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.Management Sciences
Category: Chemical Engineering Basics
Heat transfer to the water wall in a high pressure water wall type boiler furnace is mainly by_________________?
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A. Conduction
B. Convection
C. Radiation
D. Both A. & B.
Rain drops falling through atmospheric air attain limited terminal velocity, because of ____________________?
A. Upward thrust due to air
B. Viscous force exerted by air
C. Surface tension effects of water
D. Force of gravity
Oxyacetylene reducing flame is used while carrying out welding on__________________?
A. Alloy steel
B. Grey cast iron
C. Mild steel
D. High carbon steel
Which of the following is the largest quantum of pressure ?
A. 1 kg/cm2
B. 1 bar
C. 1 atmosphere
D. 1 kilo Pascal
Thermit welding uses the following energy source ?
A. Electrical energy
B. Chemical energy
C. Energy of high velocity electrons
D. Heat generated by friction
The burnout heat flux in the nucleate boiling regime is not a function of the_________________?
A. Liquid density
B. Vapour density
C. Temperature difference
D. Heat of evaporation
Which of the following metals is not subjected to electrolytic refining/purification ?
A. Copper
B. Zinc
C. Tin
D. Aluminium
____________ test is the appropriate test to determine whether a material is ductile or brittle ?
A. Impact
B. Cupping
C. Hardness
D. Tensile
Titanium is added to molten aluminium alloys before casting for the purpose of_____________________?
A. Grain refinement
B. Increasing corrosion resistance
C. Reducing porosity
D. Improving fluidity
As per the Indian boiler regulation (IBR), the type of joint preferred for the circumferential joint is the _____________ joint ?
A. Butt
B. Lap
C. Welded
D. None of these
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