When a weld symbol is placed on the reference line on the lower side of the line, the weld must be made on the ____ side of the joint.
A. top
B. right
C. left
D. arrow
Answer: D
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American cities increasingly abandoned wooden construction for brick and steel in their downtown districts after
A. the great Chicago fire of 1871. B. the development of the electric elevator and the skyscraper. C. brickmaking became cheaper and iron was superseded by more durable steel for construction purposes. D. the cost of brick and steel dropped markedly in the 1870s. E. wooden tenements collapsed in the New York inner city in the 1880s.
Vertical edge members of a sash are called ____.
a.rails b.stiles c.lights d.muntins
If the R22 evaporator temperature is 25°, what is its suction pressure supposed to be?
68 psig b. 49 psig c. 35 psig d. 15 psig
In leak detection, R-22 is used in conjunction with which of the following?
A) With visual inspection B) With soap bubbles C) With ultrasound D) With electronic detection