Question 1

Carry the answer to two decimal places. The lamps in the figure require a total current of 7.76 amperes. How many amperes will 2 lamps require? (All the lamps are of the same type, and each requires the same number of amperes.)

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Question 2

Carry the answer to three decimal places. What is the total thickness of these shims taken from a bearing: 0.007 inch, 0.125 inch, 0.140 inch, 0.187 inch, and 0.004 inch?

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Question 3

When the number 0.67 is entered into a calculator, it is necessary to enter the zero to the left of the number into the calculator.

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A) True 
 B)False

Question 4

Carry the answer to four decimal places. A special resistance wire has a diameter of 0.037 inch. The next smaller size is 0.0345 inch in diameter. Find the difference in the diameters.

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Question 5

Carry the answer to two decimal places. The circumference of a pulley equals the diameter multiplied by 3.1416. Find the difference in circumference between the two pulleys shown.

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Question 6

Carry the answer to three decimal places. A set of 2-inch-wide by $X _ { L }$ -inch-thick carbon brushes fits the brush holders too tightly. It is necessary to take  inch off the width and 0.015 inch off the thickness by sanding. Give in decimal form the width dimension of the carbon brushes after sanding.

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Question 7

Carry the answer to four decimal places. The inside diameter of a motor shaft bearing is 0.0075 centimeter wider than the shaft. The shaft diameter is 4.75 centimeters. What is the inside diameter of the bearing?

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Question 8

Carry the answer to four decimal places. If A = 0.305 inch, C = 1.0425 inches, and D = 3.860 inches, find B. $P = \sqrt { 3 } ( E ) ( I ) ( P F )$

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Question 9

Carry the answer to three decimal places. The weight of a spool of wire is 27.11 pounds. The spool weighs 3.2 pounds. Find the cost of the wire per pound if the cost of the spool of wire is $74.44. Express the answer to the nearer tenth of a cent.

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Question 10

Carry the answer to three decimal places. A set of 2-inch-wide by $I _ { S }$ -inch-thick carbon brushes fits the brush holders too tightly. It is necessary to take $I _ { H }$ inch off the width and 0.015 inch off the thickness by sanding. Give in decimal form the thickness dimension of the carbon brushes after sanding.

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Question 11

Carry the answer to two decimal places. A piece of $$\begin{aligned}
R = \frac { K L } { d ^ { 2 } } \quad \text { where } & R = \text { resistance in ohms } \
& L = \text { length in feet } \
& d = \text { diameter in mils } \
& K = 10.8 \text { (constant) }
\end{aligned}$$ -inch diameter copper rod is rolled down in a mill to 0.010 inch in thickness for magnet wire sleeving and clips. In decimal form, how much is the copper reduced in size?

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Question 12

Using a calculator, what is the sum of 3.5 + 4.72 + 5.56 + 0.234?

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Question 13

Carry the answer to three decimal places. The cold resistance of an armature measures 0.096 ohm. After running for 5 hours, the resistance is 1.25 ohms. What is the difference in the resistance?

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Question 14

Carry the answer to two decimal places. A certain type of cable weighs 500.88 pounds per one thousand feet. Determine the weight of 53 feet of this cable. Round the answer to the nearest hundredth.

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Question 15

Carry the answer to four decimal places. A bearing with an inside diameter of 1 $P = E I$ inches is found to be 0.008 inch oversize for the armature shaft. What should the diameter of the bearing be to fit the shaft? Allow 0.002-inch clearance for lubrication.

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Question 16

Carry the answer to four decimal places. What is the difference in diameters between 13 wire and number 15 wire?

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Question 17

Carry the answer to two decimal places. The voltage at the terminals A and B in the diagram of the electric generator shown is 219.7 volts, and the voltage drop (loss in the line) is 3.96 volts. What is the voltage at the end of the line at points C and D? $\begin{array} { l } 
I = P / E \
C M = K N L I / E _ { e }
\end{array}$

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Question 18

Carry the answer to four decimal places. If one cubic inch of copper weighs 0.314 pound, find the weight of a piece of copper that contains 2.25 cubic inches.

