To remove _____ stains, mix together 1 part ammonium chloride or sal ammoniac and 4 parts powdered talc.
A. welding splatters
B. dirt and paper
C. copper and bronze
D. egg splatter
Answer: C
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Answer the following statement(s) true (T) or false (F)
1. The Underwriters Laboratories Inc. (UL) performs product safety tests and certifications for laboratory use only. 2. The EPA sets the standards for contaminant levels in our drinking water that are considered safe to drink. 3. The MCL is legally enforceable. 4. The MCLG is legally enforceable. 5. The source of outdoor air pollution (Figure 3.12) may be classified into three broad categories: the stationary sources, the mobile sources, and the natural sources.
Induced-draft, forced-draft, counterflow, and crossflow cooling towers are all examples of
A) an atmospheric-draft cooling tower. B) a mechanical-draft cooling tower. C) a natural-flow cooling tower. D) a hyperbolic cooling tower.
The best PLC language for a program that has a large number of numerical calculations in addition to the control requirements is
A) Sequential Function Charts. B) Function Block Diagrams. C) Ladder Logic. D) Instruction List. E) Structured Text.
Express 3600 inches as yards.
A. 50 B. 75 C. 88 D. 100