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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 51. |
Short circuit problem is severe in case of Voltage source inverter.(a) True(b) FalseI had been asked this question during an interview.I'd like to ask this question from Solid-State Switching Circuits in portion Introduction to Solid-State Switching Circuits of Electric Drives |
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| 52. |
Inverters are used to convert DC power into variable AC power.(a) True(b) FalseThe question was posed to me in examination.This question is from Solid-State Switching Circuits topic in chapter Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» RIGHT answer is (a) True Best EXPLANATION: Inverters are used to convert DC power into variable AC power. The variable AC power means variable frequency and variable voltage LEVEL. |
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| 53. |
Calculate the output voltage of the Boost converter if the supply voltage is 156 V and duty cycle value is .4.(a) 260 V(b) 264 V(c) 261 V(d) 268 VI have been asked this question in an interview for internship.This interesting question is from Solid-State Switching Circuits topic in section Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» Right answer is (a) 260 V |
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| 54. |
Calculate the average value of thyristor current in 3-Φ Full wave converter for the load current=27 A and α=6°.(a) 9 A(b) 4 A(c) 5 A(d) 9 AThe question was asked in exam.My question is taken from Solid-State Switching Circuits in division Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» The correct answer is (d) 9 A |
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| 55. |
Calculate the output voltage of the Buck converter if the supply voltage is 789 V and duty cycle value is .9.(a) 711.1 V(b) 710.1 V(c) 722.2 V(d) 713.2 VI have been asked this question in an online interview.My question is from Solid-State Switching Circuits in portion Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» Correct option is (b) 710.1 V |
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| 56. |
Calculate the value of Crest factor if Vpeak=0 V and Vr.m.s=24 V.(a) 0(b) 3(c) 5(d) 8This question was addressed to me in final exam.My doubt stems from Solid-State Switching Circuits topic in section Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» The CORRECT option is (a) 0 |
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| 57. |
Inductor and Capacitor in Buck converter are used to ___________(a) Increase the cost(b) Decrease the cost(c) Filter out the harmonics(d) Increase the harmonicsThis question was addressed to me in exam.This intriguing question comes from Solid-State Switching Circuits topic in division Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» CORRECT option is (c) FILTER out the harmonics The best I can explain: Inductor and capacitor in BUCK converter are used to filter out the harmonics. They remove the ripple from the output voltage. |
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| 58. |
Calculate peak-peak voltage if Vmax=1 V and Vmin=-1 V.(a) 6 V(b) 2 V(c) 3 V(d) 1 VThis question was addressed to me at a job interview.This intriguing question originated from Solid-State Switching Circuits in section Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» Correct CHOICE is (B) 2 V |
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| 59. |
Buck-Boost acts as Boost converter for duty cycle is equal to_________(a) .8(b) .1(c) .2(d) .4I got this question during an online interview.Origin of the question is Solid-State Switching Circuits topic in division Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» Right option is (a) .8 |
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| 60. |
Buck-Boost acts as Buck converter for duty cycle is equal to_________(a) .9(b) .7(c) .6(d) .4I have been asked this question by my school teacher while I was bunking the class.The query is from Solid-State Switching Circuits topic in division Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» CORRECT choice is (d) .4 The best explanation: The OUTPUT voltage of the buck-boost converter is Vo = D×Vin ÷ (1-D). It can step up and step down the voltage depending UPON the value of the duty cycle. If the value of the duty cycle is LESS than .5 it will work as a buck converter. The ANSWER is .4. |
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| 61. |
____________ is the boundary for C.C.M and D.C.M mode in 3-Φ Half wave bridge rectifier for R load.(a) 60°(b) 10°(c) 80°(d) 30°The question was asked by my school principal while I was bunking the class.Enquiry is from Solid-State Switching Circuits in portion Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» Correct answer is (d) 30° |
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| 62. |
What is the formula for output voltage for Boost converter?(a) 8D×Vin(b) 5D×Vin(c) 2D×Vin(d) D×VinThe question was posed to me in class test.This interesting question is from Solid-State Switching Circuits in chapter Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» Right CHOICE is (d) D×Vin |
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| 63. |
