Technician A says that all piston pins are offset from the centerline of the piston. Technician B says that most piston pins are pressed-fit in the connecting rod. Who is right?
A. ?Technician A only
B. ?Technician B only
C. ?Both A and B
D. ?Neither A nor B
Answer: B
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A. designer's B. architect's C. engineer's D. standard
Do not disconnect ____. They contain pressurized refrigerant.
A. air cleaners B. alternators C. battery cables D. air-conditioning hoses
A cylindrical hole is drilled in a block, and a cylindrical piston is placed in the hole. The clearance is equal to one-half the difference between the diameters of the hole and the piston. The diameter of the hole is normally distributed with mean 15 cm and standard deviation 0.025 cm, and the diameter of the piston is normally distributed with mean 14.88 cm and standard deviation 0.015 cm. The diameters of hole and piston are independent.
a. Find the mean clearance. b. Find the standard deviation of the clearance. c. What is the probability that the clearance is less than 0.05 cm? d. Find the 25th percentile of the clearance. e. Specifications call for the clearance to be between 0.05 and 0.09 cm. What is the probability that the clearance meets the specification? f. It is possible to adjust the mean hole diameter. To what value should it be adjusted so as to maximize the probability that the clearance will be between 0.05 and 0.09 cm?
Ostracism, which the Athenians introduced during the interwar years (489–481 BCE), was a
a. democratic technique for expelling dangerous individuals. b. democratic technique for electing talented men to high office. c. system of raising taxes to build a powerful Athenian navy to resist any future Persian attack. d. means of negotiating a peace treaty with Persia through the mediation of Lydia.