The most common type of foundation brake found on heavy vehicles is the:
a. S-cam drum.
b. Disc.
c. Wedge drum.
a. S-cam drum.
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Discuss the basic differences (in terms of chemical composition and important properties) among wrought iron, cast iron, and steel. Where would you recommend the use of wrought iron?
What will be an ideal response?
Technician A says atmospheric pressure decreases as altitude increases. Technician B says atmospheric pressure increases as altitude increases. Who is correct?
A. Technician A B. Technician B C. Both A and B D. Neither A nor B
The term viscosityindexrefers to _____
a. the lowest temperature at which an oil flows freely b. how the viscosity of oil varies with temperature c. the temperature index at which oil gives off ignitable vapors d. the service life of various oil and grease products
Why does a heat pump need two metering devices?
A) One metering device is used for first-stage heat and another for auxiliary heat. B) Two metering devices provide increased refrigerant flow at low ambient temperatures in heat. C) One metering device is used for the refrigerant circuit and another for the heat strips. D) One metering device is used for the cooling cycle and one for the heating cycle.