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Latest Maha Metro Technician Exam Question (Objective Questions), MCQ in English
Subjects : General Awareness, Logical Ability, Quantitative Aptitude, Electrical
Question Bank Maha Metro Technician Exam (Electrical) - English
General Awareness
Q 1 :
खोजे गए जमीन में गड्ढा खोदने वाले एक मेढ़क का नाम किस शहर के नाम पर रखा गया हैं ?
A. बेंगलुरू
B. पुणे
C. चेन्नई
D. दिल्ली
Q 2 :
निम्न में से किस राज्य की बीजेपी पार्टी की नेता किरण माहेष्वरी का निधन हो गया हैं ?
A. महाराष्ट्र
B. राजस्थान
C. गुजरात
D. दिल्ली
Q 3 :
कीथ गोम्स की किस लघु फिल्म को ऑस्कर्स 2021 के लिए भारत की लघु फिल्म श्रेणी की आधिकारिक प्रविष्टि किया गया हैं ?
A. जैक्सन
B. शेमलेस
C. डस्टर
D. मेस्ट्रो
Q 4 :
भारत की प्रथम महिला क्रिकेट अम्पायर कौन है ?
A. जितू राय
B. दीपिका पादुकोने
C. अंजलि राजगोपाल
D. साक्षी मलिक
Q 5 :
1 दिसंबर को विश्व में कौनसा दिवस मनाया जाता हैं ?
A. विश्व टीवी दिवस
B. विश्व वायरस दिवस
C. विश्व एड्स दिवस
D. विश्व कोरोना वायरस दिवस
Logical Ability
Q 6 :
नीचे दिये जा रहे अक्षर समूह की श्रृंखला में प्रश्न चिन्ह (?) के स्थान पर क्या होगा ?
I L J M P N Q T R ?
A. V X W
B. U Y V
C. U W V
D. U V Y
E. U X V
Q 7 :
कलम : लेखक : : ..... : बल्लेबाज
A. ब्रश
B. सेनानी
C. स्टिक
D. बल्ला
Q 8 :
नीचे दिए गए अक्षर अनुक्रम में आगे क्या आएगा?
A A B A B C A B C D A B C D E A B C D E F A B
A. D
B. E
C. G
D. C
E. F
Q 9 :
बावर्ची: रेस्टोरेंट :: ड्रगिस्ट : ?
A. दवा
B. फार्मेसी
C. स्टोर
D. केमिस्ट
Q 10 :
निम्नलिखित अंक श्रृंखला में अगली संख्या क्या होगी?
2, 23, 234, 2345, 23456, 23456, ?
A. 2
B. 7
C. 8
D. 3
E. इनमें से कोई नहीं
Q 11 :
प्रत्येक अक्षर का केवल एक बार प्रयोग करते हुए अक्षरों से कितने अर्थपूर्ण शब्द बनाए जा सकते हैं |
A. कोई नहीं
B. एक
C. तीन
D. तीन से अधिक
Q 12 :
निम्नलिखित जोड़े में से किसमें Run : Race की तरह का संबंध है?
A. Party : Dance
B. Study : Book
C. Lecture : Study
D. Enjoy : Journey
E. इनमें से कोई नहीं
Q 13 :
निम्न में से किसमें है वैसा ही संबंध है, जैसे कि आग : धूम्रपान में है ?
A. चोरी : चोर
B. किनारा : समुद्र
C. गायन : ध्वनि
D. प्यास : जल
E. कुँआ : जल
Q 14 :
शब्द BREAK के केवल व्यंजनों को अंग्रेजी वर्णमाला के अग्रणी अक्षर द्वारा प्रतिस्थापित कर और स्वरों को यथास्थिति रखकर कितने अर्थपूर्ण शब्द बनाए जा सकते हैं ?
A. कोई नहीं
B. SCALE
C. तीन
D. एक
E. तीन से अधिक
Q 15 :
निम्नलिखित पाँच में से चार किसी न किसी प्रकार से समान हैं उसका एक समूह बनता है। वह एक कौनसा है जो इस समूह में नहीं आता है ?
A. 143
B. 63
C. 195
D. 15
E. 257
Q 16 :
यदि किसी कूट भाषा में COULD को BNTKC और MARGIN को LZQFHM लिखा जाता है, तो उसी कूट भाषा में MOLDING को कैसे लिखा जाएगा ?
A. CHMFINTK
B. NITKHCMF
C. LNKTCHMF
D. LNTKCHMF
Q 17 :
यदि किसी सांकेतिक भाषा में '358' का अर्थ 'Please come soon', '275' का अर्थ, और '867' का अर्थ, 'Please go there' हो, तो इस भाषा में 'Come' के लिए कौन - सी संख्या प्रयुक्त की गयी है ?
