What would be the final volume of 4 ft3 of gas that is compressed from 60°F at 70 psig to 150° at 210 psig?
A) 22 ft3 B) 1.8 ft3 C) 2.2 ft3 D) 4.4 ft3
B
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What must engineers and designers know when designing piping and valve systems?
A. Viscosity of the substance B. Temperature of the substance C. How much pressure the substance exerts D. All of the above
A ____ is an electromagnetic device that can do mechanical work, such as switching electrical, vacuum, gas, and liquid circuits.
A. diode B. solenoid C. potentiometer D. motor
Technician A says that a radio can receive AM signals, but not FM signals, if the antenna is defective. Technician B says that a good antenna should give a reading of about 500 ohms when tested with an ohmmeter between the center antenna wire and ground. Who is right?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
In a lot of 10 components, 2 are sampled at random for inspection. Assume that in fact exactly 2 of the 10 components in the lot are defective. Let X be the number of sampled components that are defective.
a. Find P(X=0). b. Find P(X=1). c. Find P(X=2). d. Find the probability mass function of X. e. Find the mean of X. f. Find the standard deviation of X.