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.Management Sciences
Category: Chemical Engineering Basics
Sacrificial anode method is used in the protection of pipelines which are buried underground. Sacrificial anode________________?
A. Occurs higher in the electro-chemical series of metals
B. Is exemplified by magnesium plate
C. Is much cheaper than the cathodic base material to be guarded against corrosion
D. All A, B. & C.
Which of the following can be manufactured using powder metallurgy techniques ?
A. Brake linings
B. Bearings
C. Carbide tool tips
D. All A, B and C
The most detrimental impurity in high pressure boiler feed water is ___________________?
A. Suspended salt
B. Dissolved salt
C. Silica
D. Turbidity
The thickness of oxide film is y at time t. If K1, K2 and K3 are the temperature dependent constants, the parabolic law of oxidation is given by __________________?
A. y2 = 2k1t + k2
B. y = k1 ln (k2t + k3)
C. y = k1 t + k2
D. y = k1t3 + k2
Which of the following gases cause global warming ?
A. Carbon monoxide
B. Carbon dioxide
C. Nitrogen
D. Ozone
The emf of a Deniell cell “Zn | Zn2+ || Cu2+ | Cu” can be increased by_________________?
A. Decreasing the surface area of the electrodes
B. Increasing the concentration of zinc sulphate solution
C. Increasing the surface area of the electrodes
D. Increasing the concentration of copper sulphate solution
Alloys having more than 80% copper are generally more______________________?
A. Abrasion resistant
B. Corrosion resistant
C. Prone to season cracking
D. Machinable
Gas turbine normally employs a constant _______________ cycle?
A. Pressure
B. Temperature
C. Volume
D. None of these
The property of material, by which a given amount of energy is absorbed by it, without plastic deformation, is called__________________?
A. Resilience
B. Toughness
C. Ductility
D. Impact strength
Magnesium is present in___________________?
A. Haemoglobin
B. Chlorophyll
C. Hypo solution
D. None of these
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