Question

Finding leaks with a UV light is easier in the ____________.

a) engine compartment
b) dark
c) direction of refrigerant flow
d) front of the vehicle

Answer 1

Finding leaks with a UV light is easier in the dark, as it enhances the visibility of UV-sensitive dye used in detecting leaks in systems such as an automotive AC system.

Step-by-step explanation:

Finding leaks with a UV (ultraviolet) light is easier in the dark. In a dark environment the visibility of the UV-sensitive dye used in the leak detection process is enhanced.

This dye is typically added to the system (like an air conditioning system) and circulates with the refrigerant. When there is a leak, the dye escapes with the refrigerant and can be seen glowing under a UV light. This process is particularly useful when working in enclosed spaces such as an engine compartment, but can be applied anywhere in a vehicle's AC system where leaks are suspected.