Rotating machines normally produce a waveform called a _____ wave.
A. cosine
B. linear
C. sine
D. pulsating
Answer: C
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A masking solution of _____ can be used to darken lighter color brick.
A. oxalic acid crystals and water B. hydrochloric acid C. hydrogen peroxide D. paraffin oil and Varosol
Answer the following statement(s) true (T) or false (F)
1. Matter can be described as any substance that occupies space and has weight. 2. Four-stroke engines are much simpler in design than two-stroke engines. 3. The purpose of the two-stroke crankcase is the same as that of the four-stroke crankcase—to house and support the major engine components. 4. With a cylinder reed valve engine, the intake port is always closed. 5. The rotary valve engine design is seldom used in today’s power equipment engines because of its size.
Why are open-drive compressors often started up for a short time in the off season?
What will be an ideal response?
Why is it easier to cool a greenhouse without plants in it than a greenhouse with plants?
What will be an ideal response?