1. Thermodynamics
Units and Properties

2. 1. An atmospheric pressure of 15.0 psia is equivalent to...
30.0 psig.
29.4 psig.
14.7 psig.
0.0 psig.
P72
Correct Answer: D

3. 2. Assuming a standard atmospheric pressure of 15 psia, 5 inches of mercury (Hg) vacuum is equivalent to...
2.5 psia
5.0 psia
10.0 psia
12.5 psia
P473
Correct Answer: D

4. 3. Which one of the following is arranged from the lowest pressure to the highest pressure?
8 psia, 20 inches Hg absolute, 2 psig
8 psia, 2 psig, 20 inches Hg absolute
20 inches Hg absolute, 2 psig, 8 psia
20 inches Hg absolute, 8 psia, 2 psig
P1273
Correct Answer: A

5. 4. Which one of the following is the approximate condenser vacuum when condenser pressure is 16 inches Hg absolute?
4 inches Hg vacuum
8 inches Hg vacuum
12 inches Hg vacuum
14 inches Hg vacuum
P2173
Correct Answer: D

6. 5. A water storage tank is vented to atmosphere
5. A water storage tank is vented to atmosphere. The tank is located at sea level and contains 100,000 gallons of 80oF water. A pressure gauge at the bottom of the tank reads 5.6 psig. What is the approximate water level in the tank?
13 feet
17 feet
21 feet
25 feet
P3173
Correct Answer: A

7. 6. Which one of the following is arranged from the lowest pressure to the highest pressure?
2 psig, 12 inches Hg absolute, 8 psia
2 psig, 18 inches Hg absolute, 8 psia
12 psia, 20 inches Hg absolute, 2 psig
12 psia, 30 inches Hg absolute, 2 psig
P2073
Correct Answer: D

8. A water storage tank is vented to atmosphere
A water storage tank is vented to atmosphere. The tank is located at sea level and contains 100,000 gallons of water at 80°F. A pressure gauge at the bottom of the tank reads 9.0 psig. What is the approximate water level in the tank?
13 feet
17 feet
21 feet
25 feet
P4537
Correct Answer: C

9. If a main steam line pressure gauge reads 900 psig, what is the absolute pressure?
870 psia
885 psia
915 psia
930 psia
P873
Correct Answer: C

10. Which one of the following is equivalent to 5 psia?
20 psig
10 psig
10 inches of mercury (Hg) vacuum
20 inches of mercury (Hg) vacuum
P1173
Correct Answer: D

11. 10. Condenser air inleakage has caused condenser vacuum to drop from 28 inches Hg to 26 inches Hg. What is the new absolute pressure in the condenser?
8 psia
6 psia
4 psia
2 psia
NEW Question
Correct Answer: D