The unit which is essentially a right-hand helical gear and a left-hand helical gear put
together is called a:
A. Herringbone gear. B. Mitre gear.
C. Helical screw.
D. Double helix.
A
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It is acceptable to vent a gas appliance through a masonry chimney as long as _____.
a. a tile or metal liner of the correct size is inserted b. the chimney is inspected to ensure it is in good condition c. the furnace is common-vented with another gas appliance d. a double-wall vent connector is used at the chimney opening
____ break down the organic material into their ecosystems
A) Users B) Producers C) Decomposers D) Transformers
When operating at the proper refrigerant charge, ice production in flake ice machines depends on two main factors. List these factors.
What will be an ideal response?
Two resistors, an R1 of 400 ? and an R2 of 600 ?, are connected in parallel across a 60 mA current source. The current through R1 is
A) 24 mA B) 36 mA C) 12 mA D) 60 mA