The commutator segments continually change polarity from positive to negative, which causes the magnetic field in the armature to change polarity form north pole to south pole
Indicate whether the statement is true or false
TRUE
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Answer the following statement(s) true (T) or false (F)
1. A DC motor is generally operated at or below normal speed. 2. The shunt field power supply is generally designed to remain turned on even when the main (armature) power supply is turned off. 3. If current flow through the shunt field is interrupted, a compound wound, DC motor will become a series motor and race to high speeds 4. The armature of a large DC motor has high resistance 5. If load is added to a motor, the motor speed increases.
What is the main advantage of a low spring design over a high spring type in a typical multi-orifii injector assembly?
A. ease of setting NOP B. mass of moving parts is reduced C. lower maintenance costs D. improved emissions
What is a distillate oil?
A) Distillates are bio-fuels manufactured from ethanol. B) Distillates evaporate at relatively low temperatures. C) Distillates are filtered to remove impurities. D) A distillate is what is left after all the residuals have been vaporized.
Technician A says that a liter is slightly smaller in volume than a U.S. quart. Technician B says that 3.78 liters equal one U.S. gallon. Who is correct?
A. A only B. B only C. Both A and B D. Neither A nor B