Rad135 Ch1 Basic Mathematics

Test Description: This content covers chapter 1 (Basic Mathematics) from the text to help you prepare for the midterm exam in Rad135.

Instructions: Answer all questions to get your test result.

1) Solve for R: 2/3 + 1/2 = 1/R

2) 4/5 x 1/3 = ?

3) What is the prefix for 10^-9?

4) 1,825 / 0.2 = ?

5) 2(3 + 5) + 1 -17 = ?

6) Round 45.04167 to 2 decimals.

7) What is the standard unit of time?

8) What is the prefix for 10^6?

9) What must be done first in the order of operations?

10) Simplify in terms of x: ( (3x^2)^2) + x^3 x) / 2x

11) What would the exposure time in milliseconds (ms) at 55 mAs using 100 mA?

12) Which unit is equal to 10 to the 6th power?

13) If the primary voltage is 120 volts and 3 amperes, what will the secondary voltage be if the turns ratio is 1000:1?

14) How many significant digits does 45.04 have?

15) 2/3 + 1/2 = ?

16) Round 82.1591 to four significant digits.

17) Given 1/RT = 1/R1 + 1/R2 + 1/R3 . Solve for RT, if R1=7, R2 = 3 and R3 = 5.

18) Using dimensional analysis, convert the speed of light from 3 x 10^8 m/s to mph.

19) What is the SI unit for measuring electric current?

20) The maximum number of electrons that can occupy a given electron shell is equal to 2n^2, where n is the principal quantum. How many electrons can occupy the Q shell? Hint: in K shell n=1, in L shell n=2, in M shell n=3 ...


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