Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
11 Cards in this Set
- Front
- Back
- 3rd side (hint)
|
Which one of the following describes the function of a safety valve?
A. Provide overpressure protection to limit the internal pressure in vessels B. Control pressure in a system to maintain optimum operational conditions C. Sound a warning by lifting at a predetermined value slightly higher than operating pressure D. Modulate open as necessary to maintain system pressure and/or temperature within normal limits |
ANSWER: A.
|
TOPIC: 191001
KNOWLEDGE: K1.01 [3.3/3.4] QID: P901 |
|
|
A vertical safety valve has a compressed spring assembly that is applying 1,200 lbf to the top of the valve disk in opposition to system pressure. System pressure is being exerted on the underside of the valve disk that is 3 inches in diameter. Which one of the following is the approximate system pressure at which the safety valve will open? (Ignore any effects from atmospheric pressure.)
A. 44 psi B. 64 psi C. 128 psi D. 170 psi |
ANSWER: D.
|
TOPIC: 191001
KNOWLEDGE: K1.01 [3.3/3.4] QID: P1802 (B1701) |
|
|
A vertical safety valve with a 3-inch diameter disk has a compressed spring applying 1,000 lbf to the top of the valve disk in opposition to system pressure. Which one of the following is the approximate system pressure at which the safety valve will open? (Neglect the effect of atmospheric pressure.)
A. 35 psi B. 111 psi C. 142 psi D. 444 psi |
ANSWER: C.
|
TOPIC: 191001
KNOWLEDGE: K1.01 [3.3/3.4] QID: P1903 (B2003) |
|
|
Refer to the drawing of a typical safety valve (see figure below). The component indicated by the solid arrow is used when necessary to manually...
A. rachet open the safety valve. B. pop open the safety valve. C. gag shut the safety valve. D. determine the position of the safety valve. Need to ADD picture from Question on Page 3 of 191001 |
ANSWER: B.
|
TOPIC: 191001
KNOWLEDGE: K1.01 [3.3/3.4] QID: P2101 (B2103) |
|
|
A vertical safety valve has a compressed spring assembly that is applying 2,500 lbf to the top of the valve disk in opposition to system pressure. System pressure is being exerted on the underside of the valve disk that is 5 inches in diameter. Which one of the following is the approximate system pressure at which the safety valve will open? (Neglect the effect of atmospheric pressure.)
A. 32 psi B. 127 psi C. 159 psi D. 500 psi |
ANSWER: B.
|
TOPIC: 191001
KNOWLEDGE: K1.01 [3.3/3.4] QID: P2301 (B2301) |
|
|
A vertical safety valve with a 2-inch diameter disk has a compressed spring applying 2,400 lbf to the top of the valve disk in opposition to system pressure. Which one of the following is the approximate system pressure at which the safety valve will open?
A. 95 psig B. 191 psig C. 382 psig D. 764 psig |
ANSWER: D.
|
TOPIC: 191001
KNOWLEDGE: K1.01 [3.3/3.4] QID: P2801 (B2803) |
|
|
Given the following pressure specifications for operation of a main steam safety valve (MSSV):
Setpoint pressure (MSSV starts to open): 1,200 psia Maximum pressure (MSSV will be fully open): 1,230 psia Reseat pressure (MSSV will be fully closed): 1,140 psia Which one of the following is the percent blowdown for the MSSV? A. 2.5 percent B. 5.0 percent C. 7.5 percent D. 10.0 percent |
ANSWER: B.
|
TOPIC: 191001
KNOWLEDGE: K1.01 [3.3/3.4] QID: P3401 (B3401) |
|
|
A completely full water storage tank is being hydrostatically tested to 100 psig using a positive displacement pump (PDP) with a smooth and constant discharge flow rate of 10 gpm. The tank is protected by a safety valve and a relief valve; both valves will discharge to the atmosphere. Each valve has an opening setpoint of 105 psig and a maximum rated discharge flow rate of 6 gpm. The PDP is inadvertently left running when tank pressure reaches 100 psig. With the PDP still running, tank pressure will stabilize _______ 105 psig; the greater mass flow rate will be coming from the _________ valve.
A. at; safety B. above; safety C. at; relief D. above; relief |
ANSWER: B.
|
TOPIC: 191001
KNOWLEDGE: K1.01 [3.3/3.4] K1.02 [3.0/3.3] QID: P4201 (B4201) |
|
|
Given the following pressure specifications for a safety relief valve (SRV):
Setpoint pressure (SRV will start to open): 1,200 psia Maximum pressure (SRV will be fully open): 1,242 psia Reseat pressure (SRV will be fully closed): 1,152 psia Which one of the following is the percent accumulation for the SRV? A. 2.5 percent B. 3.0 percent C. 3.5 percent D. 4.0 percent |
ANSWER: C.
|
TOPIC: 191001
KNOWLEDGE: K1.01 [3.3/3.4] QID: P4401 (B4401) |
|
|
A completely full water storage tank is being hydrostatically tested to 200 psig using a positive displacement pump (PDP) with a smooth and constant discharge flow rate of 8 gpm. The tank is protected by a relief valve and a safety valve; both valves discharge to the atmosphere. Each valve has an opening setpoint of 205 psig and a maximum rated discharge flow rate of 6 gpm. The PDP is inadvertently left running when tank pressure reaches 200 psig. With the PDP still running, when conditions stabilize the relief valve will be __________ open; and the safety valve will be discharging approximately _________ to atmosphere.
A. partially; 6 gpm B. partially; 2 gpm C. fully; 6 gpm D. fully; 2 gpm |
ANSWER: A.
|
TOPIC: 191001
KNOWLEDGE: K1.01 [3.3/3.4] K1.02 [3.0/3.3] QID: P4701 (B4701) |
|
|
LEFT OFF ON PAGE 7 of 191001
|
Left off on Page 7 of 191001
|
|
