A.Foam
B.Water
C.Nitrogen
D.Steam
Explanation: The correct answer is Nitrogen.
Submitted by: Academy of Pakistan
Chemical Engineering MCQs: 8,342 practice questions with answer choices and available explanations. Page 189 of 557.
Chemical Engineering MCQs
Showing page 189 of 557 · 8,342 total solved questions available.
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A.2 (ΔT1. ΔT2)/(ΔT1 + ΔT2)
B.√(ΔT1. ΔT2)
C.(ΔT1 – ΔT2)/(ΔT1. ΔT2)
Explanation: The correct answer is 2 (ΔT1. ΔT2)/(ΔT1 + ΔT2).
Submitted by: Academy of Pakistan
A.200 BTU/day
B.200 BTU/minute
C.200 BTU/hr
D.50 kcal/hr
Explanation: The correct answer is 200 BTU/minute.
Submitted by: Academy of Pakistan
A.Pe = Nu.Re
B.Pe = Pr/Re
C.Pe = Re.Pr
Explanation: The correct answer is Pe = Re.Pr.
Submitted by: Academy of Pakistan
A.None of these
B.Castables
C.Cements
D.Mortars
Explanation: The correct answer is Castables.
Submitted by: Academy of Pakistan
A.Control the chain reaction
B.Slow down the secondary neutrons
C.Absorb the secondary neutrons
D.None of these
Explanation: The correct answer is Slow down the secondary neutrons.
Submitted by: Academy of Pakistan
A.Reduced chance of gas porosity
B.Less sand expansion type of casting defect
C.Greater dimensional stability of the casting
D.Uniform flow of molten metal into the mould cavity
Explanation: The correct answer is Greater dimensional stability of the casting.
Submitted by: Academy of Pakistan
A.Adiabatic flame temperature
B.Heat release rate (thus requiring smaller combustion chamber)
C.Calorific value, cleanliness and relatively low distribution cost (due to its low specific gravity)
D.All A., B. and C.
Explanation: The correct answer is All A., B. and C..
Submitted by: Academy of Pakistan
A.Toluene-benzene
B.Water-isobutyl alcohol
C.None of these
D.Acetone-carbon disulphide
Explanation: The correct answer is Acetone-carbon disulphide.
Submitted by: Academy of Pakistan
A.nλ = 2d Sin θ
B.nλ = d Sin θ
C.λ = d Sin 2θ
D.λ = 2d Sin 2θ
Explanation: The correct answer is nλ = 2d Sin θ.
Submitted by: Academy of Pakistan
A.Water
B.Methyl ethyl ketone
C.Carbon dioxide
D.Carbon tetrachloride
Explanation: The correct answer is Carbon dioxide.
Submitted by: Academy of Pakistan
A.Toughness
B.Hardness
C.Resilience
D.Brittleness
Explanation: The correct answer is Hardness.
Submitted by: Academy of Pakistan
A.Either B. or C.
B.Nickel
C.Glass
D.Neoprene
Explanation: The correct answer is Either B. or C..
Submitted by: Academy of Pakistan
A.Δt2
B.Δt3
C.Δt
Explanation: The correct answer is Δt.
Submitted by: Academy of Pakistan
A.Chromium
B.Manganese
C.Arsenic
D.Copper
Explanation: The correct answer is Copper.
Submitted by: Academy of Pakistan