A british thermal unit is - Study guides, Class notes & Summaries

______-phase AC Voltage is a combination of three alternating voltage waveforms, each displaced by 120 electrical degrees (1/3 Cycle) apart. (21-457) - Three ______-phase AC Voltage only contains one alternating voltage waveform. (21-457) - One A ____ ________ fuse can be reset after an overload and reused. (20-440) - Circuit Breaker A British Thermal Unit is the amount of heat needed to do what? (21-461) - Raise 1 pound of water 1 Fahrenheit A calorie is the amount of heat needed to do wh...

Heat which can cause a change in temperature of a substance is called; : Sensible Heat Heat added to a substance without a rise in temperature;(example: liquid refrigerant to gas) this process is called? : Latent Heat of Vaporization Heat added to the refrigerant in a vapor state after the evaporation process is called; : Superheat A scroll compressor move refrigerant by means of; : Involute spirals The movement of heat by way of fluid(of air) is called; 2 : Convection The movement ...

HVAC EXCELLENCE QUESTIONS AND ANSWERS ALREADY GRADED A Heat which causes a change in temperature of a substance is called sensible heat, Heat added to a substance without a rise in temperature; (example: liquid refrigerant to gas) this process la called? latent heat Heat added to the refrigerant in vapor state after the evaporation process is called, superheat A scroll compressor moves refrigerant by means of; involute spirals The movement of heat by way of fluid or is called; a...

Heat which causes a change in temperature of a substance is called; : Sensible Heat. heat added to substance without a rise in temperature; (example: liquid refrigerant to gas) this process is called? : Latent heat of vaporization. Heat added to the refrigerant in a vapor state after the evaporation process is called; : Superheat. A scroll compressor move refrigerant by means of; : Involute Spirals. The movement of heat by way of fluid (or air) is called; : Convection. The movement o...

Heat which causes a change in temperature of a substance is called; - ANSWER sensible heat. Heat which causes a change in state of a material without a change in temperature is called; - ANSWER latent heat. Heat which is added to a vapor after the change of state occurs is called; - ANSWER superheat. Heat can travel by; - ANSWER conduction, convection, radiation. The movement of heat by way of fluid (or air) is called; - ANSWER convection . The movement of heat by direct contact i...

Specific Heat is - ANSWER-the amount of heat neccessary to raise the temperature of a substance one deg F What are two types of heat - ANSWER-sensible and latent Heat flow by conduction is - ANSWER-energy travelling from one molecule to another Radiation can be defined as - ANSWER-transfer of heat through the air without heating the air and is absorbed by a solid object Water freezes at - ANSWER-32 deg f Refrigeration is - ANSWER-the tranfer of heat from a place where it is not wa...

Heat which causes a change in temperature of a substance is called; - ANSWER sensible heat. Heat which causes a change in state of a material without a change in temperature is called; - ANSWER latent heat. Heat which is added to a vapor after the change of state occurs is called; - ANSWER superheat. Heat can travel by; - ANSWER conduction, convection, radiation. The movement of heat by way of fluid (or air) is called; - ANSWER convection . The movement of heat by direct contact is called;...

Conservation of Energy Principle Correct Answer-During an interaction, energy can change from one form to another but the total amount of energy remains constant. i.e. Energy cannot be created or destroyed. First Law of Thermodynamics Correct Answer-The first law of thermodynamics is a version of the law of conservation of energy, adapted for thermodynamic systems. The law of conservation of energy states that the total energy of an isolated system is constant; energy can be transformed from ...

Heat which causes a change in temperature of a substance is called; : sensible heat. Heat which causes a change in state of a material without a change in temperature is called; : latent heat. Heat which is added to a vapor after the change of state occurs is called; : superheat. Heat can travel by; : conduction, convection, radiation. The movement of heat by way of fluid (or air) is called; 2 : convection . The movement of heat by direct contact is called; : conduction . The standa...

HVAC FINAL Correct Questions & Answers(RateA_____is the quantity of heat required to raise the temperature of I lb of water |°F. - ANSWER British thermal unit (BTU) Comfor is typically attained at normal cooling and heating temperatures with a relative humidity of about _____% - ANSWER 50% _________is the movement of air through distribution systems and building spaces. - ANSWER Air circulation ___________is the variation of air temperature in a building space that occurs when warm air...