NOCTI Applied Technical Mathematics 2

Question 1

A pipe with an outer diameter of 4 inches has a wall thickness of 0.25 inches. What is the inner diameter?

Accepted Answer

3.5 inches

Answer

3.75 inches

Answer

3.25 inches

Answer

3.0 inches

Question 2

Convert 3/8 inch to its decimal equivalent.

Accepted Answer

0.375 inches

Answer

0.250 inches

Answer

0.380 inches

Answer

0.325 inches

Question 3

What is the area of a circle with a radius of 7 inches? (Use pi approximately equal to 3.14)

Accepted Answer

153.86 square inches

Answer

43.96 square inches

Answer

21.98 square inches

Answer

307.72 square inches

Question 4

A staircase has a total rise of 9 feet. If each riser is 7.5 inches tall, how many risers are needed?

Accepted Answer

14

Answer

12

Answer

15

Answer

16

Question 5

What is 15% of 240?

Accepted Answer

36

Answer

32

Answer

40

Answer

34

Question 6

A rectangular concrete slab measures 12 feet long, 8 feet wide, and 4 inches thick. How many cubic feet of concrete are needed?

Accepted Answer

32 cubic feet

Answer

384 cubic feet

Answer

48 cubic feet

Answer

128 cubic feet