____ representing inclined surfaces are not shown in their true lengths in isometric sketches.
A. Perspective lines
B. Vertical base lines
C. Slant lines
D. Horizontal base lines
Answer: C
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Answer the following statement(s) true (T) or false (F)
1. Regardless of material boundary indicates that a datum feature simulator is adjustable (or movable) from MMB toward LMB until it makes maximum contact with the extremities of the datum feature(s). 2. Per Rule #2, MMB is the default condition referenced by a size datum feature. 3. Datum feature selection and datum feature reference are directly related to how a part functions in its assembly. 4. Where a feature of size is referenced at RMB, three conditions exist. 5. In the case where a surface is the primary datum feature, a diameter is the secondary datum feature at RMB, and a width is the tertiary datum feature at RMB, the datum reference frame consists of a plane and an axis with two planes passing through it.
Which of the following is approved for use in most Class I, Division 1 locations?
a. Rigid metal conduit b. PVC c. Liquid-tight conduit d. EMT
Penicillin is produced by the Penicillium fungus, which is grown in a broth whose sugar content must be carefully controlled. The optimum sugar concentration is 4.9 mg/mL. If the concentration exceeds 6.0 mg/mL, the fungus dies and the process must be shut down for the day.
a. If sugar concentration in batches of broth is normally distributed with mean 4.9 mg/mL and standard deviation 0.6 mg/mL, on what proportion of days will the process shut down? b. The supplier offers to sell broth with a sugar content that is normally distributed with mean 5.2 mg/mL and standard deviation 0.4 mg/mL. Will this broth result in fewer days of production lost? Explain.
All of the following statements about the hand valves in an air conditioning gauge manifold are true, EXCEPT:
A. When both hand valves are closed, both the low- and high-side hose ports are connected only to the low- and high-side gauges. B. If either hand valve is cracked open and the center hose is opened, refrigerant pressure will equalize across the system. C. The gauges show respective system pressures when the manifold hand valves are closed. D. If both manifold hand valves are cracked, the pressures will equalize in the manifold and neither of the gauges will accurately indicate system pressure.