How many flip-flops are required to make a counter which counts from 0 to 7?
A) 2 B) 3 C) 4 D) 5
B
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With direct-acting solenoid valves, the port size of the valve is limited by _____.
a. the power limitations of the coil b. the refrigerant type c. the operating pressure d. the ambient temperature
Technician A says that burning of fossil fuels has increased the greenhouse gas CO2 in the atmosphere. Technician B says that increased lumber operations have removed trees, increasing the levels of CO2 in the atmosphere. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
When a technician uses a manifold gauge set to evacuate an air conditioning system what position should the technician position the hand valves in order to evacuate both sides of the system?
A. High pressure hand valve open and low press hand valve closed B. High pressure hand valve closed and low pressure hand valve open C. High pressure hand valve open and low pressure hand valve open D. High pressure hand valve closed and low pressure hand valve closed
When looking at an object in person, we normally see it as ____.
A. having width and height B. having depth and width C. two-dimensional D. three-dimensional