Railway-RRB Technician 2018 CBT 2 Electronics Mechanic Previous Year Question Paper and Answer Key Free PDF Download English (Jan 21, 2019)
RRB Technician 2018 CBT 2 Electronics Mechanic Question Paper and Answer Key PDF English (Jan 21, 2019)
1) A total of 150 minutes is allotted for the examination.
2) The server will set your clock for you. In the top right corner of your screen,
a countdown timer will display the remaining time for you to complete the exam.
Once the timer reaches zero, the examination will end automatically.
The paper need not be submitted when your timer reaches zero.
3) There will, however, be sectional timing for this exam.
You will have to complete each section within the specified time limit.
Before moving on to the next section, you must complete the current one within the time limits.
Q.1 The least number consisting of five digits and that is divisible by 97 is x. What is the sum of digits of x?
Ans
a. 15
b. 13
c. 16
d. 17
Q.2 Laho dance belongs to the state of in India.
Ans
a. Meghalaya
b. Rajasthan
c. Orissa
d. Andhra Pradesh
Q.3 Which of the following Venn diagrams best represents the relationship between women, mother, and doctor?
Ans
a. [Image]
b. [Image]
c. [Image]
d. [Image]
Q.4 A block of wood floats in water with 30% of its volume above water (density 10³kg/m³). The density of wood (in kg/m³) is:
Ans
a. 6×10³
b. 5×10²
c. 7×10²
d. 3×10²
Q.5 Select the number that is related to the third number in the same way as the second number is related to the first number
2/5 : 0.4 :: 1/200 : ?
Ans
a. 0.005
b. 0.05
c. 0.2
d. 0.002
Q.6 What is the distance between the points (-2,4) and (4,4)?
Ans
a. 8 units
b. 4 units
c. 2 units
d. 6 units
Q.7 A/An is the software that manages all of a computer's processes and allows programs and applications to run.
Ans
a. spam
b. malware
c. modem
d. operating system
Q.8 A statement/group of statements is given followed by some conclusion. Choose the conclusion that logically follows from the given statements.
Statement: All hardworking worker in the factory have been promoted in the last five year:
Ans
a. Some worker who were promoted in the last five year are hardworking
b. There are no worker in the factory who are not hardworking
c. Hardworking is the only criteria for promotion
d. After promotion, some worker stopped working hard
Q.9 A sum of money invested at a compound interest amounts to 800 in 2 year and 840 in 3 year. The rate of interest is:
Ans
a. 5%
b. 7%
c. 6%
d. 4%
Q.10 Choose the figure that is different from the rest.
Ans
a. [Image]
b. [Image]
c. [Image]
d. [Image]
Q.11 The resulting value of 0.5 ÷ 12.5 + 0.25 × 0.05 - 0.0125 is:
Ans
a. 0.04
b. 0.5
c. 0.4
d. 0.05
Q.12 Bio-gas is an excellent fuel as it contains up to ______% methane.
Ans
a. 85
b. 70
c. 50
d. 80
Q.13 Identify the material having the lowest coefficient of linear expansion.
Ans
a. Brass
b. Iron
c. Copper
d. Lead
Q.14 In a certain code language, '+' represents 'x', '-' represents '+', 'x' represents '÷' and '÷' represents '-', calculate the answer of the following equation.
8 + 3 x 4 - 2 = ?
Ans
a. 12
b. 6
c. 10
d. 8
Q.15 Who invented the World Wide Web?
Ans
a. Tim Berner-Lee
b. Robert E. Kahn
c. Vint Cerf
d. Antonio Meucci
Q.16 Which of the following organisations prepares a Red List of Threatened Species?
Ans
a. RPPO
b. OIE
c. WWF
d. IUCN
Q.17 Select the word that is related to the third word in the same way as the second word is related to the first word.
Walnut : shell :: Banana : ?
Ans
a. Peel
b. Green
c. Fruit
d. Ripe
Q.18 The work to be done to increase the speed of a 0.5 kg ball from 4 m/s to 8 m/s is:
Ans
a. 8 J
b. 12 J
c. 16 J
d. 4 J
Q.19 Where is the "title block" usually made?
Ans
a. on the upper right hand corner of the drawing sheet
b. lower right corner of the drawing sheet
c. on the upper left corner of the drawing sheet
d. lower left corner of the drawing sheet
Q.20 The construction of the "Sanchi Stupa" was commissioned by which Mauryan Emperor?
