## Interview MCQ Set 1

1. The unequal voltage distribution across individual unit of string of suspension insulator is __________

a) desirable and expressed by string efficiency

b) undesirable and expressed by string efficiency

c) desirable and expressed by impulse ratio

d) undesirable and expressed by impulse ratio

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2. Glass insulator cannot be used for voltage above __________

a) 25 KV

b) 11 KV

c) 33 KV

d) 50 KV

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3. Which of the following location is suitable to use shackle insulator?

a) Sharp Turn in transmission line

b) Dead end of low voltage distribution line

c) For bearing High Voltage transmission line conductor

d) Dead end of EHV transmission line

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4. Which of the following insulator is used for insulating stay wire from pole?

a) Pin type insulator

b) Shackle insulator

c) Suspension insulator

d) Stay insulator

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5. What is the reason for unequal distribution of voltage among different unit of suspension insulator?

a) Unequal capacitance of different units

b) Unequal distribution of charging current caused by stray capacitance

c) Unequal resistivity of different units

d) Dirt deposited over the insulator disc

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6. Arcing horns are used for ______________

a) protecting insulators from birds

b) protecting insulators from cracking or breaking due to flash over

c) improving string efficiency

d) protecting insulator from deposition of dirt

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7. What is the effect of rain on string efficiency?

a) It becomes very low

b) It reduces slightly

c) It does not changes

d) It is improved

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8. A suspension string have 3 units. Voltage across topmost and lower most unit of string are 6.71 volts and 11 volts respectively. What is the voltage across middle string, if voltage across whole string is 25.76 volts?

a) 103.47 volts

b) 8.05 volts

c) 83.6 volts

d) 25.76 volts

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9. If voltage across lowermost unit of a string is 34.8% of voltage across whole string and string efficiency is 57.46%. What is the voltage across whole string.

a) 100%of line voltage

b) 43.64% of line voltage

c) 75.2% of line voltage

d) 92.26% of line voltage

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10. By using which of the following method hundred percent string efficiency can be achieved?

a) Using long cross arms

b) Capacitance grading

c) Static shielding

d) 100% string efficiency cannot be achieved

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## Interview MCQ Set 2

1. Which of the following term is appropriate to the below figure ?

a) Large Data

b) Big Data

c) Dark Data

d) None of the mentioned

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2. Point out the correct statement:

a) Machine learning focuses on prediction, based on known properties learned from the training data

b) Data Cleaning focuses on prediction, based on known properties learned from the training data.

c) Representing data in a form which both mere mortals can understand and get valuable insights is as much a science as much as it is art

d) None of the Mentioned

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3. Which of the following characteristic of big data is relatively more concerned to data science ?

a) Velocity

b) Variety

c) Volume

d) None of the Mentioned

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4. Which of the following analytical capabilities are provide by information management company ?

a) Stream Computing

b) Content Management

c) Information Integration

d) All of the Mentioned

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5. Point out the wrong statement:

a) The big volume indeed represents Big Data

b) The data growth and social media explosion have changed how we look at the data

c) Big Data is just about lots of data

d) All of the Mentioned

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6. Which of the following step is performed by data scientist after acquiring the data ?

a) Data Cleansing

b) Data Integration

c) Data Replication

d) All of the Mentioned

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7. 3V’s are not sufficient To describe big data.

a) True

b) False

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8. Which of the following focuses on the discovery of (previously) unknown properties on the data ?

a) Data mining

b) Big Data

c) Data wrangling

d) Machine Learning

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9. Which of the following language should be replaced with the question mark in the below figure ?

a) Java

b) PHP

c) COBOL

d) None of the mentioned

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10. Beyond Volume, Variety and Velocity is the Issue of Big Data Veracity

a) True

b) False

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## Interview MCQ Set 3

1. What is the range for the stator slot pitch for the large hydro-electric generators?

a) 50-60 mm

b) 50-70 mm

c) 50-80 mm

d) 50-90 mm

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2. When is the range of the number of slots per pole per phase in the salient pole machines?

a) 2-3

b) 3-4

c) 2-4

d) 2-6

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3. Fractional windings are invariably used in synchronous machines?

a) true

b) false

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4. What is the relation between coil span and harmonics?