A. 3
B. 5
C. 8
D. 7
Q 18 :
एक निश्चित कूट भाषा में TRIPPLE को SQHOOKD लिखा जाता है। उसी कोड में DISPOSE को कैसे लिखा जाता है ?
A. DSOESPI
B. ESJTPTF
C. ESOPSID
D. CHRONRD
Q 19 :
शब्द ORIENTAL में अक्षरों के ऐसे कितने जोड़े हैं जिनके बीच उतने अक्षर हैं जितने अंग्रेजी वर्णमाला में उनके बीच होते हैं?
A. कोई नहीं
B. एक
C. दो
D. तीन
E. तीन से अधिक
Q 20 :
निम्नलिखित पाँच में से चार किसी प्रकार से समान है और उनका एक समूह बनता है। वह एक कौन-सा है जो इस समूह में नहीं आता है?
A. अगस्त
B. दिसम्बर
C. जुलाई
D. जनवरी
E. मई
Quantitative Aptitude
Q 21 :
0, 3, 4, 5 और 8 अंकों से बनने वाली 5 अंकों की बडी से बडी संख्या तथा छोटी संख्या का अन्तर क्या होगा ?
A. 54972
B. 54922
C. 59952
D. 59942
Q 22 :
5 लोकेट तथा 8 जंजीरों का कुल मूल्य रु 145785 हो तो ऐसे 15 लोकेट तथा 24 जंजीरों का मूल्य कितना होगा ?
A. रु 325285
B. रु 439355
C. रु 550000
D. रु 437355
Q 23 :
एक दिन में 4 घंटे काम करके 5 दिनों में काम पूरा कर सकता है और उसी काम को 4 घंटे प्रतिदिन काम करके 5 दिनों में पूरा कर सकता है। यदि दोनों एक साथ 8 घंटे प्रतिदिन कार्य करते हैं, तो कार्य को पूरा करने में कितने दिन लगेंगे ?
A. 10
B. 1 2/8
C. 1 8/2
D. 1
E. इनमें से कोई नहीं
Q 24 :
825 रुपये के ऋण को तीन वर्षों में 10% की दर से निपटाने के लिए, प्रत्येक किश्त में कितनी राशि का भुगतान किया जाना चाहिए ?
A. 225 रुपये
B. 200 रुपये
C. 190 रुपये
D. 212 रुपये
E. 250 रुपये
Q 25 :
251 गुणा 176 कितना होगा ?
A. 44000
B. 43925
C. 44176
D. 44352
E. इनमें से कोई नहीं
Q 26 :
4400 को पूर्ण वर्ग बनाने के लिए उसमें न्यूनतम कौन-सी संख्या जोड़ी जानी चाहिए ?
A. 87
B. 91
C. 93
D. 89
E. इनमें से कोई नहीं
Q 27 :
605/55 ÷ 24/2208 × 147/161 = ?
A. 940
B. 960
C. 924
D. 1260
E. 1040
Q 28 :
एक द्विअंकीय संख्या और इस संख्या के दोनों अंकों को परस्पर बदलने के बाद प्राप्त संख्या के बीच का अंतर 27 है। इस द्विअंकीय संख्या के दोनों अंकों का योग 15 है। यह द्विअंकीय संख्या क्या है ?
A. 87
B. 96
C. 69
D. निर्धारिंत नहीं किया जा सकता
E. इनमें से कोई नहीं
Q 29 :
8115 को पूर्ण वर्ग बनाने के लिए इसमें कौन-सी न्यूनतम संख्या जोड़ी जानी चाहिए ?
A. 349
B. 166
C. 144
D. 194
E. इनमें से कोई नहीं
Q 30 :
7 6/3 of 7.2 ÷ 1.05 of ? = 144.72
A. 3.245
B. 2.453
C. 2.354
D. 2.654
E. इनमें से कोई नहीं
Q 31 :
8602 को पूर्ण वर्ग बनाने के लिए उसमें कौन-सी सबसे छोटी संख्या जोड़ी जानी चाहिए ?
A. 234
B. 47
C. 128
D. 36
E. इनमें से कोई नहीं
Q 32 :
एक आयत पार्क की लंबाई और चौड़ाई क्रमशः 14 मीटर और 7 मीटर है। अधिकतम त्रिज्या के वृत्त का क्षेत्रफल ज्ञात कीजिए ?
A. 29.62
B. 16.52
C. 38.5
D. 27.85
Q 33 :
फेमिना भारत की प्रसिद्ध पत्रिका है। उस कंपनी में 150 रुपये का लाभ होता है। यदि n / पत्रिका का 2/3 भाग 60% लाभ पर बेचा जाता है, तो 32% लाभ पर 1/4 भाग और 24% लाभ पर शेष भाग और पत्रिका की लागत मूल्य ज्ञात करें ?
