When adding a control transformer for an air-conditioning system to an existing heating system, the second transformer can be wired in parallel with the original or ____.
A. in series with the original transformer
B. as a separate circuit
C. in parallel with the fan relay
D. in parallel with the compressor contactor
Answer: B
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Calcium and magnesium salts in water are the cause of _____.
a. turbidity b. acidity c. hardness d. odors
Technician A says an accelerometer may be mass-type, roller-type, or solid-state. Technician B says when a photodiode is in the photo conductive mode, it is reverse biased when no light is applied. Who is correct?
A. Technician A only B. Technician B only C. Both Technician A and B D. Neither Technician A nor B
The amount of different sizes of mineral particles in a soil defines the soil ________
A) solution B) texture C) pore space D) structure E) profile
This is the base of the foundation system used to displace the building loads over the soil:
A. footing B. stem wall C. piling D. slab E. retaining wall