North Carolina
Occupational Safety and Health Education & Research Center
University of North Carolina at Chapel Hill
INSTITUTE PRETEST
The purpose of this pretest is to determine the level of your math skills and readiness status to use a scientific calculator accurately. You should be able to complete the following types of problems before you attend institute classes that requires you to bring a scientific calculator and to be familiar with its use.
You may complete this pretest at your leisure, using reference books and a calculator. For those of you who have difficulty with this pre test, please consider attending Math Review and Use of Scientific Calculator on the Sunday prior to the course from 2:00-4:00 PM at the meeting site.
Dr. Nelson W. Couch will guide you through the review on Sunday before you are required to use these techniques in your class at the institute. Be sure to bring a scientific calculator. If you need to purchase one, the Texas Instruments TI-30Xa calculator (click here for picture) will be the calculator used during these sessions.
1. If solve for VPDUCT.
2. If Q = AV solve for V.
3. If SPH = (1 + FH)VPDUCT , solve for FH.
4. Mole fraction = X1/(X1+X2) set up a numerical example.
5. Calculate the number of centimeters (cm) in a statue mile.
6. V= (FR)/(time) solve for FR.
7. How many ml are there in 1 L.
8. How many L are there in 1m3.
9. How many µg are there in 1 mg.
10. How many mg are there in 1 g.
11. How many L are there in 1 ft3.
12. How many cm are there in 1 inch.
13. How many g are there in 1 pound.
14. V= (FR)/(time) solve for time.
15. What is the definition of density?
16. What is the definition of specific gravity?
17. Calculate the time weighted average from the following exposure data.
A degreaser operator is monitored for exposure to Stoddard solvent. The result of the monitoring survey are given in Table 1.
Table 1
TIME PERIOD(NUMBER) / TIME
(hr) / CONCENTRATION
(ppm) / CITI
(ppm hr)
1 / 2 / 80 / 160
2 / 4 / 110 / 440
3 / 2 / 55 / 110
TOTALS / 8 / N/A / 710
18. An air sampling pump operate at 16.5 ml per minute. How many m3 are collected after 480 minutes.
19. What is the definition of vapor pressure.
20. Convert 25°C to Kelvin temperature.