A. 100
B. 200
C. 300
D. 400
Q 34 :
इन चार वस्तुओं की सूची में तीन एक समूह के है और एक नहीं है जो भिन्न है ?
A. समुद्र
B. नदी
C. झील
D. बारिश
Q 35 :
एक आदमी एक निश्चित राशि के लिए ढाई साल के लिए 12% की तुलना में साढ़े 6 साल के लिए 10% की दर से साधारण ब्याज पर 70 रुपये अधिक कमाता है । यह कितने का है ?
A. 120 रुपये
B. 200 रुपये
C. 3500 रुपये
D. 50 रुपये
E. रुपये 7
Electrical
Q 36 :
Assuming both the voltage sources are in phase, the value of R for which maximum power is transferred from circuit A to circuit B is
A.0.8 Ω
B.1.4 Ω
C.2 Ω
D.2.8 Ω
Q 37 :
For the intrinsic gallium-arsenide, the conductivity at room temperature 25°C is 10-6 (ohm-m)-1, the electron and hole nobilities are 0.85 m2/V-s and 0.04 m2/V-s respectively. What is the intrinsic carrier concentration at the room temperature?
A.7.0 × 1012 m-3
B.7.0 × 10-12 m-3
C.7.0 × 10-12 m3
D.7.0 × 1012 m3
Q 38 :
The resistivity of intrinsic germanium at 30°C is 0.46 –m. What is the intrinsic carrier density at 30°C if the electron mobility is 0.38 m2/V-s and the hole mobility is 0.18 m2/V-s?
A.9.2 × 105/m3
B.2.77 × 103/m3
C.2.43 × 1019/m3
D.8.9 × 1012/m3
Q 39 :
Heat conduction in a semiconductor takes place
A.By the mobility of the carriers
B.Due to energy gap between conduction band and valency band
C.By the holes and thermal vibrations of atoms
D.By the electrons and thermal vibrations of atoms
Q 40 :
Brewster angle is the angle when a wave is incident on the surface of a perfect dielectric at which there is no reflected wave and the incident wave is
A.Parallel polarized
B.Perpendicularly polarized
C.Normally polarized
D.None of the above
Q 41 :
An electrical breakdown of a p-n junction occurs if
A.Forward voltage increases up to the rating
B.Reverse voltage increases beyond the rating
C.Forward voltage decreases below the rating
D.Reverse voltage decreases below the rating
Q 42 :
The chief deterrent to the widespread application of superconducting materials is
A.Very difficult to form, machine or case
B.The difficult in attaining and maintaining extremely low temperature
C.The poor strength-to-weight ratio
D.The lower oxidation rate at elevated temperatures
Q 43 :
Which one of the following properties is not observed in the carbon nanotubes ?
A.High stiffness and strengths
B.Low densities
C.Unusual electrical property
D.Non-ductile
Q 44 :
The evidence for the importance of electron-phonon interaction in super-conductors comes from
A.Meissner effect
B.Josephson effect
C.Isotope effect
D.x quantization experiments
Q 45 :
Which one of the following materials is used for cable insulation ?
A.Phenol formaldehyde
B.Polytetrafluoroethylene
C.Polyvinyl chloride
D.Acrylonitrile butadiene styrene
Q 46 :
For high speed reading and storing of information in a computer, the material used is
A.Ferrite
B.Piezoelectric
C.Pyroelectric
D.Ferromagnetic above 768°C
Q 47 :
The temperature above which an anti-ferromagnetic material becomes paramagnetic is called
A.Peak temperature
B.Neel temperatur
C.Critical temperature
D.Weiss temperature
Q 48 :
Which effect is the converse of Peltier effect ?
A.Seeback effect
B.Thomson effect
C.Hall effect
D.Joule effect
Q 49 :
Magnetic materials which may be readily magnetized in either direction are
A.Soft magnetic materials
B.Hard magnetic materials
C.High eddy current loss materials
D.High hysteresis loss materials
Q 50 :
Consider the following statements regarding a ferromagnetic material:
1.Below the ferromagnetic Curie temperature, the ferromagnetic materials exhibit hysteresis effect.
2.The coercive force is the filed required to reduce the flux density to zero.
Which of the above statements is/are correct?
