Batteries serve four main purposes: provide power for ignition-off accessories, supply current for the starter motor, permit the vehicle to operate for a short period of time in the event of charging system failure, and _______?
A. provide ballast
B. stabilize the electrical system
C. provide a positive temperature coefficient
D. limit the production of lead dioxide emissions
Answer: B
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In a Rankine cycle, superheated steam that enters the turbine at 1273.15 K and 1.8 MPa is then expanded to a vapor at 0.1 MPa. What is the shaft work generated per kilogram of steam if the efficiency of the turbine is 0.56?
A. -723 kJ/kg B. -1.3 MJ/kg C. -723 J/kg D. -2.3 MJ/kg E. Insufficient information to solve
Answer the following statement(s) true (T) or false (F)
1. Materials whose atomic structures do not readily provide free electrons are referred to as good conductors. 2. Conductors and insulators merely represent two extremes between which a great variety of materials are classified as poor conductors or semiconductors. 3. The thicker a wire, the greater its resistance. 4. As the temperature rises, the resistance of metals decreases. 5. The rate at which metals increase in resistance at normal temperatures is called the temperature coefficient of resistance.
A drawing, when completely dimensioned and with necessary notes added, is called a(n) ____ because it furnishes all the information required to construct the object.
A. finished drawing B. intermediate drawing C. working drawing D. complete drawing
When and where was perspective first used in drawing objects?
What will be an ideal response?