Load & DesignPregunta 14 de 110
If a home has a calculated cooling load of 30,000 BTU/hr, what nominal equipment size is the closest match?
a.2 tons
b.2.5 tons
c.3.5 tons
d.4 tons
Explicación
30,000 BTU/hr divided by 12,000 BTU/hr per ton equals 2.5 tons. Manual S guides selecting a unit whose capacity at design conditions closely matches this load. Choosing 2.5 tons avoids the humidity and cycling problems of oversizing.
Practica las 110 preguntas gratis — sin registro.
Preguntas relacionadas de este tema
- In California, plans for new HVAC systems typically must demonstrate compliance with which energy standard?
- Under the California Mechanical Code, when is a permit generally required for HVAC work?
- What is the primary purpose of a Manual J block load versus a room-by-room load?
- Friction rate in duct design is typically expressed in which units?
- Air velocity in a duct is calculated by dividing airflow (CFM) by what?
- A branch duct must deliver 200 CFM at a velocity of about 600 feet per minute. Approximately what free area is required?
Última revisión: · proceso editorial
Equipo Editorial de PrepPass · Verificado con California CSLB C-20 Warm-Air HVAC Trade Exam · Cómo revisamos