What kind of check valve would you find in the air conditioner in a 20-year-old-home?
A) A check valve that uses a steel ball B) A check valve made of plastic
C) A check valve that has a disk and a spring D) A check valve that is inside the metering device
C
You might also like to view...
Often the GMA axial spray metal transfer process is referred to simply as ____________________.
Fill in the blank(s) with the appropriate word(s).
Three forces, 
act on a point as shown. The vector lengths are: a = 2560 lb, b = 2340 lb, and c = 3090 lb. Determine the resultant force in standard position. Round the magnitude to 4 significant digits and the angle to the nearest tenth degree.
Fill in the blank(s) with the appropriate word(s).
Answer the following statement(s) true (T) or false (F)
1.A receptacle outlet controlled by a wall switch is permitted to serve as a lighting outlet in kitchens. 2.The NEC® allows Class 2 control wiring to be supported by the raceway that supplies power to the piece of equipment (like a furnace) that the control wiring is associated with. 3.Sheetrock, a popular building material used to finish off walls and ceilings in residential and commercial construction, is also referred to as wallboard. 4.Conductors used in residential wiring can be copper, aluminum, or copper-clad aluminum. 5.Section 300.20(A) requires conductors carrying alternating current and installed in ferrous (iron) metal boxes to be arranged to avoid heating the surrounding metal by magnetic induction. 6.Receptacles are not required on a wall directly behind a range, counter-mounted cooking unit, or sink unless there is more than 12 inches of space behind one of these items and the wall.
The shape or profile of the thread is referred to as the ____.
A. thread profile B. thread form C. thread preference D. thread structure