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MCQs

Total Questions : 5013 | Page 500 of 502 pages
Question 4991. ____________________ metal is used as a bearing liner material?
  1.    Pewter
  2.    White
  3.    Babbitt
  4.    Gun
 Discuss Question
Answer: Option C. -> Babbitt
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4992. The ‘laughing gas’ is__________________?
  1.    Nitrous oxide
  2.    Nitric oxide
  3.    Nitrogen trioxide
  4.    Nitrogen pentoxide
 Discuss Question
Answer: Option A. -> Nitrous oxide
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4993. Melting point & boiling points of liquid oxygen are respectively – 218.8°C & – 183°C, while the same for liquid nitrogen is – 210°C & – 195.8°C respectively. The difference in melting points of liquid oxygen & liquid nitrogen is not equal to 8.8 ?
  1.    °C
  2.    °F
  3.    °K
  4.    °R
 Discuss Question
Answer: Option B. -> °F
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4994. Heat transfer by ______________ is almost absent in case of fluidised bed drying operation?
  1.    Radiation
  2.    Conduction
  3.    Convection
  4.    Both B. & C.
 Discuss Question
Answer: Option A. -> Radiation
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4995. Regeneration of molecular sieve requires it to be heated to a temperature of about __________________ °C?
  1.    80-120
  2.    200-300
  3.    600-800
  4.    1000-1100
 Discuss Question
Answer: Option D. -> 1000-1100
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4996. The activity of pure hydrogen gas at 1000°C and 5 atm pressure_________________?
  1.    Is always less than 1
  2.    Is always greater than 1
  3.    Can be 5
  4.    Depends on the choice of the standard state
 Discuss Question
Answer: Option D. -> Depends on the choice of the standard state
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4997. Brazing filler metal used for joining steel plates_________________?
  1.    Melts below the melting points of base metals
  2.    Melts below 300°C
  3.    Is copper phosphorous alloy
  4.    Is copper
 Discuss Question
Answer: Option A. -> Melts below the melting points of base metals
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4998. Ammonia gas can be dried by___________________?
  1.    PCl5
  2.    Quick lime
  3.    CaCl2
  4.    Concentrated H2SO4
 Discuss Question
Answer: Option B. -> Quick lime
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 4999. The minimum temperature to which the water can be cooled in a cooling tower is the ______________ temperature of air?
  1.    Ambient
  2.    Dry bulb
  3.    Dew point
  4.    Wet bulb
 Discuss Question
Answer: Option C. -> Dew point
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!
Question 5000. If the head is doubled in & centrifugal pump, the power required will increase in the ratio of__________________?
  1.    23
  2.    23/2
  3.    25/2
  4.    21/3
 Discuss Question
Answer: Option B. -> 23/2
NO EXPLANATION IS AVAILABLE FOR THIS QUESTION!

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