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Question 19

Carry the answer to four decimal places. If B = 0.500 inch and G = 2.0222 inches, find C. $P = E I$

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Question 20

Carry the answer to two decimal places. The weight of a certain wire is 145 pounds per one thousand feet. What is the cost of 600 feet of this wire at $1.40 per one hundred pounds?

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The answer of Carry the answer to two decimal places....

Exam 3: Decimal Fractions

Carry the answer to two decimal places. The lamps in the figure require a total current of 7.76 amperes. How many amperes will 2 lamps require? (All the lamps are of the same type, and each requires the same number of amperes.)

Carry the answer to three decimal places. What is the total thickness of these shims taken from a bearing: 0.007 inch, 0.125 inch, 0.140 inch, 0.187 inch, and 0.004 inch?

When the number 0.67 is entered into a calculator, it is necessary to enter the zero to the left of the number into the calculator.

Carry the answer to four decimal places. A special resistance wire has a diameter of 0.037 inch. The next smaller size is 0.0345 inch in diameter. Find the difference in the diameters.

Carry the answer to two decimal places. The circumference of a pulley equals the diameter multiplied by 3.1416. Find the difference in circumference between the two pulleys shown.

Carry the answer to four decimal places. The inside diameter of a motor shaft bearing is 0.0075 centimeter wider than the shaft. The shaft diameter is 4.75 centimeters. What is the inside diameter of the bearing?

Carry the answer to four decimal places. If A = 0.305 inch, C = 1.0425 inches, and D = 3.860 inches, find B. P=3(E)(I)(PF)P = \sqrt { 3 } ( E ) ( I ) ( P F )P=3​(E)(I)(PF)

Carry the answer to three decimal places. The weight of a spool of wire is 27.11 pounds. The spool weighs 3.2 pounds. Find the cost of the wire per pound if the cost of the spool of wire is $74.44. Express the answer to the nearer tenth of a cent.

Using a calculator, what is the sum of 3.5 + 4.72 + 5.56 + 0.234?

Carry the answer to three decimal places. The cold resistance of an armature measures 0.096 ohm. After running for 5 hours, the resistance is 1.25 ohms. What is the difference in the resistance?

Carry the answer to two decimal places. A certain type of cable weighs 500.88 pounds per one thousand feet. Determine the weight of 53 feet of this cable. Round the answer to the nearest hundredth.

Carry the answer to four decimal places. A bearing with an inside diameter of 1 P=EIP = E IP=EI inches is found to be 0.008 inch oversize for the armature shaft. What should the diameter of the bearing be to fit the shaft? Allow 0.002-inch clearance for lubrication.

Carry the answer to four decimal places. What is the difference in diameters between 13 wire and number 15 wire?

Carry the answer to four decimal places. If one cubic inch of copper weighs 0.314 pound, find the weight of a piece of copper that contains 2.25 cubic inches.

Carry the answer to four decimal places. If B = 0.500 inch and G = 2.0222 inches, find C. P=EIP = E IP=EI

Carry the answer to two decimal places. The weight of a certain wire is 145 pounds per one thousand feet. What is the cost of 600 feet of this wire at $1.40 per one hundred pounds?

Carry the answer to four decimal places. If A = 0.305 inch, C = 1.0425 inches, and D = 3.860 inches, find B. $P = \sqrt { 3 } ( E ) ( I ) ( P F )$

Carry the answer to four decimal places. A bearing with an inside diameter of 1 $P = E I$ inches is found to be 0.008 inch oversize for the armature shaft. What should the diameter of the bearing be to fit the shaft? Allow 0.002-inch clearance for lubrication.

Carry the answer to four decimal places. If B = 0.500 inch and G = 2.0222 inches, find C. $P = E I$