Which of the following is a paper space tool that consists of one or more viewports to aid plotting?
A. layout
B. sheet identifier
C. linetype
D. block
Answer: A
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In a column of water, each foot of head exerts a force of _____.
a. 0.138 psig b. 0.375 psig c. 0.433 psig d. 0.897 psig
PROBLEM 3.14 In order to reduce the total mass of the assembly of Prob. 3.13, a new design is being considered in which the diameter of shaft BC will be smaller. Determine the smallest diameter of shaft BC for which the maximum value of the shearing stress in the assembly will not be increased. PROBLEM 3.13 Under normal operating conditions, the electric motor exerts a torque of 2.4 kN ? m on shaft AB. Knowing that each shaft is solid, determine the maximum shearing stress in (a) shaft AB, (b) shaft BC, (c) shaft CD.
Why is it important that the same force be used when tightening nuts and bolts on compressors?
A) Gaskets can seat unevenly and leak. B) It is easier to tighten evenly all the way around. C) You may not always have permagasket to help. D) Most compressor heads have only 2 bolts.
What type of measurements require a true RMS meter to obtain accurate results?
A) Strip heater current B) Shaded-pole motor current C) Nonlinear, electronic switching loads D) Linear alternating current loads