Group G is the catchall group whose atmospheres contain combustible dusts not included in Group E or F, including ____.
A. flour, grain, wood, plastic, and chemicals
B. metal and polymer
C. paper and paint
D. chemicals, metal and rubber products
Answer: A
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In a circuit with an applied voltage of 120 V and a total resistance of 60 ohms, how much current flows through each resistor?
a. 1 A b. 2 A c. 3 A d. 4 A
What do modern hydronic systems use to circulate the hot water?
A) Pumps B) Fans C) Gravity D) Convection
Two concentric cylinders of different diameters that have their bases in the same plane and have the same height are combined using an INTERSECT operation. What will the resulting object be?
a. A pipe b. The smaller cylinder c. The bigger cylinder d. No object
Annual Fuel Utilization Efficiency, AFUE, is:
A) Calculated by comparing a customer's gas bill to the calculated heat loss of their house. B) The efficiency of the furnace for an entire heating season. C) The cost of operating the furnace for an entire heating season. D) Calculated by operating the furnace for one hour at the manufacturer's design condition.