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MCQs

Total Questions : 99 | Page 10 of 10 pages
Question 91. . Which of the following is correct?
  1.    The viscosity of liquids and gases decrease with increasing temperature
  2.    The viscosity of liquids and gases increase with increasing temperature
  3.    the viscosity of gases increases with increasing temperature, but decreases in liquids
  4.    the viscosity of gases decreases with increasing temperature, but decreases in liquids.
 Discuss Question
Answer: Option C. -> the viscosity of gases increases with increasing temperature, but decreases in liquids
Question 92. . The Komologorov eddy size
  1.    is constant at all stirrer speeds
  2.    increases with stirrer speed
  3.    decreases with stirrer speed
  4.    becomes zero when the stirrer speed is very low
 Discuss Question
Answer: Option C. -> decreases with stirrer speed
Question 93. . Reynolds number for turbulent flow over a plate should be more than
  1.    5 x 10-5
  2.    106
  3.    5 x 105
  4.    500
 Discuss Question
Answer: Option B. -> 106
Question 94. . Pluronic F68 protects mammalian cells from damage stems as it is a/an
  1.    surface active agent which stabilizes foams
  2.    surface active agent which destabilizes foams
  3.    excellent source of vitamins
  4.    coagulant
 Discuss Question
Answer: Option A. -> surface active agent which stabilizes foams
Question 95. . A Brookfield viscometer cannot determine the shear stress because
  1.    A. the shear stress is not defined
  2.    a computer is required
  3.    the impeller type is given only by numbers
  4.    all of the above
 Discuss Question
Answer: Option A. -> A. the shear stress is not defined
Question 96. . Reynolds number for turbulent flow over a plate should be more than
  1.    5 x 10-5
  2.    106
  3.    5 x 105
  4.    500
 Discuss Question
Answer: Option B. -> 106
Question 97. . The Komologorov eddy size
  1.    is constant at all stirrer speeds
  2.    increases with stirrer speed
  3.    decreases with stirrer speed
  4.    becomes zero when the stirrer speed is very low
 Discuss Question
Answer: Option C. -> decreases with stirrer speed
Question 98. . Which of the following is correct?
  1.    The viscosity of liquids and gases decrease with increasing temperature
  2.    The viscosity of liquids and gases increase with increasing temperature
  3.    the viscosity of gases increases with increasing temperature, but decreases in liquids
  4.    the viscosity of gases decreases with increasing temperature, but decreases in liquids.
 Discuss Question
Answer: Option C. -> the viscosity of gases increases with increasing temperature, but decreases in liquids
Question 99. . Pluronic F68 protects mammalian cells from damage stems as it is a/an
  1.    surface active agent which stabilizes foams
  2.    surface active agent which destabilizes foams
  3.    excellent source of vitamins
  4.    coagulant
 Discuss Question
Answer: Option A. -> surface active agent which stabilizes foams

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