Question

Aluminum heat sink is also called ___________

(a) Folded-Fin heat sink

(b) Bonded-Fin heat sink

(c) Sleeve bearing type heat sink

(d) Extrusion heat sink

I got this question in a job interview.

I'd like to ask this question from Heat Sink for Power Transistor-1 in section Power Amplifier of Analog Circuits

Answer 1

The correct choice is (d) Extrusion heat sink

To explain I would say: Aluminum heat sinks are also called as extruded heat sinks as they can be made using extrusion. Aluminum is the most common heat sink material, light in weight and costs less than Cu and other materials, and has relatively good thermal conductivity.