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You should AVERAGE answering each question in less than 100 seconds for this exam Note: All of the following questions contain only one best answer. Circle the letter that best corresponds with the question. |
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1 |
Which equation is correct? |
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a. |
°C = 1.8(°F) + 32 |
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b. |
°F = 1.8(°C) + 32 |
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c. |
°C = 5/9(°F + 32) |
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d. |
°F = 9/5(°C + 32) |
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2 |
What number is the same temperature on the Celsius and Fahrenheit Scale? |
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a. |
-40 |
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b. |
+40 |
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c. |
-10 |
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d. |
+10 |
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3 |
A Fahrenheit degree is _____ than a Celsius degree. |
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a. |
bigger |
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b. |
equal |
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c. |
smaller |
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d. |
both a and b |
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4 |
One liter of 1 Molar NaCl solution contains about how many grams of NaCl? |
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a. |
23 |
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b. |
35 |
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c. |
58 |
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d. |
1 |
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5 |
A laboratory technician wishes to set an oven at 103 °C. The only thermometer is calibrated in degrees Fahrenheit. The oven should be set to read |
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a. |
185 °F |
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b. |
89 °F |
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c. |
217 °F |
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d. |
135 °F |
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6 |
The temperature reading was 15 °C. what is the temperature in °F? |
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a. |
47.0 °F |
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b. |
59.0 °F |
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c. |
40.3 °F |
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d. |
84.6 °F |
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7 |
60.0 °F equals |
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a. |
16 °C |
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b. |
65 °C |
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c. |
51 °C |
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d. |
50 °C |
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8 |
What temperature in °C is equivalent to 95 °F? |
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a. |
71 °F |
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b. |
35 °F |
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c. |
63 °F |
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d. |
113 °F |
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9 |
If the temperature of a wastestream is 85 °F, what is the Celsius temperature? |
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a. |
65 °C |
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b. |
29 °C |
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c. |
95 °C |
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d. |
53 °C |
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10 |
31 °C is |
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a. |
85.4 °F |
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b. |
87.8 °F |
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c. |
88.0 °F |
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d. |
89.2 °F |
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11 |
The conversion factor between mg/L and % is |
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a. |
1,000,000 |
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b. |
100,000 |
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c. |
10,000 |
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d. |
1000 |
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12 |
Find the standard deviation of the variance 139.82 |
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a. |
277.8 |
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b. |
16.8 |
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c. |
69.5 |
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d. |
11.8 |
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13 |
Given the following data what is the range? All results are in ppm. 100,250,150,105,208,188 |
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a. |
150 |
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b. |
154 |
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c. |
153.5 |
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d. |
100 |
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14 |
What is the arithmetic mean of the following analysis? All results are in mg/L. 160,155,160,160,180,165,155,170,160,165,155,150,145,160 |
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a. |
35 |
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b. |
165 |
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c. |
160 |
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d. |
180 |
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15 |
What is the range of the following analysis? All results are in mg/L. 160,155,160,160,180,165,155,170,160,165,155,150,145,160 |
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a. |
35 |
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b. |
165 |
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c. |
160 |
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d. |
180 |
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16 |
Determine the median value of the following data. 220,7200,230,300,240,270,240,250,240,260 |
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a. |
881.8 |
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b. |
240 |
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c. |
300 |
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d. |
250 |
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17 |
There are 8.34 pounds per gallon of water. If a sample analyzes as 0.89 mg/L, what is the concentration of chlorine in lbs/MG? |
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a. |
0.89 |
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b. |
8.9 |
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c. |
10.4 |
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d. |
7.4 |
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18 |
5.31 mL of 0.12M K2Cr2O7 contains how many mg of potassium dichromate? |
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a. |
5.31 |
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b. |
0.637 |
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c. |
187 |
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d. |
63.7 |
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19 |
4.10 g of K2Cr2O7 is added to 750 mL of 0.141M K2Cr2O7. What is the final concentration? |
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a. |
0.0139M |
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b. |
0.0186M |
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c. |
0.160M |
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d. |
0.141M |
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20 |
10.71 mL of 0.0200N H2SO4 contains how many mg of H2SO4? |
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a. |
10.5 |
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b. |
21.0 |
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c. |
5.25 |
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d. |
42.0 |
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21 |
Calculate the BOD in mg/L of a 3 mL sample if the initial DO of the diluted sample was 8.5 mg/L and the final DO after 5 days of incubation was 4.2 mg/L. |
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a. |
4.3 mg/L |
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b. |
12.9 mg/L |
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c. |
430 mg/L |
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d. |
21.0 mg/L |
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22 |
Convert 90 °F to °C. |
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a. |
32.2 °C |
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b. |
58 °C |
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c. |
22.2 °C |
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d. |
50 °F |
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23 |
What is equal to 50 mg/L? |
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a. |
0.50 µg/L |
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b. |
500 µg/L |
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c. |
5000 µg/L |
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d. |
50,000 µg/L |
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24 |
A batch of calcium chloride is 21% by weight. How much calcium is there in 60 pounds of this batch? |
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a. |
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b. |
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c. |
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d. |
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25 |
Calculate the pounds per day of ammonia discharged if the flow from the plant is 966,000 gallons per day and the ammonia is 96.1 mg/L? |
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a. |
696.2 |
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b. |
92.8 |
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c. |
774.2 |
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d. |
none of the above |
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25 |
If the molecular weight of Ca = 40, O = 16, and H = 1, what is the formula weight of Ca(OH)2 |
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a. |
57 |
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b. |
74 |
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c. |
114 |
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d. |
none of the above |
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26 |
The secondary effluent flow at a treatment plant is 4.8 MGD. After 30 minutes of contact time, the chlorine residual is measured at 0.5 mg/L. If the chlorinator is feeding chlorine at the rate of 300 lbs/day, what is the chlorine dosage? |
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a. |
8.5 mg/L |
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b. |
8.0 mg/L |
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c. |
7.5 mg/L |
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d. |
7.0 mg/L |
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27 |
In the immediately previous question, what is the chlorine demand? |
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a. |
8.5 mg/L |
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b. |
8.0 mg/L |
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c. |
7.5 mg/L |
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d. |
7.0 mg/L |
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d. |
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b. |
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c. |
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d. |
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b. |
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