In what year did it become necessary for all HVAC technicians to become certified to handle refrigerant under Section 608 of the Clean Air Act?
A. 1987
B. 1992
C. 1994
D. 1996
Answer: C
Trades & Technology
You might also like to view...
When a specification is general and applies to all or several views, it may be placed within a ruled space called a(n) ____________________ block.
Fill in the blank(s) with the appropriate word(s).
Trades & Technology
El objetivo del revestimiento de la forma es _____.
a. formar el perímetro de la losa b. mantener el espaciado c. reforzar las uniones d. brindar apoyo primario
Trades & Technology
Which roof type is shown at the top right of the accompanying picture?
A. gable B. mansard C. shed D. hip
Trades & Technology
The circuit shown in Figure P15.29 is claimed to exhibit a second-order Butterworth low-pass voltage gain characteristic. Derive the characteristic and verify the claim.
Trades & Technology