Indian Forest Service Mechanical Engineering Paper I 2020 Question Paper PDF

Central Government Jobs Engineer 2020

  • Year 2020
  • Conducted By UPSC
  • Questions 8
  • Maximum Marks 200
  • Duration Three Hours
  • Languages English

Exam Details

Detail Information
Examination Indian Forest Service (Main) Examination
Year 2020
Conducting Body UPSC
Paper Mechanical Engineering Paper - I
Subject Mechanical Engineering
Duration Three Hours
Maximum Marks 200
Number of Questions 8
Question Type Mixed

This is the Mechanical Engineering Paper - I for the Indian Forest Service (Main) Examination held in 2020 by UPSC. The paper carried a maximum of 200 marks and was to be completed within three hours. It consists of eight questions, out of which five are compulsory. Questions 1 and 5 are mandatory, and candidates must attempt three more questions from the remaining six, ensuring at least one from each of the two sections (A and B). The paper is designed to assess the in-depth knowledge of Mechanical Engineering principles relevant to the forest service. Aspirants can use this question paper for practice and to understand the exam pattern and difficulty level.

Major Topics Covered

  • V-belt drives
  • Flywheel dynamics
  • Longitudinal vibration
  • Stress and strain analysis
  • Material properties (Young's Modulus, Poisson's Ratio)
  • Heat treatment of steel
  • Surface hardening techniques (carburizing, nitriding, cyanide hardening)
  • Alloys vs. Composites
  • Composite strengthening mechanisms

Why This Paper is Important

  • Useful for Indian Forest Service (Main) 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

  • Indian Forest Service (Main) Examination 2020 Mechanical Engineering Paper - II
  • Indian Forest Service (Main) Examination 2019 Mechanical Engineering Paper - I
  • Engineering Services Examination 2020 Mechanical Engineering Paper - I
  • IFS 2020 Mechanical Engineering Paper I Answer Key
  • UPSC Mechanical Engineering Answer Key 2020
  • IFS Mechanical Engineering Syllabus
  • UPSC Main Exam Syllabus
  • IFS Exam Pattern

Instructions

  • There are EIGHT questions in all, out of which FIVE are to be attempted.
  • Out of the remaining SIX questions, THREE are to be attempted selecting at least ONE question from each of the two Sections A and B.
  • 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 Question-cum-Answer Booklet must be clearly struck off.
  • The number of marks carried by a question/part is indicated against it.
  • Unless otherwise mentioned, symbols and notations have their usual standard meanings.
  • Assume suitable data, if necessary and indicate the same clearly.
  • Neat sketch may be drawn, wherever required.
  • Answers must be written in ENGLISH only.

Questions (page 2)

Section A

Q1.

(a) A V-belt of 6. 5 cm2 cross-section has a groove angle of 30° and an angle of lap of 160° with coefficient of friction (mu) = 0. The mass of the rope is 1. 5 kg/m. The maximum safe stress is 850 N/cm^2. Calculate the power that can be transmitted at 25 m/s.

(b) A flywheel is mounted on a vertical shaft as shown in the figure. The ends of the shaft are being fixed. The shaft is 50 mm in diameter, the length l1 is 900 mm and l2 is 600 mm. The weight of the flywheel is 0.5 ton and its radius of gyration is 500 mm. Calculate the natural frequency of the longitudinal vibration of the system. Take Young's modulus (E) = 210 GPa.

(c) A steel rod 5 m long and 20 mm in diameter is subjected to an axial pull of 50 kN. Determine the change in volume of the rod. Take Young's modulus (E) = 210 GPa and Poisson's ratio ($
u$) = 0.

(d) What are the difficulties in hardening low carbon steel through heat treatment ? How can surface hardness be imparted through carburizing, nitriding and cyanide hardening ?

(e) What is the difference between an alloy and a composite ? Explain with the help of suitable examples. Also, cite the differences in strengthening mechanism for large particle and dispersion-strengthened composites.

Question paper preview

Scanned pages 1–2 for reference. Download the official PDF for the full paper.

Page 1
Indian Forest Service (Main) Exam 2020 Mechanical Engineering Paper I page 1 scan, showing UPSC exam details and instructions for candidates. PDF download available.
Page 2
Indian Forest Service (Main) Exam 2020 Mechanical Engineering Paper I page 1 scan, showing UPSC exam details and instructions for candidates. PDF download available.

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Frequently asked questions

What is the name of the exam for which this paper was conducted?

This paper is from the Indian Forest Service (Main) Examination.

Which year was this Indian Forest Service exam conducted?

The exam was conducted in the year 2020.

Who is the conducting body for the Indian Forest Service exam?

The Union Public Service Commission (UPSC) conducts the Indian Forest Service exam.

What is the subject and paper name for this question paper?

The subject is Mechanical Engineering, and the paper name is Mechanical Engineering Paper - I.

What is the maximum marks for this paper?

The maximum marks for this paper are 200.

What is the time duration allowed to complete this paper?

The time allowed to complete this paper is Three Hours.

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