Water boils when its vapor pressure
Options:
A.Equals that of the surroundings
B.Equals 760 mm of mercury
C.Equals to atmospheric pressure
D.Equals the pressure of water in the container
Answer: Option A

Previous Next

Submit Solution

Your email address will not be published. Required fields are marked *

More Questions on This Topic :

Question 1. Cut-off governing as compared to throttle governing is
  1.    Less efficient and less economical
  2.    Less efficient and more economical
  3.    More efficient and less economical
  4.    More efficient and more economical
Answer: Option D
Question 2. A boiler in India should conform to safety regulations of
  1.    DIN
  2.    BS
  3.    ASTM
  4.    IBR
Answer: Option D
Question 3. The ratio of the energy required to produce the artificial draught (expressed in meters head or J/kg of flue gas) to the mechanical equivalent of extra heat carried away per kg of flue gases due to natural draught, is known as
  1.    Efficiency of the boiler
  2.    Efficiency of the chimney
  3.    Efficiency of the fan
  4.    Power of the boiler
Answer: Option B
Question 4. The missing quantity per stroke is equal to
  1.    Cylinder feed indicated mass of steam
  2.    Cylinder feed + indicated mass of steam
  3.    Mass of cushion steam + indicated mass of steam
  4.    Mass of cushion steam + cylinder feed
Answer: Option A
Question 5. In impulse turbines, when friction is neglected, the relative velocity of steam at outlet tip of the blade is _________ the relative velocity of steam at inlet tip of the blade.
  1.    Equal to
  2.    Less than
  3.    Greater than
  4.    None of these
Answer: Option A
Question 6. A steam turbine, in which a part of the steam after partial expansion, is used for process heating and the remaining steam is further expanded for power generation, is known as
  1.    Back pressure turbine
  2.    Pass out turbine
  3.    Low pressure turbine
  4.    Impulse turbine
Answer: Option B