Indian Forest Service 2021 Mechanical Engineering Paper I PDF

Central Government Jobs Engineer 2021

  • Year 2021
  • Conducted By UPSC
  • Questions 8
  • Maximum Marks 200
  • Duration Three Hours
  • Languages English

Exam Details

Detail Information
Examination Indian Forest Service (Main) Examination
Year 2021
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 official question paper for the Indian Forest Service (Main) Examination 2021, Paper I, focusing on Mechanical Engineering. Conducted by UPSC, this paper is designed to test candidates' in-depth knowledge in the subject. It comprises a total of 8 questions, with candidates required to attempt 5, including compulsory questions 1 and 5. The exam duration is three hours, and it carries a maximum of 200 marks. This paper is crucial for aspirants aiming to qualify for the prestigious Indian Forest Service.

Major Topics Covered

  • Governor
  • Bravais Crystal Systems
  • Miller Indices
  • Stress-Strain Analysis
  • Material Properties
  • Oscillations

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 I
  • Indian Forest Service (Main) Examination 2022 Mechanical Engineering Paper I
  • Engineering Services Examination 2021 Mechanical Engineering Paper I
  • Indian Forest Service (Main) Examination 2021 Mechanical Engineering Paper I Answer Key
  • Indian Forest Service Mechanical Engineering Syllabus
  • UPSC Engineering Subjects Syllabus
  • Indian Forest Service Exam Pattern
  • UPSC Main 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 sketches may be drawn, wherever required.
  • Answers must be written in ENGLISH only.

Questions (page 2)

Section A

Q1.

(a) The Porter governor has equal arms each 300 mm long and pivoted on the axis of rotation. Each ball has a mass of 5 kg and the mass of the sleeve is 20 kg. The radius of rotation of the ball is 150 mm when the governor begins to lift and 200 mm when the governor is at maximum speed. Find the range of speed of the governor.

(b) A U tube open to atmosphere at both ends contains a column length l of a certain liquid. Find the natural frequency of oscillation of the liquid column.

(c) A member formed by connecting a steel bar to an aluminium bar is shown in the figure below. Calculate the magnitude of the force P that will cause the total length of the bar to decrease by 0.5 mm. The Young's modulus for steel and aluminium are 2 × 105 MPa and 7 × 104 MPa respectively. The cross-sectional area of the steel bar is 25 cm2 and of the aluminium bar is 100 cm2.

(d) Enlist the different Bravais crystal systems. Also write the relationship between their primitives and between their angles.

(e) Determine the Miller indices of a set of parallel planes, which create intercepts in the ratio of 2a : 3b and parallel to the z-axis. Consider the lattice to be cubic with a = b = c = 4 Å. Calculate the interplanar spacing of the planes.

Question paper preview

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Indian Forest Service 2021 Mechanical Engineering Paper I question paper page 1 instructions scan PDF download
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Indian Forest Service 2021 Mechanical Engineering Paper I question paper page 1 instructions scan PDF download

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Frequently asked questions

What is the full name of the exam?

The full name of the exam is the Indian Forest Service (Main) Examination.

Which year is this question paper from?

This question paper is from the year 2021.

Who conducts the Indian Forest Service Examination?

The Indian Forest Service Examination is conducted by UPSC (Union Public Service Commission).

What is the subject of this paper?

This paper is for Mechanical Engineering, specifically Paper - I.

What is the duration of the exam?

The time allowed for this paper is Three Hours.

What are the maximum marks for this paper?

The maximum marks for this paper are 200.

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