Test
26408-14 HVAC Controls - Quiz
Preguntas del test (5)
1If lighting units and other appliances are also supplied, the rating of cord- and plug-connected room air
conditioners must not exceed what percentage of the branch circuit rating?- A50%
- B70%
- C80%
- D90%
2Which of the following principles states that heat is created in one place and carried to another by means of air
or water?- AHeat-transplant principle
- BHeat-movement principle
- CHeat-creation principle
- DHeat-transfer principle
3When the bimetal coil in a cooling-only thermostat heats up and unwinds, the mercury switch _____.
- Aopens its contacts and initiates defrost
- Bopens its contacts and stops the cooling system compressor
- Ccloses its contacts and shuts down the system
- Dcloses its contacts and starts the cooling system compressor
4In a cooling system, the heat absorbed by the refrigerant is transferred to the cooler outdoor air in a heat
exchanger known as a(n) _____.- Aexpansion device
- Bcompressor
- Ccondenser
- Devaporator
5Multi-stage thermostats provide energy savings by cycling on stages of heating or cooling based on _____.
- Ademand
- Bpump size
- Cpreset timers
- Dtime delay relays
Información
- Descripción
- General Electrician Test sobre 26408-14 HVAC Controls - Quiz, creado por hcannaday el 07/06/2016.
- Autor
- hcannaday
- Idioma
- English
- Visitas
- 60
- Etiquetas
- Valoración
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