The maximum safe concentration of carbon dioxide (CO2) in an occupied space is _____
a. 900 ppm
b. 1,000 ppm
c. 1,200 ppm
d. 1,500 ppm
b
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An automobile insurance company divides customers into three categories, good risks, medium risks, and poor risks. Assume that 70% of the customers are good risks, 20% are medium risks, and 10% are poor risks. Assume that during the course of a year, a good risk customer has probability 0.005 of filing an accident claim, a medium risk customer has probability 0.01, and a poor risk customer has probability 0.025. A customer is chosen at random.
a. What is the probability that the customer is a good risk and has filed a claim? b. What is the probability that the customer has filed a claim? c. Given that the customer has filed a claim, what is the probability that the customer is a good risk?
PROBLEM 3.130 Shafts A and B are made of the same material and have the same cross-sectional area, but A has a circular cross section and B has a square cross section. Determine the ratio of the maximum torques TA and TB when the two shafts are subjected to the same maximum shearing stress Assume both deformations to be elastic.
Storage reservoir walls ____.
A. are designed to store water for future use B. are capable of absorbing water and drying out without damage to the structure C. cannot absorb water without risking structural damage D. can absorb a small amount of water but risk structural damage
How many diodes are used in a typical 3-phase, full-rectification truck alternator?
A. 3 B. 6 C. 9 D. 12