What is the formula for output voltage for Buck-Boost converter?(a) D×Vin(b) Vin ÷ (1-D)(c) D×Vin ÷ (1-D)(d) D×Vin ÷ (1+D)The question was asked by my college professor while I was bunking the class.My question is based upon Solid-State Switching Circuits topic in section Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» RIGHT choice is (C) D×Vin ÷ (1-D) The best EXPLANATION: The output voltage of the buck-BOOST converter is Vo = D×Vin ÷ (1-D). It can step up and step down the voltage depending UPON the value of the duty cycle. If the value of the duty cycle is less than .5 it will work as a buck converter and for duty cycle greater than .5 it will work as a boost converter. |
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| 64. |
What is the formula for output voltage for Buck converter?(a) 8D×Vin(b) 5D×Vin(c) 2D×Vin(d) D×VinThe question was asked in an interview for internship.This interesting question is from Solid-State Switching Circuits topic in division Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» The correct option is (d) D×Vin |
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| 65. |
Cuk-converter is better than Buck converter in terms of the output voltage.(a) True(b) FalseThe question was asked in exam.This is a very interesting question from Solid-State Switching Circuits topic in section Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» Right choice is (a) True |
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| 66. |
Which one of the following device is uncontrolled?(a) SCR(b) MOSFET(c) Diode(d) TRIACI have been asked this question in a job interview.My query is from Solid-State Switching Circuits topic in section Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» Right choice is (C) Diode |
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| 67. |
Choppers are used to control the DC voltage level.(a) True(b) FalseI got this question in an international level competition.The question is from Solid-State Switching Circuits topic in chapter Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» The correct choice is (a) True |
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| 68. |
Fifth lowest order harmonic present in 3-Φ fully controlled rectifier is __________(a) 15^th(b) 17^th(c) 13^th(d) 12^thThe question was asked in an online interview.This intriguing question originated from Solid-State Switching Circuits in section Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» Correct CHOICE is (b) 17^th |
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| 69. |
Which harmonic is not present in 3-Φ fully controlled rectifier?(a) 81st harmonic(b) 15^th harmonic(c) 17^th harmonic(d) 11^th harmonicI had been asked this question by my college director while I was bunking the class.The question is from Solid-State Switching Circuits topic in section Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» Right CHOICE is (a) 81st harmonic |
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| 70. |
Full form of DIAC is ___________(a) Digital Alternating current(b) Discrete Alternating current(c) Diode for Alternating current(d) Digital Alternating counterI have been asked this question by my school teacher while I was bunking the class.I want to ask this question from Solid-State Switching Circuits topic in portion Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» The correct answer is (C) Diode for ALTERNATING CURRENT |
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| 71. |
Calculate the compensator rating required for sin(Φ)=.13.(a) 0.45 P.U(b) 0.12 P.U(c) 0.13 P.U(d) 0.82 P.UI got this question during an interview.The above asked question is from Solid-State Switching Circuits topic in section Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» The correct option is (C) 0.13 P.U |
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| 72. |
Full form of MOSFET is ___________(a) Metal oxide silicon field effect transistor(b) Metal oxide semiconductor field effect transistor(c) Metal oxide settle field effect transistor(d) Metal oriented silicon field effect transistorThe question was posed to me in my homework.This intriguing question originated from Solid-State Switching Circuits in chapter Introduction to Solid-State Switching Circuits of Electric Drives |
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| 73. |
Calculate the De-rating factor if the string efficiency is 16 %.(a) .84(b) .44(c) .5(d) .6This question was addressed to me at a job interview.My question is from Solid-State Switching Circuits in chapter Introduction to Solid-State Switching Circuits of Electric Drives |
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| 74. |
Calculate the average value of thyristor current in 3-Φ Full wave converter for the load current=9 A and α=26°.(a) 4 A(b) 5 A(c) 7 A(d) 3 AI have been asked this question during an online interview.This intriguing question comes from Solid-State Switching Circuits topic in chapter Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» The CORRECT CHOICE is (d) 3 A |
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| 75. |
Calculate the r.m.s value of thyristor current in 3-Φ Full wave converter for the load current=4 A and α=12°.(a) 2.3 A(b) 2.5 A(c) 2.7 A(d) 2.9 AI got this question in unit test.I want to ask this question from Solid-State Switching Circuits topic in chapter Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» Correct option is (a) 2.3 A |
