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Download PTU B-Tech AR-Automation-And-Robotics 2020 Dec 5th Sem 70482 Numerical Methods In Engineering Question Paper

Download PTU (I.K.Gujral Punjab Technical University (IKGPTU)) B-Tech (Bachelor of Technology) (AR)- Automation-And-Robotics 2020 December 5th Sem 70482 Numerical Methods In Engineering Previous Question Paper

This post was last modified on 13 February 2021

This download link is referred from the post: PTU B.Tech Question Papers 2020 December (All Branches)


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Roll No. β€˜ β€˜ ’ β€˜ β€˜ β€˜ ’ β€˜ β€˜ ’ β€˜ β€˜ β€˜ Total No. of Pages : 02
Total No. of Questions : 18

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B.Tech (Automation & Robotics) (2011 & Onwards) (Sem.-5)
NUMERICAL METHODS IN ENGINEERING
Subject Code : ME-309
M.Code : 70482
Time : 3 Hrs. Max. Marks : 60

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INSTRUCTIONS TO CANDIDATES :

  1. SECTION-A is COMPULSORY consisting of TEN questions carrying TWO marks each.
  2. SECTION-B contains FIVE questions carrying FIVE marks each and students have to attempt ANY FOUR questions.
  3. SECTION-C contains THREE questions carrying TEN marks each and students have to attempt ANY TWO questions.

SECTION-A

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Answer the following :

  1. Define a cubic spline interpolant with natural boundary.
  2. What do we mean by unconditionally stable method?
  3. Find the condition number of the function f(x) = cos x.
  4. Determine the Lagrange interpolating-polynomial passing through the points (2,4) and (5,3).
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  6. Out of chopping of numbers and rounding off of numbers, which one introduce less error? Explain suitably.
  7. Find the l1 norm of the vector (1,√6,3)T.
  8. What is the order of convergence when Newton Raphson's method is applied to the equation x2 β€” 6x + 9 = 0 to find its multiple root.
  9. Use the forward-difference formula to approximate the derivative of f(x) = ln x at x0=1.8 using h =0.01.
  10. Compute ∫ x sin x dx using Simpson’s rule.
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  12. Explain Lagrange's interpolation.

SECTION-B

  1. Use Euler’s method to approximate the solution of the following initial value problem y' = y - t2, 1 < t < 2, y(1)=1, h=0.1.
  2. Construct a clamped spline S(x) which passes through the points (1,2), (2,3) and (3,5) that has S'(1)=2 and S'(3) = 1.
  3. The following data is given :
    x 1.0 1.3 1.6 1.9 2.2
    f(x) 0.7651977 0.6200860 0.4554022 0.2818186 0.1103623
    Use Lagrange’s formula to approximate f(1.5).
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  5. Let f(x) = (x cos x β€” sin x)/(x β€” sin x). Use four digit rounding arithmetic to evaluate f(0.1). The actual value is f(0.1) =-1.99899998, using this value find the relative error.
  6. Use backward-difference method with steps sizes h = 0.1 and k = 0.01 to approximate the solution to the heat equation βˆ‚u/βˆ‚t(x,t) = βˆ‚2u/βˆ‚x2(x,t) = 0, 0 < x < 1, t β‰₯ 0, with boundary conditions u(0,t)=u(1,t)=0, t>0, u(x,0) =sin(Ο€x), 0 < x < 1.

SECTION-C

  1. Determine the values of h that will ensure an approximation error of less than 0.00002 when approximating ∫ sin x dx and employing:
    1. Composite trapezoidal rule:
    2. Composite Simpson's rule.
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  2. Draw the graph of 4x = tan x. Use Newton's method to find the first two positive roots of 4x = tan x (Note: You can use the graph drawn for selecting your initial guesses.).
  3. Use Gauss elimination method with scaled partial pivoting to solve the following linear system of equations 2.11x1 - 4.21x2 + 0.921x3 = 2.01,
    4.01x1 + 1.02x2 - 1.12x3 = -3.09,
    1.09x1 + 0.987x2 + 0.832x3 = 4.21.
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NOTE : Disclosure of identity by writing mobile number or making passing request on any page of Answer sheet will lead to UMC case against the Student.

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This download link is referred from the post: PTU B.Tech Question Papers 2020 December (All Branches)