Category: Chemical Engineering Basics

Two wires of the same radius & material having length in the ratio of 1 : 2 are stretched by the same force. The strain produced in the two wires will be in the ratio of__________________?

Hamad Chemical Engineering Basics 09/10/2020

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A. 1 : 1
B. 1 : 2
C. 2 : 1
D. 1 : 4

A semi-conductor is damaged & behaves like a conductor, on passing a strong electric current through it, because it heats up the crystals & breaks the covalent bonds resulting in _______________ electrons ?

Hamad Chemical Engineering Basics 08/10/2020

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A. Lack of free
B. Excess of
C. Decrease in
D. None of these

Wohler test is a destructive test to find out the ___________________ strength of a prepared metal specimen ?

Hamad Chemical Engineering Basics 08/10/2020

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A. Creep
B. Fatigue
C. Endurance
D. Tensile

A cylindrical rod subjected to a tensile strain within the elastic limit undergoes a volume change. If the volume strain is equal to half the tensile strain, then the Poisson’s ratio of the rod is___________________?

Hamad Chemical Engineering Basics 07/10/2020

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A. 0
B. 0.33
C. 0.44
D. 0.25

Depreciation of machines fails under the indirect expenses head. As per income tax regulations, it is calculated by the __________________ method?

Hamad Chemical Engineering Basics 07/10/2020

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A. Diminishing balance
B. Sinking fund
C. Multiple straight line
D. Sum of the years digit

In Newton’s law of viscosity, which states that the shear stress is proportional to the _____________ Co-efficient of viscosity is called dynamic or absolute viscosity(where, V = velocity, Vg = velocity gradient) ?

Hamad Chemical Engineering Basics 06/10/2020

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A. V2
B. 1/V2
C. 1/Vg
D. Vg

A material being tested for endurance strength is subjected to the _____________ load?

Hamad Chemical Engineering Basics 02/10/2020

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A. Impact
B. Completely reversed
C. Dynamic
D. Static & dynamic

In case of water (Prandtl number ≈ 6) flowing over a flat plate heated over the entire length, the thermal boundary layer thickness as compared to hydrodynamic boundary layer thickness is ?

Hamad Chemical Engineering Basics 01/10/2020

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A. Less
B. More
C. Equal
D. Unpredictable

Wood is a/an ______________ material ?

Hamad Chemical Engineering Basics 30/09/2020

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A. Amorphous
B. Cellular
C. Homogeneous
D. Granular

The specific gravity of coal depends mainly on its __________________ content ?

Hamad Chemical Engineering Basics 29/09/2020

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A. Carbon
B. Volatile matter
C. Ash
D. Moisture