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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
A
0.66
B
6/7
C
1.66
D
7/6
2) 4/5 x 1/3 = ?
A
4/15
B
15/22
C
22/15
D
1/3
3) What is the prefix for 10^-9?
A
nano
B
kilo
C
deci
D
hecto
4) 1,825 / 0.2 = ?
A
912.5
B
81.25
C
9,125
D
8,125
5) 2(3 + 5) + 1 -17 = ?
A
5
B
14
C
-5
D
0
6) Round 45.04167 to 2 decimals.
A
45.0
B
45.042
C
45.04
D
45
7) What is the standard unit of time?
A
hour
B
minute
C
second
D
millisecond
8) What is the prefix for 10^6?
A
hecto
B
mega
C
pico
D
micro
9) What must be done first in the order of operations?
A
perform all operations inside grouping symbols
B
multipication and division
C
unary minus (-) or unary plus (+)
D
exponents
10) Simplify in terms of x: ( (3x^2)^2) + x^3 x) / 2x
A
5x^3
B
10x^3
C
41x^3
D
10x^2
11) What would the exposure time in milliseconds (ms) at 55 mAs using 100 mA?
A
0.55 ms
B
5.5 ms
C
55 ms
D
550 ms
12) Which unit is equal to 10 to the 6th power?
A
milli
B
mega
C
deca
D
nano
13) If the primary voltage is 120 volts and 3 amperes, what will the secondary voltage be if the turns ratio is 1000:1?
A
36 kV
B
3 mA
C
120 V
D
120 kV
14) How many significant digits does 45.04 have?
A
1
B
4
C
depends on the units
D
0
15) 2/3 + 1/2 = ?
A
3/5
B
2/6
C
7/6
D
5/3
16) Round 82.1591 to four significant digits.
A
83.00
B
82.15
C
82.16
D
82.00
17) Given 1/RT = 1/R1 + 1/R2 + 1/R3 . Solve for RT, if R1=7, R2 = 3 and R3 = 5.
A
6
B
1.48
C
15
D
0.67
18) Using dimensional analysis, convert the speed of light from 3 x 10^8 m/s to mph.
A
6.71 x 10^8 mph
B
6.71 x 10^5 mph
C
609.34 mpm
D
3 x 10^5 mph
19) What is the SI unit for measuring electric current?
A
potential difference
B
ampere
C
volt
D
frequency
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 ...
A
14 e-
B
16 e-
C
64 e-
D
98 e-
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