On a stud wall, the stucco is applied in three coats: scratch coat, brown coat and finish coat. In the scratch coat, the coated surface is scratched with a scratching tool. What is the purpose of scratches, and are the scratch lines horizontal, vertical, diagonal, or some other orientation?
What will be an ideal response?
The scratches provide a (mechanical) key between the scratch coat and the following brown coat. The scratch lines
must be horizontal.
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Duct detectors are installed ____________.
A. As a substitute for area smoke detectors B. Next to fresh air returns C. In all residential locations D. As a means of shutting down airflow when smoke is detected
For insulating a cylindrical vessel 14' in diameter with 3.5" thick block, how many lags per course will be required if the lag’s outer width is 4.5"?
a. 119 b. 121 c. 123 d. 125
?Who should supervise the testing of your weld?
A. ?A friend so they can help you prepare the test specimens because all of that grinding is hard work. B. ?The person who wrote the code. C. ?Your welding teacher or a school administrator. D. ?The same individual or group that witnessed you taking the test.
Buffing the nails with pumice powder is used to treat:
What will be an ideal response?