How is friction due to air reduced?

Related MCQs

• A scooter weighs 120kg f. Brakes are applied so that wheels stop rolling and start skidding. Find the force of friction if the coefficient of friction is 0.4.
• The coefficient of kinetic friction is less than the coefficient of static friction.
• In a chilled water system, the refrigerant is used to cool the air directly while in the direct expansion system, a secondary medium like water is used to cool the air.
• In which component of the chilled water system, the return air and the fresh air mixture is filtered?
• When humidity ratio of air ____ air is said to be dehumidified.
• Which of the following kinetic friction is smaller?
• A mass of 4kg rests on a horizontal plane. The plane is gradually inclined until at an angle θ= 15° with the horizontal, the mass just begins to slide. What is the coefficient of static friction between the block and the surface?
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• What is the function Air heater in the boiler?
• Which among the following fuels need excess amount of air for complete combustion?