A forced draft medium temperature evaporator would ____.

A. be defrosted by off-cycle defrost
B. not need to be defrosted
C. need electric defrost
D. need a hot gas defrost


Answer: A

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After shutdown of a centrifugal chiller is initiated, the compressor, chilled-water pump, and oil pump stop but the tower fans continue to run. The most likely reason is the _____.

a. stop-to-start timer is activated b. compressor start relay is energized c. condenser water temperature remains high d. recycle shutdown mode has been activated

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Which tool is most often used to measure suspension component free play?

A) Telescoping gauges B) Micrometer C) Dial indicator D) Vernier caliper

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Two technicians are discussing emission controls and related failure symptoms. Technician A says that if the hot air hose is missing on an engine with a thermostatic air cleaner, NOx emissions will be higher than normal. Technician B says that a faulty second-ary air system can cause backfiring. Who is right?

What will be an ideal response?

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A system impulse response h(t) has a unilateral Laplace transform,

(a) What is the region of convergence for H (s)? (b) Could the CTFT of H (t) be found directly from H (s)? If not, why not?

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