Umbrella-type valve stem seals ________
A) Fit tightly onto the valve guide
B) Fit tightly onto the valve stem
C) Fit on the valve face to prevent combustion leaks
D) Lock under the valve retainer
B
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What will be an ideal response?
What part is NOT used on an electric power steering system?
A) Steering shaft torque sensor B) Power steering motor C) Flow control valve D) Steering wheel position sensor
In a hydraulic system, movement depends on _____
A) flow rate B) temperature C) pressure D) flow
This exercise will lead you through a proof of Chebyshev’s inequality. Let X be a continuous random variable with probability density function f (x). Suppose that P(X < 0)=0, so f (x)=0 for x ? 0.
a. Show that 
.
b. Let k > 0 be a constant. Show that 
.
c. Use part (b) to show that 
. This is called Markov’s inequality. It is true for discrete as well as for continuous random variables.
d. Let Y be any random variable with mean µ Y and variance 
. Show that 
.
e. Let k > 0 be a constant. Show that P
.
f. Use part (e) along with Markov’s inequality to prove Chebyshev’s inequality: 