A.Both 1 and 2
B.Neither 1 nor 2
C.1 only
D.2 only
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Maha Metro Technician Exam (Electrical) Question Bank Book - English
The impact ionization phenomenon in semiconductor may be viewed as the reverse process of
A.Radiative recombination
B.Auger recombination
C.Surface recombination
D.Shockley-Read-Hall recombination
Q 52 :
Refractive index of a slice glass can be reduced by doping it with tiny amount of
A.GeO2
B.B2O3
C.P2O5x
D.Al2O3
Q 53 :
If a diameter of a copper wire is increased by two times keeping its terminal voltage same, then the drift velocity will
A.Become twice
B.Become half
C.ecome four times
D.Remain unchanged
Q 54 :
In an induction type energy meter, the steady speed attained by the rotating disc is
1.Proportional to the deflecting torque.
2.Proportional to the resistance of the path of eddy currents.
3.Inversely proportional to the effective readings of disc from its axis.
4.Inversely proportional to the square of brake magnetic flux.
Which of the above are correct?
A.1, 2 and 3 only
B.1, 2 and 4 only
C.2, 3 and 4 only
D.1, 2, 3 and 4
Q 55 :
If ‘KCLFTSB’ stands for ‘best of luck’ and ‘SHSWDG’ stands for ‘good wishes’, which of the following indicates ‘ace the exam’?
A.MCHTX
B.MXHTC
C.XMHCT
D.XMHTC
Q 56 :
Consider the following statements associated with the basic electrostatic properties of ideal conductors:
1.The resultant field inside is zero.
2.The net charge density in the interior is zero.
3.Any net charges reside on the surface.
4.The surface is always equipotential.
5.The field just outside is zero.
Which of the above statements are correct?
A.1, 2, 3 and 4
B.3, 4 and 5 only
C.1, 2 and 3 only
D.2 and 3 only
Q 57 :
A semiconductor device made out of a material having very high temperature coefficient of resistance is
A.Transistor
B.Varistor
C.Thyristor
D.Thermistor
Q 58 :
The electrical conductivity of a semiconductor increases with increase in temperature because
A.The carrier concentration increases
B.The mobility of carrier increases
C.Both carrier concentration and mobility increases
D.The band gap decreases
Q 59 :
Which of the following are associated with soft superconductors?
1.Silsbee’s rule
2.Meissner effect
3.Faraday rotation
4.Curie-Weiss law
A.2, 3 and 4
B.1 and 3 only
C.1 and 2 only
D.2 and 3 only
Q 60 :
In a two-channel oscilloscope operating in x-y mode, two in-phase 50 Hz sinusoidal waveforms of equal amplitude are fed to the two channels. What will be the resultant pattern on the screen?
A.An ellipse
B.A parabola
C.Straight line inclined at 45 with respect to x-axis
D.A circle
Q 61 :
Materials, whose resistivity at very low temperature plunges from a finite value to zero and remains there upon further cooling, are known as
A.
Ferromagnetic materials
B.
High-energy hard magnetic materials
C.
Superconductors
D.
Ferromagnetic materials
Q 62 :
In a superconductor, is the temperature is decreased below its critical temperature, the value of critical magnetic field will
A.
Increase
B.
Decrease
C.
Not change
D.
Increase or decrease depending on the superconductor material
Q 63 :
The imaginary part of dielectric constant determines
A.
Component of current which is in phase with the applied field
B.
Component of energy absorbed per m3
C.
Amount of applied field
D.
Component of voltage which is in phase with the applied field
Q 64 :
Direction:Each of the items consists of two statements, one labeled as the ‘Statement (I)’ and the other as ‘Statement (II)’. Examine these two statements carefully and select the answers to these items using the codes given below
A.Statement (I):Hard magnetic materials are used for making permanent magnets. Statement (II):
Hard magnetic materials have relatively small and narrow hysteresis loop.
B.Both Statement (I) and Statement (II) are individually true and Statement (II) is the correct explanation of Statement (I)
C.
Both Statement (I) and Statement (II) are individually true and Statement (II) is NOT the correct explanation of Statement (I)
D.
Statement (I) is true but Statement (II) is false
E.
Statement (I) is false but Statement (II) is true
Q 65 :
In 8085A microprocessor, the operation performed by the instruction LHLD 2100 H is
A.(H) ← 21 H, (L) ←00
B.(H) ← M (2100 H), (L) ←M(2101H)
C.(H) ← M (2100 H), (L) ←M(2100H)
D.(H) ← 00H, (L) ←21H
Q 66 :
If the magnetic susceptibility of a specimen is small and positive, the specimen is
A.
Diamagnetic
B.
Paramagnetic
C.
Ferromagnetic
D.
Non-magnetic
Q 67 :
Manganese ferrite is a 1 : 1 mixture of
A.
Manganese nitride and iron oxide
B.
Manganese oxide and iron nitride
C.