Ans
a. Chandragupta Maurya
b. Bindusara
c. Ashoka
d. Kautilya
Q.21 A cylindrical wire of length L and radius r has a resistance R. The resistance of another wire of the same material but of half its length and twice its radius is given by:
Ans
a. R
b. R/2
c. R/4
d. R/8
Q.22 The weight of an object on the Earth is 150 N. Its weight on moon will be:
Ans
a. 75 N
b. 50 N
c. 150 N
d. 25 N
Q.23 An object starts from rest at x = 0 m and t = 0 s. It moves with a constant acceleration of 3 m/s² along x axis. What is its average velocity between time duration of 2 s and 4 s?
Ans
a. 3 m/s
b. 6 m/s
c. 9 m/s
d. 12 m/s
Q.24 The sum of a number and 16 times its reciprocal is 10. The number is:
Ans
a. 5
b. 6
c. 8
d. 7
Q.25 A boy weighing 50 kg runs up a staircase of 40 steps, each of 16 cm height, in 10 s. Calculate his power. (Take g = 10 m/s²)
Ans
a. 480 W
b. 320 W
c. 120 W
d. 80 W
Q.26 Pipes P and Q fill a cistern in 12 minutes when operated together, Q and R fill it in 20 minutes when operated together and P and R fill it in 15 minutes when operated together. In how many minutes can all 3 pipes fill the cistern if operated together?
Ans
a. 10 minutes
b. 2 minutes
c. 4 minutes
d. 3 minutes
Q.27 Two resistors, each of 20 ohms, are connected in parallel and this combination is connected across a 40 V supply voltage. Find the resistance in the circuit.
Ans
a. 40 ohm
b. 10 ohm
c. 25 ohm
d. 20 ohm
Q.28 If a person goes from his house to office walking at 80% of his usual speed, then he is late by 18 minutes to reach the office. What is the usual time taken by him to cover that same distance with his usual speed?
Ans
a. 78 minutes
b. 72 minutes
c. 75 minutes
d. 70 minutes
Q.29 What is the minimum number of lines required to make the given image?
Ans
a. 11
b. 10
c. 9
d. 12
Q.30 In the first angle projection:
Ans
a. Object lies between observer and plane of projection
b. Object lies in the third quadrant
c. The plane of the projection lies between the object and the observer
d. Object lies in the fourth quadrant
Q.31 At what price should a computer be sold so as to get a profit of 25% when its cost price is Rs. 18000?
Ans
a. Rs. 20500
b. Rs. 21000
c. Rs. 22000
d. Rs. 22500
Q.32 A series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series.
TTTTTO, TTTTOT, TTTOTT, TTOTTT, ?
Ans
a. TTTOTT
b. TTTOTTO
c. TTOTT
d. TTOTTTT
Q.33 What is the power dissipated in a 5-ohm resistor carrying 2 A current?
Ans
a. 10 W
b. 0.6 W
c. 2.5 W
d. 20 W
Q.34 M, N, O and P are sitting around a round table? M does not want to sit next to P. N is to the right of P. Which statement of the below is false?
Ans
a. O is to the right of P
b. M is facing P
c. M is to the right of N
d. O is facing N
Q.35 A black surface absorbs as compared to a white surface, under identical conditions.
Ans
a. same heat
b. negligible heat
c. more heat
d. lesser heat
Q.36 The thanksgiving festival of Pongal is primarily celebrated in which state of India?
Ans
a. Tamilnadu
b. Rajasthan
c. Maharashtra
d. Uttar Pradesh
Q.37 The number 800 is divided in 2 parts such that one part is 9/7 times the other. The larger part is:
Ans
a. 480
b. 500
c. 450
d. 550
Q.38 The idea of a Constituent Assembly was given by:
Ans
a. Dr. Rajendra Prasad
b. Maulana Abul Kalam Azad
c. M.N Roy
d. B.R. Ambedkar
Q.39 A jogger jogs 1 km East, then turn North and jogs 4 km, then turns West and jogs 6 km, then turns to his left and jogs 4 km. Where is he now with reference to his starting position?
Ans
a. 5 km West
b. 7 km West
c. 7 km East
d. 5 km East
Q.40 What is the HCF of 275 and 308?
