Technician A says, upon heavy acceleration, the pinion attempts to climb up the ring gear due to an "equal and opposite" reaction. Technician B says this action attempts to raise the front of the differential housing. Who is correct?
A. A only
B. B only
C. both A and B
D. neither A nor B
Answer: C
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Debilitating back injuries are common among motorcycle mechanics. List three ways you can prevent becoming a victim of back injury.
What will be an ideal response?
Match each item with a statement below.
A. Create light when electricity passes through a tungsten filament encased in glass, causing it to glow and create light. B. Use a filament inside a compact glass envelope filled with gas. C. Create light when electricity passes through gas inside a phosphorous-coated glass tube, causing it to glow. D. Semi-conductors that glow when electrical current passes through them. E. A variation on fluorescent technology that use an electromagnet to cause gas in the lamp to glow. F. A variation on incandescent lamps that are made with mercury vapor, metal halide, and high and low pressure sodium gases.
The evaporator in a refrigeration system ____.
A. reduces the boiling point of the refrigerant B. condenses the refrigerant C. absorbs heat from the product to be cooled D. compresses the refrigerant vapor
Answer the following statement(s) true (T) or false (F)
1. Industry is operated by three-phase power, so it is necessary to change three-phase alternating current into direct current. 2. There are two types of three-phase rectifiers: the half-wave and the bridge. 3. The three-phase bridge type rectifier has a higher average DC voltage than the three-phase, half-wave rectifier. 4. Six-phase half wave rectifiers produce two times the ripple as a three-phase full-wave rectifier. 5. The amount of ripple produced by a rectifier can become a matter of great importance; for this reason, there are rectifiers that operate on 4, 8, or 16 phases.