NATE CORE QUESTIONS WITH 100% CORRECT ANSWERS GRADED TO PASS

In HVACR terms, what is a feature? - A special characteristic of a product. In HVACR terms, what is a benefit? - The value the customer receives from using the feature What type of temperature is often used by customers when discussing human comfort? - Dry bulb What is an honest person? - A person who is free from fraud or deception, credible, and is marked with integrity. An honest person is fair in their dealings with other people. What is the unit of electrical pressure? - Volt How is line voltage represented on a ladder diagram? - The vertical lines on the sides of the ladder. What are humidifiers in heating systems used for? - To raise relative humidity and increase human comfort. What are some factors contribute to comfort in a home or building? - Temperature, humidity, ventilation, cleanliness of the air. True or false? Care should be taken before sawing a basement wall that was part of the original construction of the home because those walls are typically load bearing. - True What can happen if high concentrations of refrigerant vapor are inhaled? - Nausea, dizziness, heart irregularities, and unconsciousness. When should the damper on a bypass humidifier be open? - Winter What should you use to cut capillary tubing? - A triangular or knife-edge file. How would you connect a voltmeter to a circuit for taking voltage readings? - Connect the voltmeter in parallel with the circuit being tested. True or false? Since electric motors can have two, four, or more poles, the fewer the number of poles, the faster the motor turns? - True True or false? In a tapped multi-speed motor driving a supply blower, changing the connected tap changes the CFM even under no blower load. - True What is an example of a wet bulb thermometer? - A conventional thermometer with a moistened cloth wick covering its sensor. How is electrical current measured? - Amperes According to health and safety regulations, how should the worker climb up or down a ladder? - Always face the ladder. What steps should a technician take to be certain the electrical meter can be used? - 1. Insert red test lead into red common jack. 2. Insert black test lead into black MV jack. 3. Connect test probes across the circuit to be measured. 4. Read millivolt on the 0-50 scale. According to Ohm's Law, when the voltage to an electric heating element is increased by 10%, what does the current through the element increase by? - 10% (Current in a circuit is directly proportional to the applied voltage, and inversely proportional to the circuit resistance) What type of process is combustion? - Chemical True or false? Hacksaws should never be used to cut copper tubing because saw chips can remain inside the tubing. - True