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GATE Prev Year : Engineering Materials Test-5
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Question 1
An evaporator is required to move 1000kgh-1 of liquid from a milk stream. Steam is available for heating the evaporator at a pressure of 70.1 kPa absolute and a temperature of 900C. The vapour, into which the water is evaporated from the milk, is at a pressure of 47.4kPa absolute and a temperature of 800C.
If there are 50 tubes with an internal diameter of 50mm having a length 3m with thickness as 3mm, then find the heat of vaporization for water/steam.
Question 2
What will be the general expression of finding the mass transfer coefficient for the evaporation?
Question 3
If stress values is measured during the tensile test, then which of the following have higher actual value than initial value?
Question 4
The effective number of lattice points in the unit cell of simple cubic, body centered cubic, and face centered cubic space lattices, respectively, are
Question 5
In a Brinell hardness test, a 1500 kg load is pressed into a specimen using a 10 mm diameter hardened steel ball. The resulting indentation has a diameter = 3.2 mm. What will be the BHN for the metal?
Question 6
Which types of stress strain relationship best describes the behaviour of brittle materials as ceramics and thermosetting plastics?
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