A. Emissivity of pipe surface
B. Diameter & length of the pipe
C. Temperature of hot pipe surface & that of air in the room
D. None of these
✅ The correct answer is option D.
Basic Chemical Engineering MCQs
Materials having resistivity ranging from 1 to 100 ohm. cm is termed as
A. Conductor
B. Insulator
C. Semi-conductor
D. None of these
✅ The correct answer is option C.
Fahrenheit and Centigrade scales have the same readings at
A. -55°
B. -40°
C. -33°
D. -58°
✅ The correct answer is option B.
High speed steel tools retain their hardness upto a temperature of __________ °C.
A. 500
B. 750
C. 900
D. 1100
✅ The correct answer is option C.
When metals are heated to high temperature, their __________ increases in general.
A. Atomic vibration
B. Creep strength
C. Yield stress & ultimate tensile strength
D. Toughness & stiffness
✅ The correct answer is option A.
Transition from laminar flow to turbulent flow in fluid flow through a pipe does not depend upon the
A. Length of the pipe
B. Diameter of the pipe
C. Density of the fluid
D. Velocity of the fluid
✅ The correct answer is option A.
Electrostatic separation of minerals from each other is based on their differences in the following property.
A. Densities
B. Magnetic permeabilities
C. Electrical conductivities
D. Hardness
✅ The correct answer is option C.
Which of the following alloying elements is present in maximum percentage in high speed steel.
A. Molybdenum
B. Chromium
C. Tungsten
D. Vanadium
✅ The correct answer is option A.
__________ is not a heat treatment process.
A. Cyaniding
B. Pakerising
C. Austempering
D. Martempering
✅ The correct answer is option B.
Ceramic materials are
A. Organic in nature
B. Stronger in compression than in tension
C. Always amorphous in nature
D. Always bad heat conductors
✅ The correct answer is option B.