a) low coil span decreases harmonics to less amount

b) low coil span decreases the harmonics drastically

c) high coil span decreases the harmonics drastically

d) high coil span decreases the harmonics by small amount

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5. The coil span should be 8.33 percent of pole pitch to obtain the maximum reduction of harmonics?

a) true

b) false

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6. When is the formula for the flux per pole?

a) flux per pole = average magnetic field * pole pitch * length of the core

b) flux per pole = average magnetic field / pole pitch * length of the core

c) flux per pole = average magnetic field * pole pitch / length of the core

d) flux per pole = 1 / average magnetic field * pole pitch * length of the core

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7. What is the formula for the turns per phase in the armature design?

a) turns per phase = voltage per phase * parallel paths per phase / 4.44 * flux density * frequency * winding space factor

b) turns per phase = voltage per phase / parallel paths per phase * 4.44 * flux density * frequency * winding space factor

c) turns per phase = voltage per phase * parallel paths per phase * 4.44 * flux density * frequency * winding space factor

d) turns per phase = voltage per phase * parallel paths per phase * 4.44 * flux density / frequency * winding space factor

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8. What is the formula for current in each conductor?

a) current in each conductor = kVA * 103 * 3 * voltage per phase

b) current in each conductor = kVA / 103 * 3 * voltage per phase

c) current in each conductor = kVA * 103 / 3 * voltage per phase

d) current in each conductor = kVA * 103 * 3 / voltage per phase

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9. What is the permissible current density in the armature conductors?

a) 3-4 A per mm^{2}

b) 3-6 A per mm^{2}

c) 4-6 A per mm^{2}

d) 3-5 A per mm^{2}

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^{2}. The maximum allowed value of the current density in the armature conductors is 6 A per mm

^{2}.

10. What is the formula for the area of cross section of armature conductors?

a) area of cross section = current per conductor * current density in the armature conductors

b) area of cross section = current per conductor + current density in the armature conductors

c) area of cross section = current per conductor – current density in the armature conductors

d) area of cross section = current per conductor / current density in the armature conductors

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## Interview MCQ Set 4

1. An isolated generator connected to a turbine with its continuous maximum power of 20 MW, 50 Hz. Generator connected with two loads of 8 MW, each operate at 50 Hz.. Generator has 5% droop characteristic. If an additional load of 6 MW is added then the change in the frequency will be ____________

a) 0.25

b) 0.75

c) 0.5

d) 1

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2. For the given system the Ybus matrix is show below.

d) None of the mentioned

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3. If short TL is delivering a lagging power factor load, sending end p.f. would be ________

a) (V_{r}cosФ_{r}+IR)/Vs

b) (V_{r}cosФ_{r}+IRsinФ_{r})/Vs

c) (V_{r}sinФ_{r}+IR)/V_{s}

d) (V_{s}sinФr+IRcosФr)/V_{s}

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4. If all the sequence voltages at the fault point in a power system are equal, then fault is __________

a) LLG fault

b) LG fault

c) Three phase to ground fault

d) Line to Line fault

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5. The below mentioned graph is a recorded data of the voltage fluctuation of the network, then it can be concluded that these faults are __________

a) L-G

b) A three phase motor short

c) Feeder fault

d) Any of the mentioned

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6. The inertia constant of two groups of machines which do not swing together are 4 and 20 MJ/MVA, the equivalent inertia constant of the system is _________

a) 2.85

b) 14

c) 6

d) 12

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_{1}H

_{2}/(H

_{1}+H

_{2}).

7. A fault current of 1500A passing through the primary side of a 400/5 CT. On the secondary side an inverse time over current relay is connected whose current setting is 75%, the plug setting is __________

a) 5

b) 3.75

c) 6

d) 4

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8. The three phase line is working at 50 Hz with conductors rearranged as shown. The Cph of TL at 132 kV is ___________

a) 8.75*10^{-9}

b) 8.75*10^{-12}

c) 26.2*10^{-12}

d) 26.2*10^{-9}

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9. For a 100 MVA, 11 kV three phase Alternator observes a three phase fault at terminals of it. If the fault current is 2000 A, the pu value of positive sequence reactance ______

a) 2.62

b) 0.46

c) 1.31

d) 0.92

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10. A lossless TL having SIL of 3000 MW is provided with uniform distributed series capacitance compensation of 25% and shunt compensation of 30% then the SIL of compensated TL will be _______________

a) 3949.9

b) 3289

c) 2784.9

d) 2877.6

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^{2})/Z SIL α 1/Z Zcomp = Zs√((1-kse)/((1+ksh)(1-Klsh))) Kse = 0.25; Klsh = 0; Kcsh = 0.3, Zcomp =0.7595 SILcomp = 0.7595*3000 = 3949.96 MVA.