Manganese nitride and iron sulphide
D.
Manganese oxide and iron sulphide
Q 68 :
When a ferromagnetic substance is magnetized, small changes in dimensions occur. Such a phenomenon is known as
A.
Magnetic hysteresis
B.
Magnetic expansion
C.
Magnetostriction
D.
Magneto-calorisation
Q 69 :
In ferromagnetic , anti-ferromagnetic and ferromagnetic materials, the atomic thermal motions counteract the coupling forces between the adjacent atomic dipole moments, thereby causing
A.
Some dipole misalignment regardless of whether an external field is present
B.
Increase in dipole alignment regardless of whether an external field is present
C.
No effect on dipole alignment
D.
Atoms tend to de-randomize the direction of moments
Q 70 :
The Hall effect voltage in intrinsic silicon
A.
Is positive
B.
Is zero
C.
Is negative
D.
Changes its sign based on application of magnetic field
Q 71 :
Most outstanding property of indium antimonide is
A.A very wide range gap
B.
High resistivity at room temperature
C.
High carrier mobility
D.
Very low conductivity at room temperature
Q 72 :
Which of the following semiconducting compounds is used in photoconductive devices?
A.
Caesium antimonide
B.
Barium oxide
C.
Lead sulphide
D.
Zinc oxide
Q 73 :
Consider the following transducers:
1.LVDT
2.Piezoelectric
3.Thermocouple
4.Photovoltaic cell
Which of the above are active transducers?
A.1, 2 and 3
B.
1, 2 and 4
C.
2 and 3 only
D.
2, 3 and 4
Q 74 :
Consider the following statements regarding magnetic materials:
1.A diamagnetic material has no permanent dipole
2.Paramagnetic material has anti-parallel orientation of equal moments with neighboring dipoles
3.Ferrimagnetic material has anti parallel orientation of unequal moments between neighboring dipoles
4.Anti-ferromagnetic material has negligible interaction between neighboring dipoles
Which of these statements are correct?
A.1 and 2
B.
3 and 4
C.
2 and 4
D.
1 and 3
Q 75 :
Consider the following statements regarding hysteresis loops of hard and soft magnetic materials:
1.Hysteresis loss of hard magnetic material will be less than that of soft material
2.Coercivity of hard materials will be greater than that of soft material
3.Retentivity of the two materials will always be equal
Which of these statements are correct?
A.1, 2 and 3
B.
2 only
C.
3 only
D.
1 and 3 only
Q 76 :
Loss-tangent in plane waves in lossy dielectrics will be
A.
Proportional to the Y component of the magnetic field intensity (HY)
B.Inversely proportional to the Y component of the magnetic field intensity (HY)
C.
Inversely proportional to the X component of the magnetic field intensity (HX)
D.
proportional to the X component of the magnetic field intensity (HX)
Q 77 :
Orientational polarization is
A.
Inversely proportional to temperature and proportional to the square of the permanent dipole moment
B.
proportional to temperature as well as to the square of the permanent dipole moment
C.
proportional to temperature and inversely proportional to the square of the permanent dipole moment
D.
Inversely proportional to temperature as well as to the square of the permanent dipole moment
Q 78 :
Behavior of conductors, semiconductors and insulators is explained on the basis of
A.
Atomic nature
B.
Molecular structure
C.
Energy band structure
D.
All of the above
Q 79 :
In general, for a superconductor, which of the following statements is true?
A.
A superconductor is a perfect paramagnetic material with the magnetic susceptibility equals to positive unity
B.
A superconductor is a perfect diamagnetic material with the magnetic susceptibility equals to negative one
C.
A superconductor is a perfect ferromagnetic material with the magnetic susceptibility equals to positive one
D.
A superconductor is a perfect piezoelectric material with the magnetic susceptibility equals to negative one
Q 80 :
Ferro-electric materials have a
A.
High dielectric constant which varies non linearly
B.
Low dielectric constant and is non-linear
C.
High dielectric constant which varies linearly
D.
Low dielectric constant but linear
Q 81 :
In the magnetic core the electromotive forces (emf) induced in accordance with Faraday’s law of electromagnetic induction give rise to
A.
Eddy current
B.
Excitation current
C.
Armature current
D.
Field current
Q 82 :
Consider the following characterizing parameters of a material:
1.Magnetic permeability
2.Electron relaxation time 3.Electron effective mass
4.Energy band gap
In case of metals, increase in one of the above parameter decreases its conductivity, while increase in another increases the conductivity. There are respectively
A.1 and 3
B.
3 and 2
C.
4 and 3
D.
