Why is chordal action a problem in a chain drive?
What will be an ideal response?
The pulsations produced by chordal action generates noise and vibration and considerably limits the power capacity and speed range of a roller chain.
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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
____________________________ heat pumps utilize two coaxial heat exchangers, as compared to only one on the water-to-air configuration.
Fill in the blank(s) with the appropriate word(s).
In a servo brake, the secondary shoe provides approximately what percentage of the total stopping power?
A) 75 B) 30 C) 70 D) 55
Vortex vanes on an electric centrifugal chiller ____________________
A. provide a way to coast the compressor wheel to a stop B. prevent compressor surging C. help control compressor capacity D. separate out non-condensable gasses