A. Lead
B. Glass
C. Mica
D. Silver
✅ The correct answer is option A.
Basic Chemical Engineering MCQs
Fibre glass is a composite material of
A. Glass fibre in a polymer matrix
B. Glass fibre in a metallic matrix
C. Polymer fibre in a glassy matrix
D. Both B & C
✅ The correct answer is option A.
Austempering of steel requires.it to be heated to 875°C followed by sudden cooling to 250-525°C, thereby changing austenite to
A. Sorbite
B. Bainite
C. Martensite
D. Troostite
✅ The correct answer is option B.
Diamagnetic materials
A. Are magnetised by eddy currents only
B. Are non-magnetic and can not be magnetised
C. Are magnetised in direction opposite to the magnetic field
D. Can be magnetised in one direction only
✅ The correct answer is option C.
__________ number determines whether the fluid flow in an open channel is supercritical, critical or sub-critical.
A. Mach
B. Reynolds
C. Froude
D. Weber
✅ The correct answer is option C.
What is the critical radius of insulation (cms) for a metallic cylinder, if the convective heat transfer co-efficient with the ambient atmosphere is 5 W/m². °K ? Thermal conductivity of metal and insulation material are 40 and 0.1 W/m.°K respectively.
A. 2
B. 5
C. 10
D. 20
✅ The correct answer is option A.
__________ is the trade name assigned to a non-ferrous cast alloy composed of cobalt, chromium & tungsten.
A. Stellite
B. High speed steel
C. Cermet
D. Alnico
✅ The correct answer is option A.
Thermal conductivity of a material does not depend upon its
A. Mass
B. Volume
C. Surface area
D. All of the above
✅ The correct answer is option D.
Alumina, silica, lime and iron oxide are the basic raw material for the manufacture of portland cement. The component of Portland cement which first hardens is
A. 5CaO . 3 Al2O₃
B. 3CaO . Al2O₃
C. 3CaO . SiO₂
D. 2CaO . SiO₂
✅ The correct answer is option A.
__________ cycle is the most efficient thermodynamic cycle.
A. Diesel
B. Otto
C. Rankine
D. Carnot
✅ The correct answer is option D.