Which of the following statements is correct concerning the testing of an R-22 refrigeration system for leaks in an enclosed compartment with a halide torch?

Correct Answer: Option D — Halide torches are useful in locating very small R-22 leaks.

Halide torches react chemically with halogenated refrigerants like R-22 contacting a hot copper reaction plate, changing the flame color to green or purple. This high sensitivity makes them exceptional tools for detecting even micro-leaks in machinery spaces.