is the shape shell type transformer? Rectangular Square Cylindrical Hexagonal None Hint10). Identify the components of shell type transformer? 1 core 2 Windings Load All the above None Hint11). What is the transformers voltage transformation ratio? E2 / N2 = E1 * N1 E1 * N1 = E2 / N2 E1 / N1 = E2 / N2 E2 *N2 = E1 * N1 None Hint12). What is the formula for efficiency of the transformer? Transformer efficiency = output current /input current * turns ratio Transformer efficiency = output voltage /input voltage * turns ratio Transformer efficiency = input voltage /output voltage * turns ratio Both a and b None Hint13). Find the primary voltage of a transformer when primary & secondary winding is 90 and 120 with a secondary voltage 310 V? 220 V 230V 225V 232V None Hint14). Calculate transformers secondary voltage; when primary and secondary windings is 110 and 240, and primary voltage is 300V? 600V 650 V 700 V 750 V None Hint15). What is the transformer ratio formula for voltage is? K = V1 * V2 K=V2/V1 K = V1/V2 K = I2/I1 None Hint16). What is the transformer ratio formula for current is? K = I1 * I2 K= I2/I1 K = I1/I2 K = I1 None Hint17). What is the representation of efficiency of transformer? η ∂ µ π None Hint18). Find the primary current drawn in the transformer when the efficiency of the transformer is 75% and which works on 100 V, 5 kVA and the secondary voltage is 200V. 150 A 100 A 50A 200 A None Hint19). What is the value of 1kVA? 2,500 volt-amperes 2,000 volt-amperes 1,500 volt-amperes 1,000 volt-amperes None Hint20). What is the formula of step-up transformer? Vs = Np/Ns x Vp Vs = Ns/Np x Vp Vp = Ns/Np x Vs Vs = Ns/Np None Hint21). What is transformer efficiency in %? Efficiency = (Power i/p – Losses) / Power i/p Efficiency = (Power i/p + Losses) / Power i/p × 100 Efficiency = (Power i/p – Losses) × 100 Efficiency = (Power i/p – Losses) / Power i/p × 100 None Hint22). A shell type transformer is applicable for ___ type of appliances? Low voltage High output Low current Both a and b None Hint23). What is the Rms value of emf induce in windings of a transformer? RMS value of emf per turn / number of turns Number of turns RMS value of emf per turn RMS value of emf per turn = Form factor x average emf per turn None Hint24). What is transformer ratio? Number of turns in the primary type coil to the number of turns in the secondary type coil Number of turns in the secondary type coil to the number of turns in the primary type coil Number of turns in the secondary type coil Number of turns in the primary type coil None Hint25). What is the value of form factor of sinewave? 0.11 0.55 1.11 1.55 None HintShell Type Transformer MCQs for Students26). What is formula of Form factor? Average value/rms value Rms value / average value Rms value Average value None Hint27). Which of the following is the insulated substance of shell type transformer? Paper Oil Greece Wood None Hint28). What is the rms value of induced emf in primary windings, E1in a transformer? 4.44 f Φm / N1 4.44 f Φm * N2 4.44 f Φm * N1 4.44 f Φm / N2 None Hint29). A transformer has a primary coil with 1600 loops and a secondary coil with 1000 loops. If the current in the primary coil is 6 Ampere, then what is the current in the secondary coil. 4.6 Ampere 6.4 Ampere 4.5 Ampere 5.4 Ampere None Hint30) Which is the disadvantage of shell type transformer? Cooling Maintenance Mechanical strength Both a and b None Hint31). Which of the following is the cooling system used in shell type transformer? Forced air Water Gel All the above None Hint32). In which of the following components of shell type transformer does the forced air is placed? Limbs Yoke Load Both a and b None Hint33). Which portion of 3-limb of a shell type transformer holds complete flux? Left Middle Right Both a and b None Hint34). Which of the following are the advantages of shell type transformer? Zero leakage Perfect short circuit Good cooling system All the above None Hint35). Which of the following windings types are sandwiched between shell type transformer? HV with LV LV with HV LV with LV HV with HV None Hint36). Which of the following types of losses are minimized in a shell type transformer? Iron core losses Copper losses Flux losses All the above None HintRead more about Transformer Losses37). Which of the following are the mechanism of iron core losses? Hysteresis Eddy current Eddy voltage Both a and b None HintRead more about Hysteresis Losses38). In which of the following leg of shell type transformer the 2 coils are twisted? Left Middle Right Both a and c None Hint39). A transformer consist of ____ number primary circuit? 1 2 3 4 None Hint40). A transformer consist of ____ number secondary circuit? 1 2 3 4 None Hint41). Which of the following is the equation of faradays law? E=N d pi/dt E=-N d pi/dt E=N E= d pi/dt None Hint42). EMF is also called? Electromagnetic Magnetic Induction Electric induction Both a and b None Hint43). Which of the following is the SI units or Flux density? Weber/m2 Weber/cm2 Weber cm/Weber None Hint44). Which of the following are the applications of electro magnetic induction? Transformer Inductor Generator All the above None Hint45). When conductor move via a steady type magnetic field bounded in a varying magnetic field having circular shaped currents induced in them due to induction is? Eddy current Core Magnetic flux Flux density None Hint46). Eddy current is also called? Foucault current Farad current Transfer current Magnetic current None Hint47). Eddy current flows in ____ type of circuit? Open Closed Short Both b and c None Hint48). Which of the following type of electric source supplies energy to other connected components? Active Passive Both a and b Dependent device None Hint49). Which of the following type of electric source receives energy to operate? Active Passive Dependent device Both c and b None Hint50). Which of the following are the examples of active components? Voltage sources Current sources Diodes All the above None HintShell Type Transformer Questions for Interviews51). Which are the examples of transistors that generate power? FET JFET BJT All the above None Hint52). Which of the following is a form of voltage source? Battery Amplifier Diode Generator None Hint53). Which of the following are the generator