Compared to centrifugal chillers, screw chillers generally:
A) Are physically smaller for comparable capacity.
B) Operate at lower compression ratios.
C) Are arranged in multiple stages to improve compression ratio.
D) Are physically larger for comparable capacity.
A
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An IR autofocus system has emitter and detector apertures separated by 1cm and modeled as pin holes. The light reflected from an object at range r casts a spot that is detected at a displacement of 0.1mm from the detector axis. The detector lies 0.5cm behind the pin hole. The value of r equals _____ (x.x m)
Fill in the blank(s) with the appropriate word(s).
Which compressor type has the motor separated from the compressor?
a. Open-drive compressor b. Scroll compressor c. Rotary compressor d. Hermetic compressor
Mechanical digestion in birds occurs in the mouth, just as it does in mammals.
Answer the following statement true (T) or false (F)
Technician A says that battery load test loads the battery to one-half of its CCA rating. Technician B says that a good battery should be able to maintain higher than 9.6 volts for a 25 second test period. Who is right?
A) Technician A only B) Technician B only C) Both A and B D) Neither A nor B