A. Malleable
B. Nodular
C. Ductile
D. Grey
✅ The correct answer is option A.
Engineering MCQs
For a first order chemical reaction, the concentration of the reactant decreases __________ with time.
A. Linearly
B. Exponentially
C. Logarithmically
D. Inversely
✅ The correct answer is option A.
The malleability of a material is the property by virtue of which it can be rolled or hammered into thin sheets. Which of the following materials has the maximum malleability ?
A. Lead
B. Copper
C. Aluminium
D. Wrought iron
✅ The correct answer is option A.
Machinability of hard alloys and tool steels is improved by
A. Spherodising
B. Annealing
C. Tempering
D. Normalising
✅ The correct answer is option B.
There are one octahedral void and __________ tetrahedral void in the closest packing of atoms.
A. One
B. Two
C. Three
D. None of these
✅ The correct answer is option B.
Which of the following commonly used condenser tube materials has the lowest thermal conductivity?
A. Admirability brass
B. Stainless steel
C. Aluminium brass
D. Titanium
✅ The correct answer is option B.
Catalyst used in the ‘catalytic converter’ employed in automobile exhaust line for complete combustion/oxidation of carbon monoxide, nitrogen oxides and hydrocarbons is
A. Alumina
B. Platinum
C. Vanadium pentoxide
D. Iron oxide
✅ The correct answer is option B.
A reduction process is accompanied with increase in the
A. Number of electrons
B. Oxidation number
C. Both A & B
D. Neither A nor B
✅ The correct answer is option A.
The weight of a body at the centre of the earth is
A. Infinite
B. Zero
C. Same as on the surface of the earth
D. None of these
✅ The correct answer is option B.
Water-tube boiler is the one, in which
A. Water passes through tubes and flue gases around it
B. Tube carrying hot flue gases are immersed in a pool of water
C. Tubes are placed in vertical position
D. None of these
✅ The correct answer is option A.