Electrical Engineering Paper-II

Central Government Jobs Engineer 2018

  • Year 2018
  • Questions 8
  • Maximum Marks 300
  • Duration Three Hours Maximum Marks: 300 Question Paper Specific Instructions Please Read Each Of The Following Instructions Carefully Before Attempting Questions There Are Eight Questions Divided In Two Sections. Candidate Has To Attempt Five Questions In All. Question Nos. 1 And 5 Are Compulsory And Out Of The Remaining, Three Are To Be Attempted Choosing At Least One Question From Each Section. The Number Of Marks Carried By A Question/part Is Indicated Against It. Assume Suitable Data, If Considered Necessary And Indicate The Same Clearly. Unless Otherwise Mentioned, Symbols And Notations Carry Their Usual Standard Meanings. Attempts Of Questions Shall Be Counted In Sequential Order. Unless Struck Off, Attempt Of A Question Shall Be Counted Even If Attempted Partly. Any Page Or Portion Of The Page Left Blank In The Qca Booklet Must Be Clearly Struck Off. Answers Must Be Written In English Only. Ypo-b-fptf/57
  • Languages English

Exam Details

Detail Information
Examination Engineering Services Examination
Year 2018
Paper Electrical Engineering Paper-II
Subject Electrical Engineering
Duration Three Hours Maximum Marks: 300 Question Paper Specific Instructions Please Read Each Of The Following Instructions Carefully Before Attempting Questions There Are Eight Questions Divided In Two Sections. Candidate Has To Attempt Five Questions In All. Question Nos. 1 And 5 Are Compulsory And Out Of The Remaining, Three Are To Be Attempted Choosing At Least One Question From Each Section. The Number Of Marks Carried By A Question/part Is Indicated Against It. Assume Suitable Data, If Considered Necessary And Indicate The Same Clearly. Unless Otherwise Mentioned, Symbols And Notations Carry Their Usual Standard Meanings. Attempts Of Questions Shall Be Counted In Sequential Order. Unless Struck Off, Attempt Of A Question Shall Be Counted Even If Attempted Partly. Any Page Or Portion Of The Page Left Blank In The Qca Booklet Must Be Clearly Struck Off. Answers Must Be Written In English Only. Ypo-b-fptf/57
Maximum Marks 300
Number of Questions 8
Question Type Objective (MCQ)

This document reproduces the UPSC/Engineering Services Examination Electrical Engineering Paper-II (2018). Page 1 contains the exam header and instructions: eight questions in two sections, candidates to answer five, with questions 1 and 5 compulsory, and answers to be written in English. Page 2 (and repair OCR) provides Section A with multi-part and standalone questions spanning power electronics (firing-angle problems), control systems (open-loop with G(s) and K(s) components), electrical machines (rotor time constants), transmission potentials, and signal processing (CTFT of square pulses, and CTFTs of piecewise signals). The objective_questions_preview captures the numbered questions, each as separate items, and the analysis requires clear separation of stems and subparts. The content emphasizes calculations and conceptual explanations across power electronics, control theory, machine dynamics, and Fourier analysis.

Major Topics Covered

  • Power Electronics
  • Control Systems
  • Electrical Machines
  • Transmission and Distribution
  • Fourier Transform
  • Signal Processing
  • Laplace and CTFT
  • System Dynamics
  • Firing Angle Calculations
  • Open-loop and Cascade Control
  • Rotor Time Constant
  • Mechanical Time Constant
  • Circuit Diagrams and Waveforms
  • DC and AC Analysis
  • Reactive Power and Power Factor
  • Poles and Zeros in Transfer Functions
  • Steady-state and Transient Analysis
  • Electrical Measurements
  • Frequency Domain

Why This Paper is Important

  • Useful for Engineering Services Examination preparation
  • Helps understand the latest exam pattern
  • Useful for practice and self-assessment
  • Covers frequently asked General Studies topics
  • Helpful for analysing question trends

Related Resources

Instructions

  • There are EIGHT questions divided in two Sections.
  • Candidate has to attempt FIVE questions in all.
  • Question Nos. 1 and 5 are compulsory and out of the remaining, THREE are to be attempted choosing at least ONE question from each Section.
  • The number of marks carried by a question/part is indicated against it.
  • Assume suitable data, if considered necessary and indicate the same clearly.
  • Unless otherwise mentioned, symbols and notations carry their usual standard meanings.
  • Attempts of questions shall be counted in sequential order.
  • Unless struck off, attempt of a question shall be counted even if attempted partly.
  • Any page or portion of the page left blank in the QCA Booklet must be clearly struck off.
  • Answers must be written in ENGLISH only.

Questions (page 2)

Q1. A single-phase AC voltage controller is feeding a resistive load of 26.45 Ω from
1. an AC source of 230 V, 50 Hz. Compute the firing angle to deliver 1000 W to the load. Also compute the p.f. at which this power is delivered. Draw a neat circuit diagram and waveforms of voltage at load terminals with current flowing in the load. An open-loop system G(s) = 1/[s2 (rs+1)] is placed in cascade with a proportional (b) and derivative controller K(s) = (1 + Td s). If their unity feedback closed-loop system oscillates at a frequency of sqrt
(2) rad/second, find the ranges/values of the system and controller parameters, i.e., ranges/values of K, Td and τ.

Q4. An electric train running between two stations A and B, 10 km apart and maintained at voltages 550 V and 500 V respectively, draws a constant current of 600 A. The resistance for both go and return conductors is 0.04 Ω/km. Find the point of minimum potential between the stations, the voltage at that point and currents drawn from both the stations at that point.

Q5. The continuous-time Fourier transform (CTFT) of a square pulse defined by x(t) = 1 for -0.5 ≤ t ≤ 0.5 is given by X(ω) = sin(ω/2)/(ω/2). Use the properties of CTFT and synthesize the equation, and find the CTFT of the following signals y(t) and z(t):
y(t) = 2, for 0 ≤ t < 1; -2, for 1 ≤ t ≤ 2; 0 elsewhere
z(t) → [ 0 1 2 3 ; 1 2 3 ]

Q12. 12 Determine the mechanical time constant of rotor of an electrical machine
(c) in terms of its moment of inertia J kg-m2 and windage cum friction coefficient f N-m/rad/s. Also explain the method to determine mechanical time constant experimentally in laboratory.

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Frequently asked questions

How many questions must be attempted?

Five questions must be attempted in total.

Which questions are compulsory?

Questions 1 and 5 are compulsory.

From how many sections are questions drawn?

There are two sections in the paper.

In what language must answers be written?

Answers must be written in English.

Is there a fixed maximum marks for each question?

The marks for each question are indicated against it in the paper.

Where can you draw diagrams or waveforms?

If required by the question, you may draw circuit diagrams and waveforms as part of your answer.

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