Question

q7: when comparing the fitting of an r - 12 and r - 134a system, the r - 134a system has
smaller metal fittings
larger metal fittings
smaller plastic fittings
larger plastic fittings

Explanation:

R - 134a has a higher operating pressure than R - 12. To withstand this higher pressure, R - 134a systems typically have larger metal fittings.

Answer:

B. larger metal fittings