Ground-up aluminum can react violently with which of the following?
A) CFC and HFC B) CFC C) HFC D) Oxygen
C
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Typical journal-to-bearing clearance is ________
A) 0.0005 to 0.0025 inch B) 0.00015 to 0.00018 inch C) 0.020 to 0.035 inch D) 0.150 to 0.250 inch
Leaves are where the manufacture of food takes place
Indicate whether the statement is true or false.
When do normally closed relay contacts close?
A) When the relay coil is de-energized B) When the relay coil is energized C) When they receive power D) They are always closed because they are closed contacts.
When troubleshooting a residential heating system, the technician reads 24 volts at the gas valve on a call for heat, but the gas valve does not energize. What would be the most likely problem?
A. defective gas valve B. defective thermostat C. defective transformer D. blown low-voltage fuse