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.Management Sciences
Category: Chemical Engineering Basics
What is the range of tempering temperature (°C) for most of the materials ?
A. 75-100
B. 200-300
C. 350-450
D. 500-600
Increasing the carbon content of steel_________________?
A. Reduces the upper shelf energy
B. Increasing the ductility transition temperature
C. Decreases brittleness
D. Decreases hardness
Insulation of liquid surface can be achieved by _____________ on top of its surface?
A. Floating hollow polypropylene spheres
B. Spraying alumina powder
C. Putting cement
D. None of these
Fatigue resistance of a material is measured by the _____________________?
A. Elastic limit
B. Ultimate tensile strength
C. Young’s modulus
D. Endurance limit
An example of unsteady non uniform flow is the flow of liquid under pressure through a__________________?
A. Tapering pipe at constant flow rate
B. Tapering pipe at either decreasing or increasing flow rate
C. Long pipeline of constant diameter
D. None of these
In chemical dehumidification of air___________________?
A. Both specific humidity & dry bulb temperature increases
B. Both specific humidity & dry bulb temperature decreases
C. Specific humidity decreases & dry bulb temperature increases
D. Specific humidity increases & dry bulb temperature decreases
Pick out the wrong statement about nucleate boiling ?
A. Bubble generation is by expansion of entrapped gas/vapour at small cavities in the surface
B. Surface temperature is greater than the saturation temperature of the liquid
C. Heat transfer from the surface of the liquid is less than that in film boiling
D. The temperature is less than that of film boiling
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