A mat of reinforcing bars used in a slab is usually supported above the subgrade at a distance of _____.

a. 3 inches
b. 4 inches
c. 5 inches
d. 6 inches


a. 3 inches

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The exhaust blower unit consists of a three-horsepower, three-phase, 208-volt motor driving a propeller-type fan through a(n) ____ drive.

A. V-belt B. direct C. O-ring D. conveyer

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The motor is driving a constant torque load at a speed of 570 rpm.

A 500-hp, three-phase, 2200 V, 60-Hz, 12-pole, Y-connected, wound-rotor
induction motor has the following parameters:

a. Calculate the load torque.
b. Calculate the motor speed when the source frequency is increased to 70 Hz.
c. Calculate the change in starting torque due to the frequency change.

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You use the ____________________ command to loop through a range of values.

Fill in the blank(s) with the appropriate word(s).

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An automobile costs $8,000.00 and is sold at a profit of 10% on the cost price. What is the profit?

A. $750 B. $800 C. $850 D. $900

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