A type of fastener with a bugle-shaped head is a _____.
a. drywall screw
b. drive screw
c. thread-forming screw
d. lag screw
a. drywall screw
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Which of the following would provide higher valve seating force?
A. 30 degree cut valve B. 45 degree cut valve C. solid lifter valve trains D. roller type cam followers
List four heat pump classifications.
What will be an ideal response?
What is the purpose of the zone 1 (master) thermostat in the basic zone control system?
A) The zone 1 thermostat determines the on and off cycling of the unit. B) The zone 1 thermostat controls the operation of all zone dampers. C) The zone 1 thermostat determines the operational mode of the equipment. D) The zone 1 thermostat controls the master bedroom.
What device is used to signal engine coolant temperatures on most current diesel engines?
A. PTC thermistor B. NTC thermistor C. expansion tube D. bimetal electric sensor