1 and 2
Q 83 :
Some magnetic materials may be classified on the basis of
1.Susceptibility
2.Saturation
3.Spin arrangement
4.Nature of hysteresis loop
5.Domain structure
6.Critical temperature above which it behaves as a paramagnetic material
Which of these can be used to distinguish between ferri and ferromagnetic materials?
A.1, 3 and 4 only
B.
2, 3 and 6 only
C.
3, 4 and 5 only
D.
1, 2, 3, 4, 5 and 6
Q 84 :
Magnetism is mainly due to only electron spin around their axis in case of
A.
Diamagnetic materials
B.
Paramagnetic materials
C.
Ferromagnetic materials
D.
Paramagnetic and Diamagnetic materials
Q 85 :
For Paramagnetic materials, the relative permeability is
A.
Less than unity but magnetic susceptibility is relatively small and positive
B.
greater than unity and magnetic susceptibility is relatively small but positive
C.
equal to unity and magnetic susceptibility is relatively large but positive
D.
Less than unity but magnetic susceptibility is relatively large and positive
Q 86 :
Permalloy and Mumetal are examples of
A.
Silicon and iron alloys
B.
Nickel and iron alloys
C.
Cobalt and iron alloys
D.
Permanent magnetic materials
Q 87 :
When a ferromagnetic substance is magnetized, the phenomenon of ‘magnetostriction’ causes
A.
Increase in the body temperature
B.
Change in the permeability of the substance
C.
Small change in its dimensions
D.
Decrease in the saturation flux-density
Q 88 :
The resistivity of ‘Ferrites’ is very much higher than that of ferromagnetic metals, because
A.
Ferrites are chemical compounds and the electrons in them are subject to restraint of valence forces
B.
Ferrites have a low eddy current loss
C.
Ferrites have a non-homogeneous molecular structure
D.
Ferrites have varying flux-density inside the core
Q 89 :
When the temperature exceeds the transition temperature, a ferromagnetic material becomes similar to
A.
Anti- ferromagnetic material
B.
Diamagnetic material
C.
ferrimagnetic material
D.
paramagnetic material
Q 90 :
Einstein relation is referred between
A.
The diffusion constant and the mobility
B.
The conduction and diffusion currents
C.
The conduction and diffusion voltages
D.
None of the above
Q 91 :
In a piezoelectric crystal oscillator, the oscillation or tuning frequency is linearly proportional to the
A.
Mass of the crystal
B.
Square root of the Mass of the crystal
C.
Square of the Mass of the crystal
D.
Inverse of the Square root of the Mass of the crystal
Q 92 :
Which of the following are piezoelectric substances?
1.Barium Titanate
2.Lead Titanate
3.Lead Zirconate
4.Cadmium Suplhate
A.1, 2 and 4
B.
1, 3 and 4
C.
1, 2 and 3
D.
2, 3 and 4
Q 93 :
Consider the following statements:
1.Fermi level in a p-type semiconductor lies close to the top of the valence bond.
2.The forbidden energy in Germanium at 0°K is exactly 0.75 eV.
3.When a p-n junction is reverse biased, then electrons and holes move away from the junction.
Which of these statements are correct?
A.1, 2 and 3
B.
1 and 2 only
C.
2 and 3 only
D.
1 and 3 only
Q 94 :
For a fully transposed transmission line
A.positive negative and zero sequence impedances are equal
B.positive and negative sequence impedances are equal
C.zero and positive sequence impedances are equal
D.negative and zero sequence impedances are equal
Q 95 :
The unit of magnetic flux density is
A.
Gauss
B.
Tesla
C.
Bohr
D.
Wber/sec
Q 96 :
Skin depth is the distance from the conductor surface where the field strength has fallen to
A.
of its strength at the surface
B.
of its strength at the surface
C.
(1/ ) of its strength at the surface
D.
(1/ ) of its strength at the surface
Q 97 :
The electric field in the vicinity of two oppositely charged parallel conductors is
A.
Radial uniformly
B.
In parallel lines between the two imaginary parallel planes passing through the centers of the two conductors
C.
Non uniform and its direction changes from point to point
D.
In parallel circular paths between the two conductors, with the center of the circles located at the mid-point of a line joining the two centers of the two conductors
Q 98 :
Two charges are placed at a distance apart. Now, if a glass slab is inserted between them, then the force between the charges will
A.
Reduce to zero
B.
Increase
C.
Decrease
D.
Not change
Q 99 :
The transfer function of a second order real system with a perfectly flat magnitude response of unity has a pole at (2 – j3). List all the poles and zeros.
A.Poles at (2 ± j3), no zeroes.
B.Poles at (±2 - j3), no zeroes.
C.Poles at (2 - j3),(-2 + j3) zeroes at (-2 – j3), (2 + j3).
