?Following an installation of a rebuilt engine, a technician breaks in the engine by accelerating from 45 mph to 55 mph and coasting back to 45 mph several times. During this process, which of the following is/are true?
A. ?Rings are pushed against the cylinder walls under pressure conditions.
B. ?Rings are pushed against the cylinder walls under vacuum conditions.
C. Oil is drawn onto the cylinder walls during deceleration to prevent scuffing.
D. ?All of the above
E. ?None of the above
Answer: C
You might also like to view...
Answer the following statement(s) true (T) or false (F)
1. Mechanical type brakes cannot hold a suspended load.
2. In the accompanying figure, the brake is applied automatically when the motor is not operating.
3. Dynamic braking for a DC motor is very effective, but the braking effect becomes weaker as the armature slows down.
4. Plugging is used with direct current motors more than with three phase squirrel cage motors.
5. One method of providing plugging control is with the use of an automatic timed circuit.
? Identify and state the historical significance of Alfred M. Landon.
What will be an ideal response?
The most-commonly-used side view is the left-side view.
Answer the following statement true (T) or false (F)
Specific gravity is used in the HVACR industry:
A) For charging air conditioners. B) For determining system capacity. C) For sizing gas lines. D) For recovering refrigerant.