The normal oxygen and carbon dioxide percentages in the flue gas of a properly operating gas furnace are approximately
A) 12% B) 7.5% C) 21% D) 10%
B
You might also like to view...
In an engineering drawing, the absence of a second arrow on the cutting plane line is an indication that the cutting plane line is for a(n) _________________________.
Fill in the blank(s) with the appropriate word(s).
Health care facilities that do not require a Type 1 or Type 2 EES may use batteries for emergency power provided that they maintain 87-1/2 percent of their voltage under full load for a period of _____.
a. 30 minutes b. 60 minutes c. 90 minutes d. 120 minutes
Answer the following statement(s) true (T) or false (F)
1. All bathtubs shall have at least 1 1/2 inch waste and overflow. 2. Local health departments commonly have different or more restrictive requirements than national plumbing codes. 3. Water closet compartments shall be no fewer than 60 inches wide and 30 inches in length. 4. All sinks have a minimum drain size requirement of 1 1/2 inches and require a strainer or cross piece to catch or retain waste products. 5. Water temperature concerns regarding bidets have recently been addressed by codes mandating an ASSE 1070 device set to a maximum temperature of 135ºF.
What is the minimum dc working voltage rating for a capacitor that must drop 120 VRMS?
A) 170 V B) 339 V C) 84.8 V D) 120 V