What is one disadvantage of a retractable roof greenhouse?

What will be an ideal response?


A single covering is used on the greenhouse that looses more heat than
double roof coverings.

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____ drawings are helpful in the interpretation of prints and the assembly of parts.

A. Assembly B. Usage C. Subassembly D. Building

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What is plastigage used for measuring?

A. crankshaft endplay B. big end side play C. bearing clearance D. flywheel runout

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Which tool is used to measure U-Joint working angles?

A) Dial indicator B) Micrometer C) Vernier caliper D) None of these are correct

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What type of compressors are most commonly used in rooftop packaged units?

A) Semihermetic scroll or semihermetic rotary compressors B) Open-type centrifugal and open-type screw compressors C) Hermetic reciprocating or hermetic scroll compressors D) Hermetic rotary and hermetic centrifugal compressors

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