Technician A says that Siemens HEUI uses a horizontal actuator spool. Technician B says that the HEUI actuator spool linear movement is vertical. Who is correct?

A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A nor B


Answer: A

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An ________ is a surface seed covering structure that has a high oil content. It is attractive to ants that use it as a food source and in the process help disseminate the seeds.

Fill in the blank(s) with the appropriate word(s).

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What type of reactor is a reactor vessel in which the catalyst bed is stationary as the reactants are passed over it?

A) Tubular reactor B) Fixed bed reactor C) Stirred tank reactor D) Fluidized bed reactor

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The major types of compressors listed by mechanical design are:

A) Air cooled, water cooled, and refrigerant cooled. B) Reciprocating, rotary, scroll, screw, and centrifugal. C) Forward curved, backward curved, radial, in-line. D) Hermetic, semihermetic, and open.

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All of the following statements about the hand valves in an air conditioning gauge manifold are true, EXCEPT:

A. When both hand valves are closed, both the low- and high-side hose ports are connected only to the low- and high-side gauges. B. If either hand valve is cracked open and the center hose is opened, refrigerant pressure will equalize across the system. C. The gauges show respective system pressures when the manifold hand valves are closed. D. If both manifold hand valves are cracked, the pressures will equalize in the manifold and neither of the gauges will accurately indicate system pressure.

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