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| 76. |
What is the formula for output voltage for 3-Φ Full wave bridge rectifier for R load for α > 60°?(a) 2Vml(1+cos(∝+60°))÷π(b) 3Vml(1+cos(60°+∝))÷2π(c) 3Vml(1+cos(60°+∝))÷π(d) 6Vml(cos(∝))÷πThe question was posed to me during an interview.I want to ask this question from Solid-State Switching Circuits topic in chapter Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» RIGHT option is (C) 3Vml(1+cos(60°+∝))÷π For EXPLANATION: The output voltage of 3-Φ Full wave bridge rectifier for R load is 3Vml(1+cos(60°+∝))÷π for α > 60°. CONDUCTION will only remain from 60°+α to 180°. |
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| 77. |
____________ is the boundary for C.C.M and D.C.M mode in 3-Φ Full wave bridge rectifier for R load.(a) 60°(b) 10°(c) 80°(d) 50°I had been asked this question by my college professor while I was bunking the class.My doubt stems from Solid-State Switching Circuits in section Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» The correct answer is (a) 60° |
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| 78. |
What is the formula for output voltage for 3-Φ Full wave bridge rectifier for R load for α < 60°?(a) 2Vml(cos(∝))÷π(b) 3Vml(cos(∝))÷2π(c) 3Vml(cos(∝))÷π(d) 6Vml(cos(∝))÷πThe question was posed to me in an interview for job.My question comes from Solid-State Switching Circuits topic in section Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» Right choice is (C) 3Vml(cos(∝))÷π |
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| 79. |
The output voltage of 3-Φ Full wave bridge rectifier is six times of 3-Φ Half-wave rectifier.(a) True(b) FalseI got this question in my homework.The query is from Solid-State Switching Circuits topic in section Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» The CORRECT answer is (b) False |
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| 80. |
What is the formula for output voltage for 3-Φ Full wave bridge rectifier for R-L load?(a) 3Vml(cos(∝))÷2π(b) 3Vml(cos(∝))÷π(c) 2Vml(cos(∝))÷π(d) 6Vml(cos(∝))÷πThe question was asked by my school principal while I was bunking the class.This question is from Solid-State Switching Circuits in chapter Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» Correct ANSWER is (B) 3Vml(cos(∝))÷π |
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| 81. |
For α > 90°, 3-Φ Full wave bridge rectifier acts as a natural commutated inverter.(a) True(b) FalseThe question was posed to me by my college professor while I was bunking the class.Question is from Solid-State Switching Circuits in section Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» The correct CHOICE is (a) True |
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| 82. |
Full form of TRIAC is __________(a) Triode for Alternating current(b) Tri for Alternating current(c) Triode for Alternating counter(d) Tri for Alternating countersThis question was addressed to me in unit test.My question is from Solid-State Switching Circuits in section Introduction to Solid-State Switching Circuits of Electric Drives |
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| 83. |
Calculate the Vo(avg) for the 3-Φ phase Half-wave controlled rectifier if the supply value is 480 V and the value of firing angle is 92°.(a) 264.02 V(b) 487.26 V(c) 858.26 V(d) 248.25 VThe question was asked in final exam.My doubt is from Solid-State Switching Circuits topic in division Introduction to Solid-State Switching Circuits of Electric Drives |
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| 84. |
Calculate the circuit turn-off time for 3-Φ Fully controlled rectifier if the firing angle is 170° and supply frequency is 50.5 Hz.(a) 32.4 msec(b) 35.2 msec(c) 39.3 msec(d) 31.5 msecThis question was addressed to me in an internship interview.The origin of the question is Solid-State Switching Circuits in chapter Introduction to Solid-State Switching Circuits of Electric Drives |
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| 85. |
In 3-Φ Semi-controlled rectifier calculate the average value of the voltage if the supply is 299 V and firing angle is 56.15°.(a) 311.26 V(b) 304.26 V(c) 314.51 V(d) 312.45 VI had been asked this question in quiz.This is a very interesting question from Solid-State Switching Circuits topic in portion Introduction to Solid-State Switching Circuits of Electric Drives |
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| 86. |
Calculate the Vo(avg) for the 3-Φ phase Half-wave controlled rectifier if the supply value is 364 V and the value of firing angle is 2°.(a) 247.62 V(b) 245.76 V(c) 214.26 V(d) 233.26 VI got this question in a national level competition.This interesting question is from Solid-State Switching Circuits in chapter Introduction to Solid-State Switching Circuits of Electric Drives |
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| 87. |
Calculate the Vo(r.m.s) (Highly inductive load) for the 3-Φ phase Half-wave uncontrolled rectifier if the supply value is 441 V.(a) 297.25 V(b) 298.15 V(c) 298.11 V(d) 300.15 VThe question was asked in examination.My question is based upon Solid-State Switching Circuits topic in division Introduction to Solid-State Switching Circuits of Electric Drives |
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| 88. |
