The density of hydrogen is _____ times the density of air.

Related MCQs

• Hydrogen has a heat transfer co-efficient _____ times that of air
• The thermal conductivity of hydrogen is ______ times that of air
• For large power transformers, self oil cooled type or air blast type which of the following values of current density may be used ?
• Which ofthe following is an advantage of hydrogen cooling ?
• With conventional hydrogen cooling it is possible to increase the rating of a single unit to
• In direct cooled system using hydrogen both stator and rotor conductors are made
• The noise produced by a ______ cooled machine is less as the rotor moves in a medium of smaller density.
• For 275 kV transformers, using cold rolled grain oriented steel, which of the following values of flux density may be used?
• A current density of _____ is ilsed for large power transformers with forced circulation of oil or with water cooling coils
• Which of the following brushes can be used for high values of current density ?