RefrigerationCâu 73 / 110
High condenser (head) pressure with normal charge is most often caused by what?
a.Overcharged suction line insulation
b.Poor airflow or a dirty condenser coil
c.A shorted thermostat
d.An oversized return grille
Giải thích
Restricted condenser airflow, from a dirty coil, failing fan, or blocked clearance, prevents adequate heat rejection and raises head pressure. Non-condensables or overcharge can also raise head pressure. Cleaning the coil and confirming fan operation are first steps.
Luyện miễn phí toàn bộ 110 câu hỏi — không cần đăng ký.
Câu hỏi liên quan cùng chủ đề
- A refrigerant metering device such as a fixed orifice or TXV creates what effect on the refrigerant?
- Which category of refrigerants is being phased down under regulations due to high global warming potential?
- A compressor that is trying to compress liquid refrigerant returning from the evaporator can suffer what damage?
- When comparing the two sides of an operating system, the discharge line is normally which relative to the suction line?
- A reciprocating compressor changes the refrigerant state by doing what?
- The saturation temperature corresponding to a measured pressure is found using 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