Some hybrid electric vehicles (HEVs) use a CVT that is based on the use of electric motors/generators to vary drive ratios.
Answer the following statement true (T) or false (F)
True
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Most operating coils are ____ by contacts to prevent an accidental coil burnout.
a. disconnected automatically b. monitored regularly c. connected intermittently d. normally disconnected
According to Ohm’s law, a 120-volts branch circuit with a total circuit resistance of 15 ohms will have a current flow of ____________________ amperes.
Fill in the blank(s) with the appropriate word(s).
The cutting speed is:
A) Lower for harder materials B) Lower for softer materials C) The same for soft or hard materials D) None of the above
What type of heat pump systems require a secondary refrigerant?
A) Older CFC systems whose primary refrigerant is no longer available B) Two stage systems C) Closed loop water source systems D) Cascade heat pump systems