Which type of lamp are the following: Low-pressure sodium lamp, mercury-vapor lamp, metal-halide lamp, high-pressure sodium lamp?
What will be an ideal response?
These are types of HID (high-intensity discharge) lamps.
Trades & Technology
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Reinforcements that consist of unidirectional fibers are called ____. ?
A. ?lamina B. ?thermoplastic C. ?fibrous D. ?interfacing
Trades & Technology
What is the recommended size of a Type B vent for a water heater with a 199,000 BTU per hour input rating and a vent 20 feet above the heater without any offsets?
What will be an ideal response?
Trades & Technology
Why accidents do happen is a concern for safety and health decision makers.