Which type of compressor chiller uses a pair of rotors to compress the refrigerant gas?
A) Scroll compressor chillers B) Reciprocating compressor chillers
C) Screw compressor chillers D) Centrifugal compressor chillers
C
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____ lasers are at the heart of fiber-optics.
A. Semiconductor B. Carbon dioxide C. Metal D. Water-based
Two technicians are discussing testing coolant for proper pH. Technician A says that coolant has a pH above 7 when new and becomes lower with use in an engine. Technician B says that OAT and HOAT coolants have a lower pH when new compared to the old green IAT coolant. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians A and B D) Neither technician A nor B
The outboard shoe of a single piston caliper is pushed against the rotor by the ________
A) Caliper body B) Piston C) Caliper mounting D) Push rod
Three-wire controls need four wires to connect the control device into the circuit.
Answer the following statement true (T) or false (F)