How often should the vacuum pump oil be changed?
A. every 3 months of operation
B. every other time it is used
C. before each use
D. every 8 hours of operation
Answer: C
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Measurements are being discussed. Technician A says a magnifying glass is sometimes helpful when reading a vernier scale. Technician B says 24.5 mm equals one inch. Which technician is correct?
A. Technician A B. Technician B C. Both technicians D. Neither technician
Barbara had a pond dug with the outside of the dam making an angle of 30° with the horizontal. The dam is 16 feet high (Figure 3-3).
a. What is the slope of the outside of the dam?
b. How long is the dam in feet?
Describe two disadvantages of SAR respirators.
What will be an ideal response?
The top of a tire is tilted out when viewed from the front. This is considered to be ________
A) Positive camber B) Positive caster C) Negative camber D) Negative toe