How does an energy-recovery wheel improve system efficiency?
A) By keeping the evaporator clean
B) By moving some of the system refrigerant with a turbulator
C) By reducing the condenser head pressure
D) By transferring heat between the ventilation air and the exhaust air
D
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Technician A says that some piston rings have chamfers or reliefs cut into them to cause them to twist. Technician B says that chrome rings should not be used in out-of-round cylinders. Who is right?
A. ?Technician A only B. ?Technician B only C. ?Both A and B D. ?Neither A nor B
Find angle x in the accompanying figure. All dimensions are in inches. Give your answer to the nearest minute.
A. 14o13' B. 15o14' C. 16o15' D. 17o16'
The projection from one or both faces that occurs in some gears is called the bore.
Answer the following statement true (T) or false (F)
____ help engineers determine how much earth must be moved and how much land must be purchased when a road is to be built.
A. Contour drawings B. Profile-curved line drawings C. Cut-and-fill drawings D. Plan and profile drawings