After the proper test pressure has been reached during an annual service test on fire hose, pressure should be maintained for a period of:
A. thirty seconds
B. one to three minutes
C. three to five minutes
D. twenty minutes
Ans: C. three to five minutes
You might also like to view...
The ____________________ line on the bottom of the hoof marks the outer edge of the junction between the sensitive part of the hoof and the horny hoof.
Fill in the blank(s) with the appropriate word(s).
Ultrasonic occupancy sensors are triggered by __
a. heat b. light c. motion d. sound
About how many billions of trees are planted in the U.S. each year?
A) ten B) five C) three D) two
PROBLEM 3.17 The solid shaft shown is formed of a brass for which the allowable shearing stress is 55 MPa. Neglecting the effect of stress concentrations, determine the smallest diameters dAB and dBC for which the allowable shearing stress is not exceeded.
