Describe the three ways in which ball bearings are lubricated and how often each should be done.
What will be an ideal response?
The permanently lubricated bearings are sealed at the factory and only rarely require additional lubrication. The packed lubrication of ball bearings is done by hand; the bearing must be disassembled and hand packed with grease every two to five years. Many ball bearings are equipped with a grease fitting and should be lubricated every two years.
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These materials are clay, glass, refractory, and inorganic cements that are very hard, brittle, and resistant to heat, chemicals, and corrosion.
a. carbon b. ceramic c. composites d. graphite
Technician A says that in non-servo drum brakes, the forward or leading shoe is energized in normal braking when the vehicle is in forward motion. Technician B says that in non-servo drum brakes, the leading and trailing shoes exchange roles when the vehicle reverses motion. Who is correct?
A. Technician A B. Technician B C. Both A and B D. Neither A nor B
When checking stability, how high should the vehicle be raised?
A) About 2 inches (5 cm) B) About 3 feet (91 cm) C) About 1 foot (30 cm) D) About 6 inches (15 cm)
A GE SoftWhite Longlife lightbulb is rated as follows:
The resistance of the filament of the bulb, measured with a standard multimeter, is 16.7 ?. When the bulb is connected into a circuit and is operating at the rated values given above, determine
a. The resistance of the filament.
b. The efficiency of the bulb.