Needle valves are used for fine flow control because _____.
a. the shape provides a gradual increase or decrease in the size of the valve opening
b. they are very inexpensive
c. they are made of stainless steel
d. they exhibit high head loss
a. the shape provides a gradual increase or decrease in the size of the valve opening
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The voltage applied across a 1000?H inductor is vL(t)=4 sin(?ot) mV, with ?o= 103 rad/s. The current flowing through the inductor iL(t) has amplitude equal to ___ mA.
Fill in the blank(s) with the appropriate word(s).
A ball bearing that is on a shaft or in a housing should be removed:
A) By applying pressure only to the race that is supported securely B) Only by pressing on the inner race when the outer race is in a housing or by pushing on the outer race when the inner race is on a shaft C) By pressing on and supporting any part of the bearing that is available D) B and C above
What system operating characteristics would you expect from a system that has a restricted orifice type-metering device?
What will be an ideal response?
Circles and arcs are always created parallel to the XY plane of the current UCS
Indicate whether the statement is true or false