What is the difference between pressure relief valves, rupture disks, and fusible plugs?
What will be an ideal response?
Safety relief valves may be set to relieve back to the low side of the system or through escape piping safely to atmosphere. They will re-seat when the pressure returns to a safe level. Rupture disks are one-time failure devices
that release the refrigerant upon excessive pressure. Fusible plugs melt at a set temperature and will release the refrigerant as a one-time failure device.
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PROBLEM 2.9
A 9-kN tensile load will be applied to a 50-m length of steel wire with E = 200 GPa. Determine the smallest diameter wire that can be used, knowing that the normal stress must not exceed 150 MPa and that the increase in length of the wire must not exceed 25 mm.
What is the weld face contour required as specified in the welding symbol shown in Figure 1?
a. Concave
b. Convex
c. Flush
d. None of the above
_____________________ indicates the difference in a trait from parent to offspring.
Fill in the blank(s) with the appropriate word(s).
After completing a TMC wheel end adjustment which of the following confirms that the adjustment is as specified?
A. preload drag of 5-inch pounds (0.56 N.m) measured with fishscale B. preload drag of 5-foot pounds (7 N.m) measured with torque wrench C. endplay of 0.001-inch to 0.005-inch (0.025 to 0.127 mm) measured with a dial indicator D. endplay within 0.010-inch (0.254 mm) measured with a dial indicator