PROBLEM 3.77 The two solid shafts and gears shown are used to transmit 16 hp from the motor at A, operating at a speed of 1260 rpm, to a machine tool at D. Knowing that the maximum allowable shearing stress is 8 ksi, determine the required diameter (a) of shaft AB, (b) of shaft CD.
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Given the supply curve in the graph below, producer surplus at a price of $5 would be ________.
Fill in the blank(s) with the appropriate word(s).
In order to remember important project dates, it is desirable to:
A. tabulate and flag project milestones at the beginning of the job. B. have a subordinate remind you as the date approaches. C. rely solely upon your memory as the project progresses. D. wait for the contractor to discover (or forget) important project dates, as it is the contractor's responsibility anyway.
If a 0.1 ?F capacitor and a 2.2 k? resistor are connected in series across 30 VDC, how much voltage will the capacitor drop after charging for just one time constant?
A) 19.0 V B) 29.4 V C) 25.9 V D) 28.5 V
Why are all HVACR tradesmen advised to enroll in an approved first-aid course?
A) It is required by law for all tradesmen that belong to a union. B) It is required by ANSI. C) It is required by OSHA. D) Quick and proper treatment of injuries can result in less pain and possibly save lives.