NATE Core Exam With Complete Solution Graded A+

Class A - Ordinary Extinguisher Class B - Liquid Extinguisher Class C - Electrical Extinguisher Asphyxiation causes what? - Nausea, Dizziness, Heart Irregularities, and Unconciousness Ladder must be at what dimensions in relation to a house? - 4 ft for every 1 ft, 3 ft above the top of the roof. What different amounts does Copper Tubing come in? - 25, 50, 100 Soft drawn copper tubing means what? - Copper tubing that is on a roll Hard drawn copper tubing means what? - Copper tubing that is bought long (a stick) Type K Copper Tubing - Green and thick Type L Copper Tubing - Blue and medium Type M Copper Tubing - Red and thin How is copper tubing measured in ACR? - 1/2 in OD (Outside Dimensions) Armaflex - Adhesive used with copper tubing Annealed - Softened by heat treatmentFlux - Compound that minimizes oxidation, does NOT clean copper. Nitrogen Tank needs what? - Regulator (controls tank pressure) Human Comfort is achieved by what factors? - Temperature, Humidity, and Air Quality Do refrigerants expire? - No What are the two types of humidifiers? - Fan powered type and Bypass type Bypass Type Humidifier - Open in heating/closed in cooling Specific Heat - BTU/Ib/F Specific Heat of water - 1 Specific Heat of ice - 0.5 Infiltration - Outside air seeping inside Ex-filtration - Air leaking out Heat - a form of energy What are the 3 types of heat energy? - Mechanical, Chemical, Electrical