A.Pyrex
B.Flint
C.Jena
D.Crookes
Explanation: The correct answer is Flint.
Submitted by: Academy of Pakistan
Chemical Engineering MCQs: 8,342 practice questions with answer choices and available explanations. Page 33 of 557.
Chemical Engineering MCQs
Showing page 33 of 557 · 8,342 total solved questions available.
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A.2000
B.200
C.1000
D.100
Explanation: The correct answer is 200.
Submitted by: Academy of Pakistan
A.< 10
B.> 30
C.75
D.50
Explanation: The correct answer is < 10.
Submitted by: Academy of Pakistan
A.Use of excessive positive draft in the furnace
B.Use of non-preheated combustion air
C.Imperfect mixing of fuel & air and infiltration of air
D.Use of pulverised solid fuels
Explanation: The correct answer is Imperfect mixing of fuel & air and infiltration of air.
Submitted by: Academy of Pakistan
A.The disintegration rate of a radioactive substance cannot be increased by heating it
B.Deuterium atom has one proton and two neutrons in its nucleus
C.Electrons have negligible mass and unit negative change
D.Cadmium is capable of absorbing neutrons
Explanation: The correct answer is Deuterium atom has one proton and two neutrons in its nucleus.
Submitted by: Academy of Pakistan
A.Wrought iron
B.Tin
C.Copper
D.Stainless steel
Explanation: The correct answer is Tin.
Submitted by: Academy of Pakistan
A.Maharashtra and Gujarat
B.Gujarat and Madhya Pradesh
C.Maharashtra and Orissa
D.Jharkhand and Chhattisgarh
Explanation: The correct answer is Maharashtra and Gujarat.
Submitted by: Academy of Pakistan
A.α-particle emission from a radioactive element makes it electrically negative
B.The disintegration constant of a radioactive isotope is independent of pressure, temperature or concentration
C.A radioactive element having a half life period of 20 years will completely disintegrated in 40 years
D.β-particle emission from a radioactive element makes it electrically positive
Explanation: The correct answer is A radioactive element having a half life period of 20 years will completely disintegrated in 40 years.
Submitted by: Academy of Pakistan
A.Both enthalpy and material balances
B.The assumption of constant molal-overflow
C.Enthalpy balance only
D.Material balance only
Explanation: The correct answer is Both enthalpy and material balances.
Submitted by: Academy of Pakistan
A.Wetted wall column
B.Bubble-cap plate column
C.Sieve-plate column
D.Packed tower
Explanation: The correct answer is Packed tower.
Submitted by: Academy of Pakistan
A.High silicon cast iron
B.Glass lined steel
C.Porcelain
D.Glass
Explanation: The correct answer is Glass lined steel.
Submitted by: Academy of Pakistan
A.Soften its surface
B.None of these
C.Improve its reliability
D.Harden its surface
Explanation: The correct answer is Harden its surface.
Submitted by: Academy of Pakistan
A.Asbestos
B.Fibre glass
C.Teflon
D.Ceramic fibre
Explanation: The correct answer is Ceramic fibre.
Submitted by: Academy of Pakistan
A.1000°C and 10 atm
B.500°C and 50 atm
C.1000°C and 500 atm
D.200°C and 5 atm
Explanation: The correct answer is 1000°C and 10 atm.
Submitted by: Academy of Pakistan
A.Remains constant
B.Monotonically decreases
C.Increases and then decreases
D.Decreases and then increases
Explanation: The correct answer is Monotonically decreases.
Submitted by: Academy of Pakistan