Mathematical Questions Flashcards
How is a mixed number changed to an improper fraction?
The whole number is multiplied by the denominator of the fraction and then added to the numerator to form the number of the improper fraction.
Before you add or subtract fractions, what must you do with the denominators?
Before you add or subtract fractions, convert all the denominators to a common denoimator.
What is the rule for multiplying fractions?
To multiply fractions , multiply the numerators and the denominators separately.
What is the rule for dividing fractions?
To divide fractions, invert the divisor and proceed as in multiplication.
How do you reduce a fraction to a demical?
To reduce a fraction to a decimal, divide the numerator of the fraction by the denominator.
What is a proportion?
A proportion is the equality of two ratios.
What is the formula for computing the area of a:
A.) Rectangle
B.) Square
C.) Triangle
A) Area = L x W
B) Area = S(squared)
C.) Area = 1/2xBxH
What is the formula for computing the volulme of a:
A.) Rectangular solid
B.) Cylinder with a circular base
C.)Cylinder with an elliptical base
A.) LxWxH
B.) pi x Radius(squared) x height
C.) pi x A x B x N
The value of 9 3/4” expressed in feet is most nearly:
A.) 0.67
B.)0.75
C.)0.813
D.)1.15
C.) 0.813
If an isometric drawing has one axis vertical , then the other tow axes make an angle with the horizontal equal to …
A.)30°
B.)45°
C.)60°
D.)90°
D.)90°
A sewer is laid on a slope of 0.25% between two manholes 180 feet apart. THe difference in elevation between the upstream and downstream ends of the sewer is MOST NEARLY ___ feet.
A.)0.45
B.) 0.60
C.)0.90
D.)1.80
A.) 0.45
Two gears of different diameters are meshed together. If the larger gear rotates at 100 rpm, the SMALLER gear will rotate…
A.)Faster
B.)Slower
C.) At the same speed
D.)First in one direction, then in the other
A.) Faster
A meter is , in inches, MOST NEARLY…
A.) 39.4
B.)46.2
C.)50.0
D.)100.0
A.) 39.4