11. A lossless TL having SIL of 3000 MW is provided with uniform distributed series capacitance compensation of 25% and shunt compensation of 30% then the compensated impedance of TL will be(in pu) ____________

a) 0.7595

b) 2.88

c) 0.647

d) 3.27

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^{2})/Z SIL α 1/Z Zcomp = Zs√((1-kse)/((1+ksh)(1-Klsh))) Kse = 0.25; Klsh = 0; Kcsh = 0.3, Zcomp =0.7595.

## Interview MCQ Set 5

1. How many ways are there to represent the Cusum on the Cusum charts?

a) 3

b) 4

c) 2

d) 5

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2. Which of these is a name of any way to represent the Cusum charts?

a) Logarithmic

b) Algorithmic

c) Exponential

d) Normal

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3. The tabular Cusums are made to monitor the ____ of the process.

a) Variance

b) Mean

c) Standard deviation

d) Capability

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4. Which of these is not one of the assumptions made for the construction of Tabular Cusum charts for the individual measurements?

a) The selected variable varies according to a lognormal distribution

b) The selected variable varies according to a normal distribution

c) The selected variable varies according to a binomial distribution

d) The selected variable varies according to an exponential distribution

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5. Which of these is not an assumption made for the construction of the tabular Cusum charts?

a) The selected variable varies on a normal distribution

b) The mean of the normal distribution is available

c) The estimate or the exact value of the standard deviation of the variable

d) The assumptions are very inconsistent with phase II application of SPC

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6. If the process standard deviation increases, how will the cusum chart for monitoring process variability indicate the out-of-control state?

a) The value of S_{i}^{+} will increase

b) The value of S_{i}^{+} will decrease

c) The value of S_{i}^{–} will decrease with decrease in the value of S_{i}^{+}

d) The value of S_{i}^{–} will increase

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_{i}

^{+}value will be increased consequently. It will eventually exceed the decision interval h and we will get an out-of-control signal.

7. Which of these is an indication of out-of-control process with low standard deviation?

a) Increase in the value of S_{i}^{+}

b) Decrease in the value of S_{i}^{+} with increase in the value of S_{i}^{–}

c) Increase in the value of S_{i}^{–}

d) Decrease in the value of S_{i}^{–} with decrease in the value of S_{i}^{–}

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_{i}

^{–}will increase and eventually exceed the decision interval, h.

8. Who was the first person to recommend plotting the cusum charts for mean and standard deviation on same graph?

a) Hawkins

b) Roberts

c) Atkinson

d) Crowder

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9. If the deployment of the cusum is extended to the case of averages of the rational subgroups where sample size n>1, what will be done?

a) The value of x_{i} be replaced by x_{i}

b) The value of x_{i} be replaced by x_{i}

c) The value of C_{i}^{+} be replaced by value of C_{i}^{–}

d) The value of C_{i}^{–} be replaced by the value of C_{i}^{+}

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_{i}by x

_{i}and σ by σ/√n.

10. A cusum for normal variance is having the value of upper cusum equal to ___

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^{2}replaced by the sample variance S

_{i}

^{2}. It is expressed as,

11. A cusum for a normal variance has the value of lower cusum equal to ____

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12. If the value of C^{–}_{i-1}+S^{2}+k is lesser than (-1), what will be the value of C_{i}^{–} equal to?

a) Lesser than -1

b) Higher than 1

c) Lower than 0

d) 0

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^{–}

_{i-1}+S

^{2}+k is lesser than (-1), the value of C

_{i}

^{–}will be zero.

13. The V-mask procedure was proposed by ____

a) Crowder

b) Roberts

c) Brinson

d) Barnard

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14. Only the value of lower cusum can be negative.

a) True

b) False

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15. Tabular Cusums can be constructed for both, individual measurements, and the averages of the rational subgroups.

a) True

b) False