Which of the following is a disadvantage of a solenoid actuator when compared with a piezo actuator?
A. mechanical movement is limited
B. are more bulky in size
C. slow response
D. high cost
Answer: C
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Which of the following is the part of the drainage system located outside of the building that conveys storm water or other drainage, but no sewage?
a. building storm sewer b. roof drain c. scupper drain d. foundation drain
This material has 0.3 to 0.6 percent carbon, has some hardness, but remains easy to forge and machine.
a. mild steel b. medium carbon steel c. high carbon steel d. hot-rolled steel
Because concrete is heavy, doing stretching exercises before working with it will help prevent _____.
a. sore arms b. leg cramps c. strains and sprains d. bruises
Technician A says all pressure differential valves must be manually recentered after bleeding. Technician B says a recentering spring is used on some pressure differential valves. Who is correct?
A. A only B. B only C. Both A and B D. Neither A nor B