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A 4.2 K-factor sprinkler must deliver 17 gpm (692 mm/min). What pressure is required?
Suggested Answer: B
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To deliver 17 gpm with a 4.2 K-factor sprinkler, approximately 9.22 psi pressure is required. This is calculated using the sprinkler's K-factor formula, which relates flow rate, pressure, and the K-factor.
35 comments · newest first
ZE
Zena
10 months ago
How do we know the K-factor is accurate?
DA
Daniela
11 months ago
I agree with C, seems like the right pressure for 17 gpm.
HA
Hannah
11 months ago
Wait, 36.86 psi seems way too high for that flow rate!
TA
Tamra
11 months ago
I think it's definitely option C.
BA
Basilia
11 months ago
The K-factor is key for calculating pressure!
HU
Hubert
12 months ago
I feel like I should be able to solve this, but the numbers are throwing me off. I might just guess and go with option B since it seems reasonable.
OR
Orville
12 months ago
I vaguely recall that the formula involves multiplying the K-factor by the square of the flow rate. I hope I remember it correctly for this question!
NG
Nguyet
12 months ago
I think I practiced a similar question where we had to find pressure based on flow rate and K-factor. I might be leaning towards option C, but I’m not completely confident.
SH
Shenika
1 year ago
I remember something about the K-factor and how it relates to flow rate, but I'm not sure how to calculate the pressure needed.
CH
Charlette
1 year ago
This seems like a standard sprinkler system pressure calculation. I'm confident I can work through this step-by-step and arrive at the right answer.
VE
Vernice
1 year ago
Wait, what units are we working in? I want to make sure I convert everything properly before trying to solve this.
KE
Keith
1 year ago
Okay, I think I've got this. I just need to plug in the given values and solve for the pressure. Shouldn't be too difficult.
LE
Leslie
1 year ago
Hmm, I'm a bit unsure about this one. I'll need to review the K-factor formula and make sure I'm applying it correctly.
BU
Bulah
1 year ago
This looks like a straightforward hydraulics problem. I'll need to use the K-factor formula to solve for the required pressure.
FE
Fernanda
2 years ago
A) 4.52 psi (0.31 bar) is the way to go. I can already feel the water pressure coursing through my veins. Bring on the next question!
SH
Sheridan
2 years ago
D) 36.86 psi (2.54 bar) would have been way too high for this scenario.
BE
Bettina
2 years ago
C) 16.38 psi (1.13 bar) seemed like a reasonable choice to me.
RE
Reyes
2 years ago
I think it's important to calculate the pressure accurately for sprinkler systems.
JA
Jaime
2 years ago
I agree, 4.52 psi (0.31 bar) is the correct pressure.
GE
Georgene
2 years ago
B) I thought it was 9.22 psi (0.63 bar), but I guess I was wrong.
AR
Aracelis
2 years ago
A) 4.52 psi (0.31 bar) is the correct answer. Good job!
CE
Cecily
2 years ago
Hmm, I'm gonna go with D) 36.86 psi (2.54 bar). Bigger is better, right? Just like my ego after acing this exam.
MA
Mattie
2 years ago
Josefa: I guess we'll find out soon enough.
MI
Michel
2 years ago
User 3: D) 36.86 psi (2.54 bar) seems like the right choice.
JO
Josefa
2 years ago
User 2: I'm going with A) 4.52 psi (0.31 bar).
NI
Nichelle
2 years ago
User 1: I think the answer is C) 16.38 psi (1.13 bar).
JU
Justine
2 years ago
I'm not sure, but I think I'll go with D) 36.86 psi (2.54 bar)
BR
Brande
2 years ago
I agree with Paris, because the formula for pressure is flow rate divided by K-factor
GO
Golda
2 years ago
I think B) 9.22 psi (0.63 bar) is the right answer. Gotta love these sprinkler questions, they really get the blood flowing!
YU
Yuriko
2 years ago
C) 16.38 psi (1.13 bar) seems like the correct answer. The K-factor and flow rate are given, so we can plug those into the formula to solve for the pressure.
BA
Barney
2 years ago
Looks like option C is the correct answer then.
DE
Devon
2 years ago
That would give us 16.38 psi, which matches option C.
LA
Lavonne
2 years ago
So, for this problem, it would be 4.2 multiplied by the square root of 17.
IL
Ilene
2 years ago
I think the formula to calculate pressure is K-factor multiplied by the square root of the flow rate.
PA
Paris
2 years ago
I think the answer is C) 16.38 psi (1.13 bar)