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.Management Sciences
Category: Chemical Engineering Basics
Maximum amount of thermal radiation is emitted at all wavelengths at any specified temperature by a/an ______________ body?
A. Grey
B. Black
C. Opaque
D. White
Lead is poured into the joint between two ______________ pipes?
A. Mild steel
B. Concrete
C. Cast iron
D. Asbestos cement
Circular cross section machine parts which are symmetrical about the axis of rotation are made by hot_____________________?
A. Piercing
B. Spinning
C. Drawing
D. Extrusion
Removal of non-condensable from steam or other vapour is termed as the ________________ process?
A. Condensation
B. Deaeration
C. Scavenging
D. Exhaust
Wavelength of radiation emitted by a body depends on the ________________ of its surface?
A. Temperature
B. Area
C. Nature
D. All ‘A’, ‘B’ & ‘C’
Steels with high carbon equivalent have poor Weldability, because in these steels during welding________________?
A. Carbon and other alloying elements get oxidised from the weld pool
B. Excessive ferrite forms in the heat affected zone leading to poor toughness of the weld
C. Martensite forms in the heat affected zone leading to poor toughness/ductility of the weld
D. Segregation of carbon and other element occurs in the weld pool leading to poor properties of
the weld
Heat release during phase change is observed in case of a/an_________________?
A. Boiler
B. Condenser
C. Evaporator
D. All A. B. & C.
All of the following alloying elements of steel increases hardness but sacrifice ductility, except________________?
A. Nickel
B. Vanadium
C. Molybdenum
D. Chromium
Nusselt number/Biot number varies___________________?
A. Inversely with thermal conductivity
B. Directly with heat transfer co-efficient
C. Directly with thermal conductivity
D. Inversely with the dimension of the solid
In connection with corrosion of metals, passivation is the process that__________________?
A. Intensifies deterioration
B. Changes the composition of the metal
C. Inhibits further deterioration
D. None of these
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