Ans
a. 17
b. 19
c. 15
d. 11
Q.41 What will be the distance covered by a bus moving with a speed of 72 km/h in 5 seconds?
Ans
a. 50 m
b. 200 m
c. 100 m
d. 400 m
Q.42 Two resistors, one of 10Ω and the other of 15Ω, are connected in parallel. This combination is connected in series with a 24Ω resistor and a 12V battery. The current in the 15Ω resistor is:
Ans
a. 0.40 A
b. 0.24 A
c. 0.12 A
d. 0.16 A
Q.43 Which of the following quantities does not have dimensions?
Ans
a. Frequency
b. Volume
c. Relative permeability
d. Force
Q.44 In the question, two statements are given, followed by two conclusions, I and II. You have to consider the statements to be true even if they seem to be at variance with commonly known facts. You have to decide which of the given conclusions, if any, follow(s) from the given statements.
Statement I: All stones are cyclones
Statement 2: All cyclones are tornadoes
Conclusion I: Some tornadoes are stones
Conclusion II: Some cyclones are stones
Ans
a. Only conclusion II follows
b. Only conclusion I follows
c. Neither I nor II follows
d. Both I and II follow
Q.45 Identify the metal having the lowest thermal conductivity.
Ans
a. Copper
b. Mercury
c. Aluminium
d. Silver
Q.46 Choose the figure that is different from the rest.
Ans
a. [Image]
b. [Image]
c. [Image]
d. [Image]
Q.47 Two cows G and H are grazing in a field. They start from the same point. G moves 1.5 km South, then turns East and moves 2.5 km, then turns to its right and moves 3.5 km. Meanwhile H has moved 2.5 km East. Where is H with respect to G.
Ans
a. H is 2 km South of G
b. H is 5 km North of G
c. H is 5 km South of G
d. H is 2 km North of G
Q.48 Identify the non-metal, having high thermal conductivity.
Ans
a. Wood
b. Water
c. Ice
d. Brick
Q.49 In a certain code language, if STUDIO is coded as QRSBGM, then how will RAW be coded in that language?
Ans
a. PYU
b. WXR
c. UKN
d. TGB
Q.50 X jogs a total of 7.5 km in a day. He jogged 25/6 km in the morning. How much did he jog in the Evening?
Ans
a. 5/3 Km
b. 8/3 Km
c. 11/3 Km
d. 10/3 Km
Q.51 The sum of the present ages of a father and a son is 45 year. 5 year ago, the ratio of their ages was 6 : 1. Find the current age of the father.
Ans
a. 40 year
b. 30 year
c. 45 year
d. 35 year
Q.52 In the following figure, square represents Asians, triangle represents writers, circle represents fathers and rectangle represents actors. Which set of letters represents actors who are writers?
Ans
a. GD
b. GF
c. CEG
d. HGF
Q.53 In the question, two statements are given, followed by three conclusions, I, II and III. You have to consider the statements to be true even if they seem to be at variance from commonly known facts. You have to decide which of the given conclusions, if any, follow(s) from the given statements.
Statement 1: All bamboo are tall.
Statement 2: All tall are grass.
Conclusion 1: Some grass are bamboo.
Conclusion 11: Some tall are bamboo.
Conclusion III: Some grass are tall.
Ans
a. All conclusions I, II and III follow
b. Only conclusion I and II follow
c. Only conclusion II and III follow
d. Only conclusion I and III follow
Q.54 Identify the insulator from the below having high resistivity.
Ans
a. Glass
b. Diamond
c. Hard rubber
d. Dry paper
Q.55 An object is accelerating at 5 m/s² from its rest position. The velocity of this object after 5 s is:
Ans
a. 15 m/s
b. 20 m/s
c. 5 m/s
d. 25 m/s
Q.56 Two trains start moving towards each other when they are 2000 meter apart. First train travels at the speed of 20 m/s and the other one at 30 m/s. After how many seconds do they meet?
Ans
a. 30 seconds
b. 40 seconds
c. 50 seconds
d. 60 seconds
Q.57 An object travels distance of first 30m in 5 s and the next distance of 30 m in 3 s. The average speed of the object is:
Ans
a. 6.5m/s
b. 9.0m/s
c. 4.5m/s
d. 7.5m/s
Q.58 What is the digit that will come at the unit's place in the result of (423)⁴²³ × (1237)²⁸ ?
