An air to water heat pump is typically used for
A) Industrial process heating B) Domestic hot water heating
C) Both house and domestic hot water heating D) House heating
C
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Technician A says that spread is when the bearing insert extends above the parting surface. Technician B says that crush is what keeps the bearing from spinning in the bearing bore. Who is right?
A. ?Technician A only B. ?Technician B only C. ?Both A and B D. ?Neither A nor B
Which class of animals normally eats only plant tissue?
A) Herbivores B) Carnivores C) Omnivores
The major classifications of welding machines are ____.
A. multiple core, inversion, transformer B. multiple inversion, transformer core, and step-down C. multiple coil, movable coil, movable core, and inverter D. magnetic core, movable coil, and transformer
Answer the following with regard to the TTT diagram of a steel of eutectoid composition, shown in Fig. 18.13, and assumed that the specimens involved in the various cooling paths were cut from a thin sheet and austenitized at 750°C before cooling. Describe the microstructure resulting from being:
(a) Cooled to room temperature in less than 1 second. (b) Cooled to 160°C in less than 1 second, and then maintained at this temperature for several years. (c) Quenched to 650°C, and held at this temperature for 1 day, then quenched to room temperature.