The most popular secondary fluid currently used in refrigeration systems is ____.
A. HFE
B. ethylene glycol
C. HCFC
D. propylene glycol
Answer: D
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A controlled amount of water and additives are then fed into the mixer and each batch is mixed for _____ .
A. 2 to 3 minutes B. 5 to 7 minutes C. 6 to 8 minutes D. 10 to 12 minutes
?Today's springs are designed with a __________ frequency beyond the normal operating range of the engine.
What will be an ideal response?
All of the following were results of the Fugitive Slave Act of 1850 EXCEPT
A. many people were drawn into the antislavery movement. B. Northerners who aided slaves in escaping faced heavy fines and jail sentences. C. federal commissioners handling the cases of runaways received twice as much in a bonus if the slave was returned. D. Northerners protested the capture of individual runaway slaves. E. the Underground Railroad scaled back its efforts.
The engine that is MOST-Likely to have two separate cam lobes to operate its intake and exhaust valves in each cylinder is:
A. single overhead cam (SOHC) B. a pushrod engine C. dual overhead cam (DOHC) D. overhead cam (OHC)