Ans
a. 9
b. 7
c. 1
d. 3
Q.59 Which type of pencil has the hardest graphite lead?
Ans
a. 3H
b. 2H
c. 9H
d. 4H
Q.60 In a Class 2 lever, effort and load move in the:
Ans
a. same direction
b. the movement depends on the load
c. opposite direction
d. perpendicular direction
Q.61 How much heat should be transferred to the 100 g of an edible oil to raise its temperature by 20°C ? (Specific heat of oil 1965 Jkg⁻¹K⁻¹)
Ans
a. 4.31 kJ
b. 2.70 kJ
c. 1.32 kJ
d. 3.93 kJ
Q.62 In a certain code language, 512 means 'steel makes tower', 175 means 'brick makes tower', and 327 means 'brick and steel'. Find the code for 'and'.
Ans
a. 3
b. 1
c. 2
d. 7
Q.63 Find the odd word from the given alternatives.
Ans
a. Carom board
b. Wheel
c. Coin
d. Hula hoop
Q.64 A 'compass' is used to draw:
Ans
a. Circle
b. Rectangle
c. Triangle
d. Straight line
Q.65 If G + H means G is daughter of H ; G - H means G is father-in-law of H ; and G * H means G is husband of H ; then which of the following shows that O is the sister L ?
Ans
a. O * N - M + L
b. O - N * M + L
c. O + M - N * L
d. O - N + M * L
Q.66 A sum of Rs. 10000 was deposited in a bank that offer 20% annual compound interest. What will the amount be in the bank after 2 year?
Ans
a. Rs. 12000
b. Rs. 8000
c. Rs. 14400
d. Rs. 13600
Q.67 Pipes A and pipe B can fill a tank at rate of 30m³/hr and 40m³/hr respectively. Together they fill the tank in 4 hours. Find the volume of the tank.
Ans
a. 180 m³
b. 280 m³
c. 360 m³
d. 200 m³
Q.68 What is the side of a cube if the total surface area is 96 sq. cm?
Ans
a. 3 cm
b. 5 cm
c. 4 cm
d. 6 cm
Q.69 Read the question below followed by two statements. Study them and decide which statement(s) is/are sufficient to answer the question.
Question: What was the revenue of the zoo on a certain day?
Statements:
i) 120 person visited the zoo on that certain day.
ii) A discount of 25% on ticket price was offered on that certain day.
Ans
a. Neither statement I nor II is sufficient
b. Statement I alone is sufficient while II alone is not sufficient
c. Statement II alone is sufficient while I alone is not sufficient
d. Either statement I or II is sufficient
Q.70 A sheet of styrofoam of thickness 2cm and area 0.1m² has a temperature difference of 30°C between its inner and outer surfaces. Considering thermal conductivity as 0.01 J/s mK, the rate of heat flow through the sheet is:
Ans
a. 3.0 J/s
b. 2.0 J/s
c. 1.0 J/s
d. 1.5 J/s
Q.71 A ball of 200g is thrown vertically upward with a speed of 20m/s. The momentum of the ball at the highest point of its path is (take g = 10m/s²):
Ans
a. 200 kg/s
b. 100 kg/s
c. 40 kg/s
d. 0
Q.72 Given below is a statement followed by two assumptions numbered I and II. You have to decide which of the assumptions is/are implicit in the statement.
Statement: College students should work during summer holidays to improve their chances of getting a job.
Assumption I: Not all college students want a job.
Assumption II: There are enough summer jobs for most college students.
Ans
a. Both I and II are implicit
b. Only assumption I is implicit
c. Neither I nor II is implicit
d. Only assumption II is implicit
Q.73 What will be A's share of profit if the total profit is Rupees 1000 and is to be divided amongst A, B and C in the ratio 3 : 2 : 5?
Ans
a. Rs. 250
b. Rs. 300
c. Rs. 500
d. Rs. 200
Q.74 If we compare the effort arm length with the load arm length in a class 1 lever, ______
Ans
a. effort arm length is always < load arm length
b. effort arm length is always = load arm length
c. effort arm length is always > load arm length
d. effort arm length can be greater than, equal to or less than the length of the load arm
Q.75 Increasing the pressure on an object ______ the volume of the object and therefore ______ its density.
