Indian Forest Service 2021 Chemical Engineering Paper I Question Paper 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 Chemical Engineering Paper - I
Subject Chemical 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, specifically for Chemical Engineering Paper - I. Conducted by UPSC, this paper carries a maximum of 200 marks and is allocated a time duration of three hours. It consists of eight questions, of which five are to be attempted, with questions 1 and 5 being compulsory. Aspirants must select at least one question from each of the two sections (A and B) from the remaining six questions. This paper is crucial for candidates aiming for a career in forest services and requires a strong understanding of chemical engineering principles.

Major Topics Covered

  • Bernoulli Equation
  • Bond Crushing Law
  • Work Index
  • Azeotrope
  • Heat Transfer
  • Radiation Exchange
  • Stripping
  • Chemical Engineering Principles

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 Chemical Engineering Paper I
  • Indian Forest Service (Main) Examination 2022 Chemical Engineering Paper I
  • Engineering Services Examination 2021 Chemical Engineering Paper I
  • Indian Forest Service (Main) Examination 2021 Chemical Engineering Paper I Answer Key
  • Indian Forest Service (Main) Examination Chemical Engineering Syllabus
  • UPSC Chemical Engineering Syllabus
  • Indian Forest Service (Main) Examination Pattern
  • UPSC 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) What are the limitations on the use of Bernoulli Equation ? Explain any three.

(b) State Bond Crushing Law and define Work Index. What is the power required to crush 100 ton/h of limestone if 80 percent of the feed passes a 2-in. screen and 80 percent of the product a 1/8-in. screen?

(c) What is an azeotrope? Draw a schematic of T-x-y diagram for minimum boiling azeotrope and maximum boiling azeotrope. Also draw the schematic of corresponding equilibrium curve diagram.

(d) For steady state conduction in one dimension, derive rate of heat transfer through hollow sphere. Assume suitable notations, wherever necessary.

(e) Derive an expression of Radiation Exchange in a two-surface Gray enclosure-
(Q1net)/(A1) = (σ T14 - T24 ))/((1)/(\epsilon1) + (1)/(\epsilon2) - 1)

Section A

Q2.

(a) Propane is to be stripped from a non-volatile oil by steam in a counter-current tower. Four moles of steam is supplied at the bottom of the tower for every 100 moles of oil-propane feed at the top. The oil originally contains 2.55 mole% propane, and this concentration needs to be reduced to 0.25 mole%. The tower is maintained at 135°C and 4 atm. absolute pressure. The molecular weight of the heavy oil is 300, and the molecular weight of propane is 44. The equilibrium relationship is y = 24x, where y = mole fraction of propane in vapour and x = mole fraction of propane in liquid. Find the number of equilibrium stages.

Question paper preview

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

Page 1
Indian Forest Service Main 2021 Chemical Engineering Paper I question paper page 1 instructions scan PDF download
Page 2
Indian Forest Service Main 2021 Chemical Engineering Paper I question paper page 1 instructions scan PDF download

Free question paper download

Download question paper PDF

  • 3.5 MB
  • 10 pages
  • PDF format

Frequently asked questions

What is the name of the exam?

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

What is the year of this question paper?

This question paper is from the year 2021.

Which paper is this question paper for?

This is for Chemical Engineering Paper - I.

Who conducts the Indian Forest Service Examination?

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

What is the maximum marks for this paper?

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

What is the time allowed for this paper?

The time allowed for this paper is Three Hours.

← Back to Engineer papers