The Data Highway Plus (DH+) is a bus configuration that ________
A) Supports up to 64 devices B) Uses a master/slave communication technique
C) Contains advanced interface converters D) Is a token-passing network
D
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An AC drive has three basic sections: the converter, the DC filter, and the output.
Answer the following statement true (T) or false (F)
The plan view is like viewing the land from an airplane
Indicate whether the statement is true or false
Technician A says that whenever a floor jack is used to raise a vehicle off the ground safety stands should be used to support the vehicle. Technician B says that the floor jack can support the vehicle safely as long as it is just for a short time. Who is right??
A) A only B) B only C) Both A and B D) Neither A nor B
During the initial startup of a geothermal water source heat pump, when should the water flow be checked and adjusted?
A) after checking the system refrigerant pressures and amp draw B) after operating the unit for at least 15 minutes C) first, before operating the system D) after making sure the refrigerant charge and airflow are correct