Deck 11: Flows in Piping Systems

Question 1

The blade in Problem 3 is moving in the x-direction at 20 m/s. It is one of numerous blades on a rotor being energized by six jets each emitting water at 50 m/s. The entering blade angle is
The 45 $45 ^ { \circ }$ angle shown. If the six jets are oriented properly, the maximum power output of the
Rotor would be nearest:

A) 30 kW
B) 24 kW
C) 20 kW
D) 16 kW

Answer 1

16 kW

Question 2

$\text {Water flows over a 2-m-wide flat plate with}$$\text { the same velocities as in Problem 4 in the}$$\text { mini-exam for Section \(4.4\) where we found}$ $\text {\(\bar { v } = 0.0667 \mathrm {~m} / \mathrm { s }\). The frictional force \(F\) }$$\text {acting on the horizontal surface is nearest:}$
$F$ }\text {acting on the horizontal surface is nearest:} A) 250 N B) 1500 N C) 1700 N D) 1900 N " class="answers-bank-image d-block" loading="lazy" >

A) 250 N
B) 1500 N
C) 1700 N
D) 1900 N

Answer 2

1700 N

Question 3

$\text {If \(p _ { 1 } = 900 \mathrm { kPa }\), the force of the water on the}$$\text { nozzle is nearest:}$

A) 6910 N
B) 6470 N
C) 5120 N
D) 4920 N

Answer 3

5120 N

Question 4

$\text {Water, issuing from an 8-mm-diameter nozzle, impacts the blade}$ $\text {with a velocity \(V _ { 1 } = 50 \mathrm {~m} / \mathrm { s }\), as shown. The \(x\)-component of the }$$\text {force of the water on the blade is nearest}$ $x$ -component of the }\text {force of the water on the blade is nearest} A) 1300 N B) 200 N C) 150 N D) 100 N " class="answers-bank-image d-block" loading="lazy" >

A) 1300 N
B) 200 N
C) 150 N
D) 100 N