types? Alternators DC generators AC generators All the above None Hint54). A transistors ___ the signal? Amplifies Clamps Clips Shifts None Hint55). A passive component ___ the power? Dissipate Absorb Store All the above None Hint56). Which of the following are non-function of passive components? Oscillate Amplify Generate All the above None Hint57). Which of the following is the function of a resistor? Dissipates heat Oppose current flow Absorbs energy All the above None Hint58). A inductor stores energy in _____ field? Electric Magnetic Chemical Liquid None Hint59). Which of the following qualities of inductor are limited? Energy absorbing Energy delivering Transient All the above None Hint60). Which of the following component stores electric energy? Resistor Capacitor Inductor Transistor None HintRead more about Capacitor Types.61). Step up means _____ quantity of voltage flow in a transformer? High Low Constant Zero None Hint62). Step down means _____ quantity of voltage flow in a transformer? High Low Constant Zero None Hint63). Which of the following is the centre portion of a transformer? Core Primary winding Secondary winding All the above None Hint64). A supply to the transformer is given at ____ winding end? Primary winding Secondary winding Core Both a and b None Hint65). A load on to the transformer is added at ____ winding end? Primary winding Secondary winding Core Both a and b None Hint66). What is the value of voltage on secondary windings when turns ratio is high? High Low Zero Constant None Hint67). In which of the following transformer type does core is surrounded around windings? Core Shell Step down Step up None Hint68). In which of the following transformer type does winding is surrounded around core? Core Shell Step down Step up None HintRead more about Core type transformer69). In how phase a shell type transformer is constructed? 1-P 2-P 3-P Both a and c None Hint70). Which of the following transformer type has natural cooling? Core Shell Step up Step down None Hint71). Which of the following is higher in shell type transformer? Mechanical strength Electrical strength Chemical strength Electronic strength None Hint72). Which of the following are the substances used for transformer windings? Iron Copper Aluminium Both a and b None Hint73). Which of the following are the substances used in transformer laminations? Steel Silicon Iron Both a and b None Hint74). Which of the following are the substances of transformer core? Iron Amorphous metals Ferrite ceramics All the above None Hint75). Which of the following are the voltage level based transformers? Step-up Step-down Air core Both a and b None HintTransformer Types MCQs for Exams76). Which of the following are the core level based transformers? Step-up Step-down Air core Both a and b None Hint77). Which of the following are the windings based transformer? Two windings Auto transformer Power transformer Both a and b None Hint78). Which of the following are the usage based transformer? Two windings Auto transformer Power transformer Both a and b None Hint79). Which of the following are current type transformer? Wound Toroidal Bar All the above None Hint80). In a wound type current transformer the primary winding is connected in ______ via conductor? Series Parallel Concurrent Both a and b None Hint81). Which of the following current type transformer doesnot have primary winding? Toroidal Bar type Wound Protection None Hint82). Which of the following parameters are used to calculate current based transformer? Current ratio Phase relation Accuracy All the above None Hint83). Which of the following are the function of toroidal current type transformer? Open Close Install network. All the above None Hint84). Which of the following are the advantages of Bar type current transformer? Protects from high voltages Uses real cables for connectivity Alternatively use bus bar All the above None Hint85). Which of the following are the ways to construct 3-phase type transformer? Bridging 3 single phase transformers A pre-assembler with a balanced 3 phase type transformer 2 single phase and half bridge transformer Both a and b None Hint86). In 3-phase transformer the connection configuration can be made is? Star Delta Zig-zag All the above None Hint87). A transformer with more than 3 phases is called? Single phase Dual phase Tri phase Poly phase None Hint88). A star configuration is also called? Wye Mesh Y Both a and c None Hint89). A Delta configuration is also called? Wye Mesh Y Both a and c None Hint90). Which of the following are the standard type configurations to connect transformer? Delta-Delta Star-Star Star-Delta All the above None Hint91). Which of the following is the representation of delta-delta configuration of primary & secondary winding? Dd dD yY Yy None Hint92). Which of the following is the representation of Star-Star configuration of primary & secondary winding? Dd dD yY Yy None Hint93). Which of the following is the representation of Star-Delta configuration of primary & secondary winding? Dd dD yY Yd None Hint94). Which of the following is the representation of Delta- Star configuration of primary & secondary winding? Dy dD yY Yd None Hint95). Which of the following is the phase voltage formula of a 3 phase star transformer? Vp = VL / sqr[3] VL = sqrt(3) * Vp Vp = VL VL = Vp None Hint96). Which of the following is the line voltage formula of a 3 phase star transformer? Vp = VL / sqr[3] VL = sqrt(3) * Vp Vp = VL VL = Vp None HintRead more about Difference between single and three phase97). Which of the following is the phase voltage formula of a 3 phase delta transformer? Vp = VL / sqr[3] VL = sqrt(3) * Vp Vp = VL VL = Vp None Hint98). Which of the following is the line voltage formula of a 3 phase delta transformer? Vp = VL / sqr[3] VL = sqrt(3) * Vp Vp = VL Vp = VL None Hint99). Which of the following are the advantages of delta-delta configuration? Minimum voltage is required Less area No third harmonic voltage All the above None Hint100). A transformer is ____ directional based device? Intelligence Bi directional Multi directional Uni directional None HintFor More MCQsTransformer MCQsSemiconductor Diode MCQsTransistors MCQsDC generator MCQsFET MCQsElectrical Conductor MCQsElectromagnetic Induction MCQs Time's up
