How did the Little Ice Age affect the Scandinavian settlements in Greenland?
a. The Norse disappeared from Greenland.
b. Icelanders migrated to the gentler climate of Greenland.
c. Vikings were forced to abandon cereal cultivation in Greenland.
d. The Scandinavians adopted the technology of the Inuit to survive in Greenland.
a. The Norse disappeared from Greenland.
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Which of the following is true with regard to scissor lifts?
a. Scissor lifts are insulated to protect against electrical contact. b. Lifts may only be operated from a platform operator's station. c. All scissor lifts operate in the same way. d. Conduct safety checks for loose and missing parts before operating the lift.
Which of the following types of compressors is NOT normally used on liquid chillers?
A) Scroll B) Rotary C) Reciprocating D) Screw
Which of the following areas is NOT an NATE certification specialty?
A) Commercial refrigeration B) Oil furnaces C) Air conditioning D) Transport refrigeration
What is the current automotive/ light-duty truck equivalent of the J1939 data bus used on medium/heavy trucks on passenger cars and light duty trucks?
A. J-1587 B. J-1708 C. CAN-A D. CAN-C