Service & TroubleshootingCâu 86 / 110
When measuring the actual airflow of an installed system, which measurement helps diagnose a restrictive duct system?
a.Refrigerant subcooling
b.Gas manifold pressure
c.Total external static pressure across the air handler
d.Condenser saturation temperature
Giải thích
Measuring total external static pressure and comparing it to the blower's rating reveals whether ductwork, filters, or coils are too restrictive. High static pressure indicates undersized or dirty components limiting airflow. It is a key airflow diagnostic tool.
Luyện miễn phí toàn bộ 110 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- HSPF (or HSPF2) rates the seasonal efficiency of what?
- A furnace that heats briefly then shuts off repeatedly before satisfying the thermostat is exhibiting what?
- A dirty flame sensor on a modern furnace most commonly causes what symptom?
- A capacitor that reads well below its rated microfarad value should be treated how?
- Recommended routine maintenance to preserve airflow and efficiency includes what?
- A technician measuring compressor amp draw far above the rated load amps (RLA) should suspect what?
Cập nhật gần nhất: · quy trình kiểm tra
Đội Ngũ Biên Tập PrepPass · Đối chiếu với California CSLB C-20 Warm-Air HVAC Trade Exam · Quy trình kiểm tra