TSD Training > Quotes

“Voltage is measured in volts. Current is measured in amperes. Resistance is measured in ohms. One volt is the electrical pressure required to cause 1 ampere of current to flow through a resistance of 1 ohm. Scientists have made experiments which show that 6280 trillion electrons pass a given point each second when there is 1 ampere of current in a circuit.”
― TSD Training, Refrigeration and Air Conditioning Volume 1 of 4 - Fundamentals: Includes Principles of Electricity, Fundamentals of Gasoline Engines, Physics of Refrigeration, and Refrigerants

“There was a time when Grandma used a block of ice to keep her food from spoiling. Later, a mechanical unit replaced the block of ice. In those days a service call often meant airing out the kitchen before work could be started because the place was full of ammonia or sulphur dioxide fumes. You do not have that problem today, for the modern domestic refrigerator uses a refrigerant which is practically odourless and harmless.”
― TSD Training, Refrigeration and Air Conditioning Volume 2 of 4 - Commercial Refrigeration: Includes Commercial Refrigeration Systems, Cold Storage, Ice Plants, Special Application, and Vehicle Refrigeration Units