After replacing a gauge, the isolation valve should be ________
A) removed and replaced with a hydraulic valve
B) replaced every time, in case it has undetectable internal damage
C) opened very carefully to prevent damaging the gauge with sudden pressure
D) opened fully to check calibration of the gauge and quickly restore pressure to the line
C
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7 inches = ____ millimeters. Round to the nearest tenth millimeter.
A. 155.7 B. 163.2 C. 170.6 D. 177.8
Draw the influence lines for bar forces in members CD, EL, and ML of the truss shown in Figure P12.34. The load moves along BH of the truss.
A warped aluminum cylinder head can be restored to useful service by ________
A) Heating in an oven at 500°F with shims under each end, allowing it to cool, and then machining it B) Grinding the gasket surface and then align honing the camshaft bore C) Heating it to 500°F for 5 hours and cooling it rapidly before final machining D) Machining the gasket surface to one-half of the warped amount and then heating the head in an oven and allowing it to cool slowly
When is the optimal time for determining a system's balance point?
A) after installing electrical strip heat B) before purchasing a heat pump system C) when outdoor temperatures are moderate D) when you run the system at full capacity