Indian Forest Service 2019 Mechanical Engineering Paper-I PDF

Central Government Jobs Engineer 2019

  • Year 2019
  • Conducted By UPSC
  • Maximum Marks 200
  • Duration Three Hours
  • Languages English

Exam Details

Detail Information
Examination Indian Forest Service (Main) Examination
Year 2019
Conducting Body UPSC
Paper Mechanical Engineering Paper-I
Subject Mechanical Engineering
Duration Three Hours
Maximum Marks 200
Question Type Descriptive / Subjective

This is the Mechanical Engineering Paper-I from the Indian Forest Service (Main) Examination held in 2019 by UPSC. The paper is designed to test the in-depth knowledge of Mechanical Engineering concepts. It allows three hours for completion and carries a maximum of 200 marks. The paper consists of descriptive questions, requiring detailed answers and explanations. Aspirants can use this question paper to understand the exam's scope, question types, and difficulty level, aiding in their preparation strategy for the IFS Main exam.

Major Topics Covered

  • Killed steels and rimmed steels
  • Belt drives
  • Gear tooth profiles
  • Sliding contact bearings
  • Compound bars and thermal stress
  • Elastic and plastic deformation
  • Shear force and bending moment diagrams
  • Helical springs

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 2018 Mechanical Engineering Paper-I
  • Engineering Services Examination 2019 Mechanical Engineering Paper-I
  • UPSC Mechanical Engineering Previous Year Papers
  • Indian Forest Service 2019 Mechanical Engineering Paper-I Answer Key
  • Indian Forest Service Mechanical Engineering Syllabus
  • UPSC Mechanical Engineering Syllabus
  • Indian Forest Service 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.
  • 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.
  • 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.
  • Answers must be written in ENGLISH only.

Questions (page 2)

Section A

Q1.

(a) What are meant by killed steels and rimmed steels? Explain the characteristics of these steels. Enlist its applications.

(b) A flat belt transmits 10 kW power at a speed of 5 \text m/s. The mass of the belt is 1.5 \text kg/m and the angle of lap at smaller pulley is 200°. The coefficient of friction between the belt and the pulley is 0.30. Determine the initial tension in the belt.

(c) Compare between involute and cycloidal gear tooth profiles. List the important properties of a good material for sliding contact bearing.

(d) A compound bar is constructed from three bars 50 mm wide by 12 mm thick fastened together to form a bar 50 mm wide by 36 mm thick. The middle bar is of aluminium alloy for which E = 70 × 109 N/m2 and the outside bars are of brass with E = 100 × 109 N/m2. If the bars are initially fastened at 18 °C and the temperature of the whole assembly is then raised to 50 °C, determine the stresses set up in the brass and the aluminium alloy. Take the coefficient of expansion of the brass (α_B) and the aluminium alloy (α_A) as follows : α_B = 18 × 10-6 per °C and α_A = 22 × 10-6 per °C

(e) State the difference between elastic and plastic deformation. Explain each in detail.

Section A

Q2.

(a) A beam ABC is 9 m long and supported at B and C, 6 m apart as shown in the figure below. The beam carries a triangular distribution of load over the portion BC together with an applied counterclockwise couple of moment 80 kN-m at B and a uniformly distributed load of 10 kN/m over AB. Draw the shear force and bending moment diagrams for the beam: 10 kN/m
48 kN/m
3 m
6 m
B
C
A

(b) Determine the load required to produce an extension of 8 mm on an open-coiled helical spring of 10 coils of mean diameter 76 mm, with helix angle of 20° and manufactured from wire of 6 mm diameter. What will then be the bending and shear stresses in the surface of the wire? For the material of the spring, E = 210 × 109 N/m2 and G = 70 × 109 N/m2. What would be the angular twist at the free end of the above spring when subjected to an axial torque of 1.5 N-m?

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Frequently asked questions

What is the name of the exam?

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

What year was this paper from?

This question paper is from the 2019 examination.

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 maximum marks for this paper?

The maximum marks for Mechanical Engineering Paper-I is 200.

What is the time duration allowed for this paper?

The time allowed for this paper is Three Hours.

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