Final answer:
Capillary tubes and orifices are the two types of fixed metering devices used in engineering.
Step-by-step explanation:
The two types of fixed metering devices in engineering are capillary tubes and orifices.
A capillary tube is a long, narrow tube used to control the flow rate of a fluid by means of its length and diameter. It works based on the principle of capillary action.
An orifice is a small opening or hole that restricts the flow of a fluid. It can be used to measure the flow rate or control the pressure of the fluid.
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