Ans
a. increases, increases
b. increases, decreases
c. decreases, increases
d. decreases, decreases
Q.76 If we compare the effort arm length with the load arm length in a Class 2 lever, ______
Ans
a. effort arm length is always = load arm length
b. effort arm length can be greater than, equal to or less than the length of the load arm
c. effort arm length is always > load arm length
d. effort arm length is always < load arm length
Q.77 A source of voltage V maintains a current I in a circuit. The power (P) input to the circuit by the source is given by:
Ans
a. P = VI
b. P = V / I
c. P = I / V
d. P = I / (VI)
Q.78 If we double the length of a copper wire keeping the cross-sectional area constant, its resistance increases by ------------ times.
Ans
a. Four
b. One
c. Three
d. Two
Q.79 Which of these is NOT a novel written by Premchand?
Ans
a. Godaan
b. Gaban
c. Nirmala
d. Deepshikha
Q.80 The Celsius temperature (tC) and the Fahrenheit temperature (tF) are related as:
Ans
a. tF = (5 / 9) tC + 32
b. tF = (9 / 5) tC
c. tF = (9 / 5) tC + 32
d. tF = (5 / 9) tC
Q.81 What is the square root of 0.000225?
Ans
a. 0.0125
b. 0.0015
c. 0.005
d. 0.015
Q.82 ΔDEF is similar to ΔPQR. If the ratio of semi-perimeter of ΔDEF and ΔPQR is 4 : 5 and if PQ = 15cm, then the length of DE is:
Ans
a. 12 cm
b. 10 cm
c. 20 cm
d. 18 cm
Q.83 Which country did India beat to win the Under19 Cricket Asia Cup 2018?
Ans
a. Sri Lanka
b. Afghanistan
c. Pakistan
d. Bangladesh
Q.84 The view of an object produced on a vertical plane is referred to as:
Ans
a. Right hand side view
b. Top view
c. Front view
d. Left hand side view
Q.85 Who was appointed as the Chief Justice of India on 03.10.2018?
Ans
a. Mr. N.V. Ramana
b. Mr. Ranjan Gogoi
c. Mr. Kurian Joseph
d. Mr. Arjan Kumar Sikri
Q.86 The specific heat capacity of a substance is defined by:
Ans
a. Q = m/ΔT
b. Q = mc
c. Q = mcΔT
d. Q = cΔT/m
Q.87 10% of 1000% of 100 = ?
Ans
a. 110
b. 100
c. 102
d. 105
Q.88 A pair of plier and scissor are together considered as a Class 1 lever.
Ans
a. triple
b. single
c. double
d. simple
Q.89 A component that adds to a software program's functionality is called as
Ans
a. Plug-in
b. Malware
c. Processor
d. Modem
Q.90 If C% D means C is the wife of D; C & D means C is the father of D; and If C $ D means C is the daughter of D, then what would X $ Y % W & Z mean if W has only one daughter?
Ans
a. X is the son of Z
b. Z is the sister of X
c. Z is the sister of the mother of X
d. X is the sister of Z
Q.91 Our electricity bills carry the energy consumption, expressed in units of
Ans
a. KVA
b. kW
c. kWh
d. KJ
Q.92 The length and breadth of a rectangle is 6 cms and 8 cms respectively. Then what will be the area of a square whose side is equal to the length of the diagonal of this rectangle.
Ans
a. 100 cm²
b. 64 cm²
c. 144 cm²
d. 80 cm²
Q.93 A series is given, with one number missing. Choose the correct alternative from the given ones that will complete the series.
7.4, 8.7, 10.0, 11.3, ?, 13.9
Ans
a. 11.9
b. 12.3
c. 11.7
d. 12.6
Q.94 The median of 2, 9, 11, 7, 3, 4, 8, 5, 3, 6 is:
Ans
a. 3.5
b. 5
c. 5.5
d. 4
Q.95 An article was marked for Rs. 1000. Had a discount of 16% was offered, a profit of 5% would have been made. What is the cost price of the article?
Ans
a. Rs. 750
b. Rs. 800
c. Rs. 850
d. Rs. 900
Q.96 Find the odd set of letter from the given alternatives.
Ans
a. JLN
b. MNO
c. RTV
d. CEG
Q.97 Standing up and supporting the lower back with hands, then gently arching back and holding this posture for some time is called as:
Ans
a. Finger fan
b. Back arching
c. Wrist stretch
d. Pectoral stretch
Q.98 Which two signs should be interchanged to correct the given equation?
