NRC BWR GFES - Thermodynamic Units & Properties

Refer to the drawing of a differential pressure manometer (see figure below). A differential pressure manometer filled with water is installed across an orifice in a ventilation duct to determine the direction of airflow. With the ventilation conditions as shown, the pressure at P1 is __________ than P2, and airflow is __________. A. greater; left to right B. greater; right to left C. less; left to right D. less; right to left

Refer to the drawing of two water storage tanks with four differential pressure level detectors (see figure below). The tanks are identical and are being maintained at 17 psia and the same constant water level. They are surrounded by atmospheric pressure. Which one of the level detectors is sensing the greatest D/P? A. No. 4 B. No. 3 C. No. 2 D. No. 1

Refer to the drawing of a differential pressure manometer in a ventilation duct (see figure below). P1 and P2 are pressures sensed in the ventilation duct. With the conditions shown, P1 is __________ than P2; and airflow is to the __________. A. less; left B. less; right C. greater; left D. greater; right

Refer to the drawing of two water storage tanks with four differential pressure level detectors (see figure below). The tanks are identical and being maintained at 30 psia with a water level of 20 feet. They are surrounded by standard atmospheric pressure. The water temperatures in the tanks and reference legs are the same. If each detector experiences a ruptured diaphragm, which detector(s) will cause indicated tank level to decrease? (Assume actual tank water level remains constant.) A. No. 1 only B. No. 2 only C. No. 1, 2, and 3 D. No. 2, 3, and 4

Refer to the drawing of two water storage tanks with four differential pressure level detectors (see figure below). The tanks are identical and are currently at 2 psig overpressure, the same constant water level, and a temperature of 60F. They are surrounded by atmospheric pressure. All level detectors have been calibrated and are producing the same level indication. If a leak in the top of each tank causes a complete loss of overpressure, which level detector(s) will produce the lowest level indication? A. No. 1 only B. No. 2 only C. No. 1 and 4 D. No. 2 and 3

An enclosed water storage tank is pressurized with nitrogen to prevent air inleakage. A differential pressure detector with a dry reference leg is used to measure the tank level. To achieve the greatest accuracy of measurement, the low pressure side of the detector should sense which one of the following? A. The pressure at the bottom of the tank. B. The pressure of the atmosphere surrounding the tank. C. The pressure of a column of water external to the tank. D. The pressure of the gas space at the top of the tank.

Refer to the drawing of two water storage tanks with four differential pressure level detectors (see figure below). The tanks are identical and they are presently at 2 psig overpressure, 60F, and the same constant water level. They are located within a sealed containment structure that is being maintained at atmospheric pressure. All level detectors have been calibrated and are producing the same level indication. If a ventilation malfunction causes containment structure pressure to decrease to 12 psia, which level detectors will produce the lowest level indication? A. 1 and 3 B. 2 and 4 C. 1 and 4 D. 2 and 3

Refer to the drawing of two water storage tanks with four differential pressure level detectors (see figure below). The tanks are identical and are presently at 2 psig overpressure, 60F, and the same constant water level. They are located within a sealed containment structure that is being maintained at atmospheric pressure. All level detectors have been calibrated and are producing the same level indication. If a ventilation malfunction causes the containment structure pressure to decrease to 13 psia, which level detectors will produce the highest indication? A. 1 and 2 B. 3 and 4 C. 1 and 4 D. 2 and 3

Refer to the drawing of two water storage tanks with four differential pressure level detectors (see figure below). The tanks are identical and are being maintained at 30 psia and a water level of 20 feet. They are surrounded by standard atmospheric pressure. The water in the tanks and reference legs is at 70EF. If each detector experiences a ruptured diaphragm, which detector(s) will cause indicated tank level to increase? (Assume actual tank water level remains constant.) A. No. 1 only B. No. 2 only C. No. 1 and 3 D. No. 2 and 4

A water storage tank is vented to atmosphere. The tank is located at sea level and contains 100,000 gallons of 80EF water. A pressure gauge at the bottom of the tank reads 5.6 psig. What is the approximate water level in the tank? A. 13 feet B. 17 feet C. 21 feet D. 25 feet

Refer to the drawing of a tank with a differential pressure (D/P) level detector (see figure below). If the tank contains 30 feet of water at 60EF, what is the approximate D/P sensed by the detector? A. 7 psid B. 13 psid C. 20 psid D. 28 psid

A water storage tank is vented to atmosphere. The tank is located at sea level and contains 100,000 gallons of water at 80EF. A pressure gauge at the bottom of the tank reads 7.3 psig. What is the approximate water level in the tank? A. 13 feet B. 17 feet C. 21 feet D. 25 feet

A water storage tank is vented to atmosphere. The tank is located at sea level and contains 100,000 gallons of water at 80EF. A pressure gauge at the bottom of the tank reads 9.0 psig. What is the water level in the tank? A. 13 feet B. 17 feet C. 21 feet D. 25 feet

Refer to the drawing of two water storage tanks with four differential pressure level detectors (see figure below). The tanks are identical and are presently at 2 psig overpressure, the same constant water level, and a temperature of 60EF. They are surrounded by atmospheric pressure. All level detectors have been calibrated and are producing the same level indication. A leak in the top of each tank causes a complete loss of overpressure in both tanks. Which level detector(s) will produce the highest level indication? A. No. 1 only B. No. 2 only C. No. 1 and 4 D. No. 2 and 3

Refer to the drawing of a water storage tank with a differential pressure (D/P) level indicator that is vented to atmosphere (see figure below). Both the tank and the level indicator are surrounded by standard atmospheric pressure. Tank water temperature is 70EF. The D/P level indicator is sensing a differential pressure of 4.0 psi. What is the water level in the tank above the instrument penetration? A. 9.2 feet B. 16.7 feet C. 24.7 feet D. 43.2 feet