The individual that directly oversees work being performed by a crane and the rigging crew is the _____.
a. lift director
b. crane operator
c. site supervisor
d. crane user
a. lift director
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New products and technology come to the landscape industry from two major sources: researchers at universities and ____________________
Fill in the blank(s) with correct word
Answer the following statement(s) true (T) or false (F)
1. Shunt field power supplies are never left energized when the motor is not in operation. 2. Power to an armature is generally supplied by a four-phase, full-wave bridge rectifier. 3. One method of sensing current is to insert current transformers in the three-phase power lines supplying power to the solid-state controller. 4. When a phase-shift control unit senses a voltage decrease, it increases the voltage supplied to the armature until the electro-tachometer is again producing the present output voltage. 5. Feedback control occurs when an electro-tachometer feeds a signal back to the phase-shift unit.
Geographic information about soils primarily addresses changes in field soil properties in the vertical direction
Indicate whether the statement is true or false
What is the most frequently used type of electric space heater for residential and commercial buildings?
A) Convection baseboard electrical heaters B) Suspended forced air heaters C) Infrared electric heaters D) Cabinet-style electric heaters