In 3-Φ Fully controlled rectifier calculate the average value of the voltage if the supply is 400 V and firing angle is 45°.(a) 381.15 V(b) 382.16 V(c) 383.19 V(d) 384.25 VThis question was addressed to me in class test.I would like to ask this question from Solid-State Switching Circuits in portion Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» The CORRECT option is (b) 382.16 V |
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| 89. |
Calculate the average value of current for the 3-Φ phase Half-wave uncontrolled rectifier if the supply value is 400 V and resistive load value is 5 Ω.(a) 54.04 A(b) 57.26 A(c) 51.64 A(d) 58.15 AI had been asked this question in an online interview.Question is from Solid-State Switching Circuits in portion Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» The CORRECT answer is (a) 54.04 A |
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| 90. |
Calculate the Vo(avg) for the 3-Φ phase Half-wave uncontrolled rectifier if the supply value is 440 V.(a) 297.25 V(b) 298.15 V(c) 298.11 V(d) 300.15 VThe question was asked by my college director while I was bunking the class.My doubt stems from Solid-State Switching Circuits in section Introduction to Solid-State Switching Circuits of Electric Drives |
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| 91. |
Calculate the output voltage of the Buck converter if the supply voltage is 13 V and duty cycle value is .16.(a) 2.08 V(b) 2.24 V(c) 2.58 V(d) 2.54 VThe question was asked at a job interview.Question is from Solid-State Switching Circuits topic in portion Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» Right answer is (a) 2.08 V |
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| 92. |
Calculate the value of the conduction angle for diode for R-L load with a freewheeling diode if the value of α is 45°. (Continous conduction mode)(a) 220°(b) 225°(c) 230°(d) 280°I had been asked this question during an interview.I would like to ask this question from Solid-State Switching Circuits in chapter Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» The CORRECT CHOICE is (B) 225° |
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| 93. |
Calculate the voltage across the freewheeling diode when the output voltage is 24 V.(a) -15 V(b) -24 V(c) 28 V(d) 39 VI got this question during an online exam.I need to ask this question from Solid-State Switching Circuits topic in chapter Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» Correct choice is (b) -24 V |
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| 94. |
Calculate the pulse number if the supply frequency is 2π and the output frequency is 2π÷3.(a) 4(b) 5(c) 6(d) 3I have been asked this question at a job interview.Question is taken from Solid-State Switching Circuits topic in portion Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» The CORRECT CHOICE is (d) 3 |
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| 95. |
Calculate the output voltage of the Buck converter if the supply voltage is 13 V and duty cycle value is .16.(a) 2.08 V(b) 2.24 V(c) 2.58 V(d) 2.54 VThe question was asked in homework.My query is from Solid-State Switching Circuits in section Introduction to Solid-State Switching Circuits of Electric Drives |
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| 96. |
d(v)÷d(t) is more reliable for SCR triggering.(a) True(b) FalseI had been asked this question at a job interview.My doubt stems from Solid-State Switching Circuits in chapter Introduction to Solid-State Switching Circuits of Electric Drives |
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| 97. |
70 V rated 6 SCRs are connected in series. The operation voltage of the string is 130. Calculate the De-rating factor.(a) .70(b) .73(c) .78(d) .74The question was asked during an online interview.Asked question is from Solid-State Switching Circuits topic in section Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» Correct option is (a) .70 |
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| 98. |
Calculate the string efficiency if the de-rating factor is .50.(a) 28 %(b) 42 %(c) 80 %(d) 50 %The question was asked in final exam.I want to ask this question from Solid-State Switching Circuits topic in chapter Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» Correct answer is (d) 50 % |
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| 99. |
Calculate the De-rating factor if the string efficiency is 98%.(a) .04(b) .02(c) .05(d) .03The question was posed to me in an interview for job.My question is based upon Solid-State Switching Circuits topic in chapter Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» The CORRECT option is (B) .02 |
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| 100. |
A step-down chopper has input voltage .1 V and output voltage .01 V. Calculate the value of the duty cycle.(a) 0.1(b) 0.2(c) 0.3(d) 0.5The question was asked in an interview.I want to ask this question from Solid-State Switching Circuits in section Introduction to Solid-State Switching Circuits of Electric Drives |
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Answer» RIGHT option is (a) 0.1 The best EXPLANATION: The output VOLTAGE of the step-down chopper is Vo = Vin×(D). The value of the duty cycle is less than one which MAKES the Vo < Vin. The step-down chopper is used to step down the voltage. The value of the duty cycle is .01÷.1=.1. |
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