Which of the following is needed for a noncontact tachometer to read the speed of a blower or pulley?

a. A calculator for the relevant equation
b. Near darkness
c. A reflective spot or piece of tape
d. An infrared receiver


c. A reflective spot or piece of tape

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To prevent the line from sagging or being blown out of alignment by the wind, it may be necessary to set a trig brick.

Answer the following statement true (T) or false (F)

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A microturbine provides some of the electric power for CH2 . Waste heat from the microturbine ___________

A. is used in the absorption chiller B. heats sewage to distill it C. heats domestic water D. Both A and C

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Fire brigades consist of employees who have been trained to respond in the event of a fire

Indicate whether the statement is true or false

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Draw Direct-Form-II system diagrams of the systems with these transfer functions.

What will be an ideal response?

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