D.Poles at (2 ± j3), zeroes at (-2 ± j3).
Q 100 :
The presence of one of the following materials, in iron or steel for use as a magnetic material, tends to reduce the hysteresis loss
A.
Carbon
B.
Sulphur
C.
Phosphorous
D.
Silicon
Q 101 :
The depth of penetration of a wave in a lossy dielectric increases with increasing
A.
Conductivity
B.
Permeability
C.
Wavelength
D.
Permittivity
Q 102 :
Match List-I and List-II and select the correct answer using the code given below the lists: List-I List-II
A.Carbon (Diamond) 1. Conducting
B.Silicon 2. Semiconducting
C.Tin (Grey) 3. Insulating
D.Lead
A.
A B C D
3 2 1 1
B.1 2 1 3
C.
3 1 2 1
D.
1 1 2 3
Q 103 :
It is possible to destroy the superconductivity of a material by applying
A.
A strong magnetic field
B.
A temperature much below the transition temperature
C.
A strong electric field
D.
A pressure below that of the atmosphere
Q 104 :
Consider the following properties regarding insulation for cables:
1. A low specific resistance
2. High temperature withstand
3. High dielectric strength
Which of the above properties of insulation are correct while using cables?
A. 1 and 2 only
B.1 and 3 only
C.
2 and 3 only
D.
1,2 and 3
Q 105 :
The open loop poles of a third order unity feedback system are at 0, -1, -2, let the frequency corresponding to the point, where the root locus of the system transits to unstable region be K. now suppose we introduce a zero in the open loop transfer function at -3, while keeping all the earlier open loop poles intact. Which one of the following is correct about the point, where the root locus of the modified system transits to unstable region?
A.it corresponds to a frequency greater than K
B.it corresponds to a frequency less that K
C.it corresponds to a frequency K
D.Root locus of modified system never transits to unstable region
Q 106 :
Which of the following moving particles cannot be deflected by magnetic fields?
A.
α - Particles
B.
Neutrons
C.
Protons
D.
Electrons
Q 107 :
The Fermi level in an n-type semiconductor at zero degree kelvin lies
A.
Below the donor level
B.
Half-way between the conduction band and the donor level
C.
Half-way between the conduction band and the valence level
D.
Close to the valence band
Q 108 :
According to free electron theory, electrons in a metal are subjected to
A.Constant potential
B.
Sinusoidal potential
C.
Square wave potential
D.
Non-periodic potential
Q 109 :
Controlled addition of group III element to an elemental semiconductor results in the formation of
A.
Intrinsic semiconductor
B.
n-type semiconductor
C.
p-type semiconductor
D.
Degenerate semiconductor
Q 110 :
Phonons (Quanta of lattice vibration) obey
A.
Maxwell distribution
B.
Maxwell-Boltzmann distribution
C.
Fermi-Dirac distribution
D.
Bose-Einstein distribution
Q 111 :
Did not you buy…………..when you went shopping?
A.any paper
B.much paper
C.no paper
D.a few paper
Q 112 :
Consider the following standard symbols for two-port parameters :
1.h12 and h21 are dimensionless. 2.h11 ohms and B have dimensions of ohms.
3.BC is dimensionless.
4.C is dimensionless.
Which of the above are correct ?
A.1, 2 and 3 only
B.
1, 2 and 4 only
C.
3 and 4 only
D.
1, 2, 3 and 4
Q 113 :
An iron-cored choke coil has an equivalent resistance of 5Ω. It draws 10 A when the applied voltage is 240V, 50Hz. Its inductance and power factor respectively are
A.
7.5 mH and 0.1 (lag)
B.
74.7 mH and 0.1 (lag)
C.
74.7 mH and 0.208 (lag)
D.
7.5 mH and 0.208 (lag)
Q 114 :
A voltage of 100 V is applied to an impedance of Z = (3 + j4) Ω. What are the values of active power, reactive power and volt-amperes respectively ?
A.
1200 W, 1220 VAR and 2000 VA
B.
1600 W, 1600 VAR and 2200 VA
C.
1200 W, 1600 VAR and 2000 VA
D.
1600 W, 1200 VAR and 2200 VA
Q 115 :
The voltage across an impedance Z is 100∠15° V and the current through Z is 20∠-45° A. The active and the reactive powers in Z respectively are
A.
1000 W and 1732 VAR
B.
500 W and 1732 VAR
C.
1000 W and 6000 VAR
D.
500 W and 6000 VAR
Q 116 :
An a.c. source of 200 V r.m.s. supplies an active power of 1200 W and a reactive power of 1600 VAR to a load. The r.m.s. current and the power factor of the load respectively are
A.