15 ÷ 3 + 2 × 10 - 6 = 14
Ans
a. ÷ and -
b. ÷ and +
c. + and ×
d. + and -
Q.99 Which of these is NOT a type of string musical instrument?
Ans
a. Bass
b. Violin
c. Tuba
d. Cello
Q.100 What was the day of the week on January 26, 1989?
Ans
a. Tuesday
b. Thursday
c. Sunday
d. Monday
Q.101 In the context of cables, FRC stands for:
Ans
a. Full Rolling Cable
b. Fat Ribbon Cable
c. Fast Reeling Cable
d. Flat Ribbon Cable
Q.102 What is the use of an RTD?
Ans
a. Measuring temperature
b. Measuring pressure
c. Measuring humidity
d. Measuring position
Q.103 Which of the following shows the proper biasing of a PNP transistor?
Ans
a. base and emitter - forward bias; collector and emitter - reverse bias
b. base and emitter - forward bias; collector and emitter - forward bias
c. base and emitter - reverse bias; collector and emitter - forward bias
d. base and emitter - reverse bias; collector and emitter - reverse bias
Q.104 In an op-amp, the input impedance is ______ and the output impedance is ______.
Ans
a. high; high
b. low; low
c. low; high
d. high; low
Q.105 Which of the following devices requires a battery?
Ans
a. Step-up chopper
b. stabilizer
c. Step-down chopper
d. UPS
Q.106 10 cells each with an EMF of 1.5 V and an internal resistance of 0.1 Ω are connected in series. What will be the total EMF and resistance of the circuit?
Ans
a. 3.21 V and 1.5 Ω
b. 1.18 V and 1.5 Ω
c. 4.15 V and 2.0 Ω
d. 15 V and 1.0 Ω
Q.107 In an amplifier with a positive feedback circuit, gain:
Ans
a. Decreases
b. remains constant
c. Increases
d. first increases and then decreases
Q.108 A full-wave bridge rectifier consists of:
Ans
a. one diode
b. two diodes
c. three diodes
d. four diodes
Q.109 A circuit that changes a code into a set of signals is called
Ans
a. Encoder
b. multiplexer
c. Decoder
d. Selector
Q.110 For which of the following gates the output is zero when one or more inputs are zero?
Ans
a. OR
b. NOR
c. XOR
d. AND
Q.111 Fibre cables used for 'Fibre to Home' installations are ________.
Ans
a. multimode graded
b. multimode step
c. multitaxis
d. single mode
Q.112 Which of the following circuit has its output dependent only upon the present input?
Ans
a. Analog Circuits
b. Flip Flops
c. Combinational Circuits
d. Sequential Circuits
Q.113 The output impedance of a MOSFET is:
Ans
a. Medium impedance
b. Low impedance
c. High impedance
d. Very low impedance
Q.114 The waveform in a DSO is stored in ______ form.
Ans
a. Digital
b. Expanded
c. Analog
d. Mixed
Q.115 Which of the following is a function of an inductor?
Ans
a. It opposes the flow of AC
b. It allows the flow of current.
c. It opposes the flow of DC.
d. It opposes the flow of both AC and DC.
Q.116 78xx series ICs are:
Ans
a. zener regulated
b. series regulated
c. shunt regulated
d. series and shunt regulated
Q.117 In MS Excel, we cannot calculate:
Ans
a. division solutions
b. integration solutions
c. arithmetic solutions
d. multiplication solutions
Q.118 Eddy current proximity sensors can detect ______.
Ans
a. cotton
b. metal
c. wood
d. epoxy
Q.119 CRO stands for:
Ans
a. Cathode Relay Oscilloscope
b. Cathode Ray Oscilloscope
c. Cathode Rectifier Oscilloscope
d. Cathode register oscilloscope
Q.120 An IC with four NOR gates is:
Ans
a. 7486
b. 7404
c. 7432
d. 7402
Q.121 Windows 10 is a/an:
Ans
a. booting system
b. operating and booting system
c. operating system
d. counting pulse
Q.122 Impedance can be measured by using which of the following equipment?
