Stoichiometry

101. Cp equals Cv at

  1. 0°C
  2. 0°K
  3. 0°F
  4. 0°R

Correct answer: (B)
0°K

102. Cp is expressed in S.I. unit as

  1. J/kg.°K
  2. 0°K
  3. W/m2.°C
  4. W/m.°K

Correct answer: (A)
J/kg.°K

103. Cp/Cv for monatomic gases is

  1. 1.44
  2. 1.66
  3. 1.99
  4. 1

Correct answer: (B)
1.66

104. Cv for monatomic gases is equal to(where, R = gas constant)

  1. R
  2. 1.5 R
  3. 2R
  4. 3R

Correct answer: (B)
1.5 R

105. CaCO3 contains _________ percent of Ca by weight.

  1. 40
  2. 48
  3. 96
  4. 12

Correct answer: (A)
40

106. Capacity of a refractory brick to withstand-sudden changes in temperature is denoted by the property called

  1. Spalling resistance
  2. Refractoriness
  3. Refractoriness under load (RUL)
  4. None of these

Correct answer: (A)
Spalling resistance

107. Carborundum used for making crucibles for melting non-ferrous metals is chemically

  1. Silicon carbide
  2. Silicon nitride
  3. Crystalline magnesia
  4. Zirconium sulphate

Correct answer: (A)
Silicon carbide

108. Ceramic recuperators used for waste heat recovery from high temperature flue gas going out of the furnace is made of

  1. Fireclay
  2. Silicon carbide
  3. Corundum
  4. Siliceous fireclay

Correct answer: (B)
Silicon carbide

109. Chemically, mullite refractories is

  1. 3Al2O3.2SiO2
  2. Al2O3
  3. ZrSO4
  4. ThO2

Correct answer: (A)
3Al2O3.2SiO2

110. Clausius Clapeyron equation applies to the _________ process.

  1. Sublimation
  2. Melting
  3. Vaporisation
  4. All (A), (B) & (C)

Correct answer: (D)
All (A), (B) & (C)

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