10 A and 0.6
B.
8 A and 0.8
C.
10 A and 0.8
D.
8 A and 0.6
Q 117 :
A shunt capacitor used for reactive power compensation is operated at 98% of its rated frequency and 95% of its rated voltage. The reactive power supplied by this capacitor (as compared to its rated capacity) is
A.
7.9% lower
B.
11.5% lower
C.
11.5% higher
D.
7.9% higher
Q 118 :
Consider two nodes A and B connected by an impedance of j5 W. If the voltages at nodes A and B are 100∠30° V and 100∠0° V respectively, the real power that can be transferred from node A to B is
A.
2000 W
B.
1000 W
C.
2769 W
D.
276.9 W
Q 119 :
The Thevenin equivalent voltage and resistance across AB shown in the figure respectively are
A.5 V and 5 Ω
B.
25 V and 3 Ω
C.
35 V and 2 Ω
D.
25 V and 5 Ω
Q 120 :
The theorem which states that in any linear, non-linear, passive, active, time-variant, time-invariant network, summation of instantaneous power is zero will be called as
A.
Tellegen’s theorem
B.
Compensation theorem
C.
Reciprocity theorem
D.
Superposition theorem
Q 121 :
Transients are cause because
1.The load is suddenly connected to or disconnected from the supply
2.Of the sudden change in applied voltage form one finite value to the other
3.Of the change in stored energy in inductors and capacitors
Which of the above statements are correct?
A.1 and 2 only
B.
1 and 3 only
C.
2 and 3 only
D.
1, 2 and 3
Q 122 :
Which of the following can produce maximum induced voltage?
A.
1 A d.c. current
B.
50 A d.c. current
C.
1 A, 60 Hz a.c. current
D.
1 A, 490 Hz a.c. current
Q 123 :
For cleat wiring and 250 volts supply, the cables will be placed _____ a part centre to centre for single corw cables.
A.4.5 cm
B.2.5 cm
C.3 cm
D.4 cm
Q 124 :
Which insulation is most widely used for covering wires/cables used in internal wiring ?
A.Paper
B.Wood
C.
Glass
D.PVC
Q 125 :
If the Q-factor of a coil at resonant frequency of 1.5 MHz is 150 for a series resonant circuit, then the corresponding bandwidth is
A.
225 MHz
B.
106 MHz
C.
50 kHz
D.
10 kHz
Q 126 :
The number of p-n junctions in a thyristor (SCR) is/are:
A.1
B.2
C.3
D.4
Q 127 :
In a two-wattmeter method of measuring power in a balanced 3-phase circuit, the ratio of the two wattmeter readings is 1 : 2. The circuit power
A.
0.707
B.
0.5
C.
0.866
D.
Indeterminate
Q 128 :
A balanced delta-connected load (16 + j12)Ω/phase is connected to a 3-phase 230 V balanced supply. The line current and the real power drawn respectively are
A.
19.9 A and 3.17 W
B.
11.5 A and 6.34 W
C.
19.9 A and 6.34 W
D.
11.5 A and 3.17 W
Q 129 :
A balanced load of 5 + j4 is connected in delta. What is the impedance per phase of the equivalent star connection?
A.
5 + j4
B.
1.66 + j1.33
C.
15 + j12
D.
2.5 + j2
Q 130 :
In an electric circuit, the number of independent meshes M is
A.
2B – N + 1
B.
B – N + 1
C.
2B – N – 1
D.
B – N – 1
Q 131 :
A.d.c. voltage of 12 volts applied across an inductance in series with a switch
A.Can produce the induced voltage as the current decreases when the switch is opened
B.Cannot produce the induced voltage as the voltage applied has the one polarity
C.Produces more induced voltage when the switch is closed than the switch is opened
D.None of the above
Q 132 :
The power factor of a circuit in which voltage and current waves are non-sinusoidal is defined as
A.
It is the cosine of the angle of phase difference between the voltage and current waves
B.
It is the cosine of the angle of phase difference between the two complex waves
C.
It is the cosine of the angle of phase difference between two equivalent sine waves having respectively r.m.s. values equal to those of the voltage and current in the circuit
D.
It is the sine of the angle of phase difference between the two complex waves
Q 133 :
The low-frequency circuit impedance and the high-frequency circuit impedance for a series resonant circuit respectively are
A.
Capacitive and inductive
B.
Inductive and capacitive
C.
Resistive and inductive
D.
Capacitive and resistive
Q 134 :
Which of the following is an invalid state in an 8-4-2-1 binary codede decimal counter
A.1000
B.
1001
C.0011
D.1100
Q 135 :
The maximum space rate of change of the function which is in increasing direction of the function is known as
