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MCQs

Total Questions : 5013 | Page 61 of 502 pages
Question 601. When dry bulb temperature & wet bulb temperature of moist air is the same, it means that the
  1.    Partial pressure of water vapour is less than the total pressure
  2.    Humidity is < 100% & dew point temperature of air has not reached
  3.    Dew point temperature of air has not reached & air is not saturated fully
  4.    Air is fully saturated
 Discuss Question
Answer: Option D. -> Air is fully saturated
Question 602. Oxygen content below __________ percent in air contaminated with nitrogen does not support combustion and is unsafe for humane exposure.
  1.    18
  2.    16
  3.    14
  4.    12
 Discuss Question
Answer: Option B. -> 16
Question 603. When dry bulb temperature & wet bulb temperature of moist air is the same, it means that the
  1.    Partial pressure of water vapour is less than the total pressure
  2.    Humidity is < 100% & dew point temperature of air has not reached
  3.    Dew point temperature of air has not reached & air is not saturated fully
  4.    Air is fully saturated
 Discuss Question
Answer: Option D. -> Air is fully saturated
Question 604. Filler metal is used in __________ welding.
  1.    Braze
  2.    Electric spot
  3.    Projection
  4.    Seam
 Discuss Question
Answer: Option A. -> Braze
Question 605. A pycnometer is used for the measurement of
  1.    Flow rate of molten metal
  2.    Specific gravity of a liquid
  3.    Composition of alloys
  4.    Concentration of a solution
 Discuss Question
Answer: Option B. -> Specific gravity of a liquid
Question 606. A colloidal system, in which a liquid is dispersed in gas is called a/an
  1.    Gel
  2.    Aerosol
  3.    Foam
  4.    Emulsion
 Discuss Question
Answer: Option B. -> Aerosol
Question 607. Disposable patterns are made of
  1.    Metal
  2.    Polystyrene
  3.    Rubber
  4.    Wood
 Discuss Question
Answer: Option B. -> Polystyrene
Question 608. The laminar boundary layer thickness in zero pressure gradient flow over a flat plate along the x-direction varies as x0.5 while the thickness of turbulent boundary layer varies as (where, x = distance from the leading edge)
  1.    X1.5
  2.    X0.8
  3.    X-1.5
  4.    X-0.8
 Discuss Question
Answer: Option B. -> X0.8
Question 609. With increase in __________ Knocking tendency in a spark ignition petrol engine decreases.
  1.    Supercharging
  2.    Wall temperature
  3.    Compression ratio
  4.    Engine speed
 Discuss Question
Answer: Option D. -> Engine speed
Question 610. If a solid is compressed adiabatically in its elastic range, its __________ remains constat
  1.    Internal energy
  2.    Enthalpy
  3.    Entropy
  4.    Temperature
 Discuss Question
Answer: Option C. -> Entropy

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