GATE XE 2020 Paper 1 — page 43

Questions 127–129 of 175. Imported answers require review unless explicitly marked reviewed.

Glass fibre reinforced PP composite is to be prepared with 20 volume % of glass fibre. The densities of glass fibre and PP are 2540 kg m⁻³ and 900 kg m⁻³, respectively. The mass of glass fibre required to produce 1 kg of the composite in kg is ______ (round off to 2 decimal places).

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A polymer solution flows through a cylindrical tube with a diameter of 4 mm at a volumetric flow rate of 10⁻⁹ m³ s⁻¹. Under laminar flow condition and assuming the polymer solution to be a Newtonian fluid with viscosity 10² N s m⁻², the value of pressure drop per unit length of the tube in N m⁻³ is ______ (round off to nearest integer). [Consider the value of π as 3.14]

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A molten polymer with a bulk modulus of 1 GPa is pressurized to 200 MPa during injection molding. The fractional decrease in volume of the molten polymer at this pressurized condition is ______ (round off to 1 decimal place).

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2020 · Paper 1

Question 18

Question 19

Question 20