Ans
a. CRO
b. LCR meter
c. Function generator
d. DSO
Q.123 In a bipolar transistor, alpha is the ratio of:
Ans
a. collector current to emitter current
b. emitter current to collector current
c. base current to collector current
d. collector current to base current
Q.124 Race Around condition can be avoided in Digital logic circuits using?
Ans
a. Shift Register
b. Master Slave JK Flip Flop
c. Full Adder
d. AND Gate
Q.125 In two-stage RC coupling, the function of a Cc capacitor is:
Ans
a. to allow AC and DC to pass
b. to block AC and DC
c. to block DC voltage
d. to block AC input signal
Q.126 A ______ can be represented as two port linear network.
Ans
a. common base
b. common collector
c. common emitter
d. hybrid parameter
Q.127 A capacitor consists of metal plates separated by an insulator.
Ans
a. Three
b. Two
c. four
d. one
Q.128 What is the frequency band of shortwave radio transmission?
Ans
a. 1.7 to 30 GHz
b. 1.7 to 30 MHz
c. 1.7 to 30 kHz
d. 1.7 to 30 Hz
Q.129 What will be the power required by a bulb load having a resistance of 50 Ω if the voltage applied is 220 V?
Ans
a. 828 W
b. 1068 W
c. 968 W
d. 200 W
Q.130 Which of the following is an application of transformers?
Ans
a. Step up or step down AC voltage
b. Convert AC to DC
c. Convert DC to AC
d. Increase frequency
Q.131 If current = 1.414 A and resistance = 50Ω, then find power.
Ans
a. 400 Watts
b. 100 Watts
c. 300 Watts
d. 200 Watts
Q.132 What is the number of cycles completed by a 50-Hz line in 10 seconds?
Ans
a. 5000
b. 5
c. 500
d. 50
Q.133 Input ripple of SMPS is _______.
Ans
a. high
b. nil
c. low
d. zero
Q.134 UJT is not used for:
Ans
a. timing circuits
b. phase control
c. triggering an SCR/TRIAC
d. amplification
Q.135 The output of Schmitt trigger is:
Ans
a. Sine wave
b. Square wave
c. Random wave
d. Rectangle wave
Q.136 Which component of a digital panel meter converts analogue signals into a digital format?
Ans
a. ADC
b. comparator
c. magnetic field sensor
d. hall sensor
Q.137 Which of the following is a function of a resistor?
Ans
a. It both allows and opposes the flow of current.
b. It opposes the flow of current.
c. It allows the flow of current.
d. It neither allows nor opposes the flow of current.
Q.138 Heat sink of a power transistor can be used for:
Ans
a. additional heat observation
b. additional heat dissipation
c. additional heat dissolution in water
d. increasing the heat
Q.139 Transformer losses are due to:
Ans
a. core and copper losses
b. primary loss
c. only core losses
d. only copper losses
Q.140 Which of the following is used as a receiver for fibre optic communication?
Ans
a. LED
b. Laser Diode
c. Photodiode
d. Phototransistor
Q.141 In 8051 microcontroller the resultant of two numbers added is
Ans
a. Erased
b. not stored anywhere
c. stored in the accumulator
d. stored in the register
Q.142 The following short name is also called as for diode alternating current.
Ans
a. DIAC
b. SCR
c. FET
d. TRIAC
Q.143 The binary representation for the hexadecimal number 4A is:
Ans
a. 101111
b. 01001011
c. 01001011
d. 01001010
Q.144 The motor used in household refrigerators is
Ans
a. single phase induction motor
b. Hysteresis motor
c. dc series motor
d. Reluctance motor
Q.145 A push-pull amplifier is used for:
Ans
a. voltage amplification
b. current amplification
c. RF signal amplification
d. power amplification
Q.146 Which of the following statements is true with respect to a Primary Cell?
Ans
a. It can neither be recharged nor be reused.
b. It cannot be recharged but can be reused.
c. It can be recharged and reused.
d. It can be recharged but cannot be reused.
Q.147 Most widely used solar cell material is
Ans
a. steel
b. silicon
c. mercury
d. Cast iron
Q.148 Burglar alarm circuits consist of
Ans
a. LCDs
b. VCDs
c. LVDS
d. IRLEDs
Q.149 What happens if a capacitor is placed in parallel with a DC source?
Ans
a. It amplifies the voltage.
b. The circuit acts as an open circuit.
c. The circuit acts as a short circuit.
d. It converts DC to AC.
Q.150 If a capacitor is placed in the feedback path of an op-amp circuit, then the circuit can act as
Ans
a. integrator
b. multiplier
c. divider
d. subtractor
Q.151 The device used for converting continuous DC to discontinuous DC is known as a/an
Ans
a. chopper
b. rectifier
c. oscillator
d. amplifier
Q.152 A limiter circuit is also known as a:
Ans
a. clamp circuit
b. chopping circuit
c. clipper circuit
d. chopper circuit
Q.153 Forward biasing of a PN junction diode is indicated by which of the following connections?
Ans
a. -ve to anode and +ve to cathode for full cycle
b. +ve to anode and -ve to cathode for full cycle
c. +ve to cathode and -ve to anode for one half cycle, and +ve to anode and -ve to cathode for the second half cycle.
d. -ve to cathode and -ve to anode for full cycle
Q.154 For pulse generation, the IC used is:
Ans
a. 7402
b. 555
c. 7805
d. 7432
Q.155 What is the material used for the manufacture of fiber optic cables?
Ans
a. Wood
b. Steel
c. Plastic
d. Glass
Q.156 The source of light for optic fibre transmission is
Ans
a. Incandescent lamp
b. Laser and LED
c. Fluorescent lamp
d. Arc lamp
Q.157 BC 194 is the transistor used for:
Ans
a. the amplification of AF and RF signals
b. the rectification of AC
c. the amplification of AF signal
d. the amplification of RF signal
Q.158 How many counter/timer does the 8051 microcontroller have?
Ans
a. 2
b. 8
c. 4
d. 1
Q.159 The frequency of the rotor current in an induction motor is equal to:
Ans
a. slip × input frequency
b. slip × stator current
c. slip × rotor speed
d. slip × stator frequency
Q.160 What is unity gain amplifier also known as?
Ans
a. Voltage follower
b. Comparator
c. Single sided
d. Differential
Q.161 What happens to the resistance of an RTD with an increase in temperature?
Ans
a. It is uncertain.
b. It increases.
c. It remains the same.
d. It decreases.
Q.162 16-bit registers consist of:
Ans
a. 16 flip-flops
b. 20 flip-flops
c. 12 flip-flops
d. 8 flip-flops
Q.163 Cells are connected in series in order to
Ans
a. Decrease the voltage
b. Increase the Voltage
c. Increase the current
d. Increase the cell life
Q.164 The combination of two half adders is a
Ans
a. full adder
b. Schmitt trigger
c. Comparator
d. half adder
Q.165 The average value of sine wave is times the peak value.
Ans
a. 1.414
b. 0.637
c. 2.414
d. 1.732
Q.166 Identify the type of antenna shown in the following picture.
Ans
a. Yagi antenna
b. Circular antenna
c. Bi-pole antenna
d. Monopole antenna
Q.167 Sine Wave RMS = ______.
Ans
a. Peak voltage/Square root of 5
b. Peak voltage/Square root of 2
c. Peak voltage/Square root of 6
d. Peak voltage/Square root of 3
Q.168 The following figure represents a/an ______.
Ans
a. HEATER
b. FUSE
c. RESISTOR
d. CAPACITOR
Q.169 The power factor of a D.C. circuit is always
Ans
a. Leading
b. Unity
c. Lagging
d. zero
Q.170 In simple oscillators, are used.
Ans
a. UJTs
b. zener diodes
c. SCRs
d. TRIACS
Q.171 An LVDT is used for measuring
Ans
a. frequency
b. speed
c. temperature
d. displacement
Q.172 The gain of an amplifier with feedback is known as ______ gain.
Ans
a. High
b. Open loop
c. Closed loop
d. Low
Q.173 In case of an AC input signal in CE Transistor Load line can be given by a plot of
Ans
a. VCE & Ic
b. VBE vs Ic
c. VCE & Rc
d. VBE vs Ib
Q.174 The current towards a junction is:
Ans
a. twice the current towards the junction
b. equal to the current away from the junction
c. equal to the sum of currents towards the junction
d. not equal to the current away from the junction
Q.175 How can a higher voltage be obtained from a solar cell?
Ans
a. By connecting multiple cells in series
b. By increasing its thickness
c. By connecting multiple cells in parallel
d. By decreasing its thickness
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