Understanding Motor Controls
3rd Edition
ISBN: 9781305498129
Author: Stephen L. Herman
Publisher: Cengage Learning
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Chapter 22, Problem 4RQ
What is the disadvantage of wiring components to a terminal strip?
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: +0
العنوان
solle
не
Am
4
A pump draws water through a 300-mm diameter cast iron pipe, 15m long from a reservoir
in which the water surface is 4.5 m higher than the pump and discharges through a 250-
mm diameter cast iron, 75 m long, to an elevated tank in which the water surface is 60 m
higher than the pump. Q=0.25 m³/s. Considering f-0.02 and the coefficients for minor
head losses (k entrance 0.5, k bend 0.35, and K exit -0.5), compute the power of the pump.
۳/۱
۲/۱
4.5 m
Kentrance
300 mm dia.
15 m Length
250 mm dia.
75 m Length
kpend
kexit
60 m
ostlar
A 100 m length of a smooth horizontal pipe is attached to a large reservoir. A
attached to the end of the pipe
to pump water into the
reservoir at a volume flow rate
of 0.01 m³/s. What pressure
(gage) must the pump produce
at the pipe to generate this
flow rate? The inside diameter
of the smooth pipe is 150mm.
Dynamic Viscosity of water is
1*103 Kg/(m.s). K at the exit
of the pipe is 1.
pump
10 m
D=150mm
L= 100 m-
Pump
: +0
العنوان
solle
не
A
4
A numn drawe water through 200
۳/۱
۲/۱
A heavy car plunges into a lake during an accident and lands at the bottom of the lake
on its wheels as shown in figure. The door is 1.2 m high and 1 m wide, and the top edge of
the door is 8 m below the free surface of the water. Determine the hydrostatic force on the
door if it is located at the center of the door, and discuss if the driver can open the door, if
not; suggest a way for him to open it. Assume a strong person can lift 100 kg, the passenger
cabin is well-sealed so that no water leaks inside. The door can be approximated as a
vertical rectangular plate.
8 m
E
✓
Lake
Chapter 22 Solutions
Understanding Motor Controls
Ch. 22 - Prob. 1RQCh. 22 - When connecting a control system, what should be...Ch. 22 - What should be done to each component to help...Ch. 22 - What is the disadvantage of wiring components to a...Ch. 22 - What is the main advantage of making connections...Ch. 22 - Refer to the circuit shown in Figure 221. Should...Ch. 22 - What does the dashed line between the two float...
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- Two concentric plain helical springs of the same length are wound out of the samewire circular in cross section and supports a compressive load P. The inner springmean diameter 200 mm. Calculate the maximum stress induced in the spring if theconsists of 20 turns of mean dimeter 160 mm and the outer spring has 18 turns ofdiameter of wire is equal to 10 mm and Pis equal to 1000 N. (Take Ks=1)arrow_forwardt 1+2\xi pu +962гz P 1 A heavy car plunges into a lake during an accident and lands at the bottom of the lake on its wheels as shown in figure. The door is 1.2 m high and I m wide, and the top edge of the door is 8 m below the free surface of the water. Determine the hydrostatic force on the door if it is located at the center of the door, and discuss if the driver can open the door, if not; suggest a way for him to open it. Assume a strong person can lift 100 kg, the passenger cabin is well-sealed so that no water leaks inside. The door can be approximated as a vertical rectangular plate. 加 8 m 1.2 m Lake -20125 DI 750 x2.01 5 P 165 Xarrow_forward11. If Sin(x+α) = 2Cos(x-a); prove that: tan x= 2- tana 1-2 tanaarrow_forward
- 12. If Sin(x-a)= Cos(x+α); prove that: tan x=1.arrow_forward: +0 العنوان solle не A 4 A numn drawe water through 200 ۳/۱ ۲/۱ A heavy car plunges into a lake during an accident and lands at the bottom of the lake on its wheels as shown in figure. The door is 1.2 m high and 1 m wide, and the top edge of the door is 8 m below the free surface of the water. Determine the hydrostatic force on the door if it is located at the center of the door, and discuss if the driver can open the door, if not; suggest a way for him to open it. Assume a strong person can lift 100 kg, the passenger cabin is well-sealed so that no water leaks inside. The door can be approximated as a vertical rectangular plate. 8 m E ✓ Lakearrow_forward۲/۱ - | العنوان A heavy car plunges into a lake during an accident and lands at the bottom of the lake on its wheels as shown in figure. The door 1.2 m high and 1 m wide, and the top edge of the door is 8 m below the free surface of the water. Determine the hydrostatic force on the door if it is located at the center of the door, and discuss if the driver can open the door, if not; suggest a way for him to open it. Assume a strong person can lift 100 kg, the passenger cabin is well-sealed so that no water leaks inside. The door can be approximated as a vertical rectangular plate. 8 m Lakearrow_forward
- - | A pump draws water through a 300-mm diameter cast iron pipe, 15m long from a reservoir in which the water surface is 4.5 m higher than the pump and discharges through a 250- mm diameter cast iron, 75 m long, to an elevated tank in which the water surface is 60 m higher than the pump. Q-0.25 m³/s. Considering f- 0.02 and the coefficients for minor head losses (k entrance 0.5, k bend 0.35, and K exit -0.5), compute the power of the pump. Kexit 250 mm dia 75 m Length 60 m العنوان 300 mm dia. 15 m Length -UZ kentrance 11421 Kpend osthor oster ۲/۱arrow_forwardA heavy car plunges into a lake during an accident and lands at the bottom of the lake on its wheels as shown in figure. The door is 1.2 m high and 1 m wide, and the top edge of the door is 8 m below the free surface of the water. Determine the hydrostatic force on the door if it is located at the center of the door, and discuss if the driver can open the door, if not; suggest a way for him to open it. Assume a strong person can lift 100 kg, the passenger cabin is well-sealed so that no water leaks inside. The door can be approximated as a vertical rectangular plate. 8 m m Lakearrow_forward۲/۱ A pump draws water through a 300-mm diameter cast iron pipe, 15m long from a reservoir in which the water surface is 4.5 m higher than the pump and discharges through a 250- mm diameter cast iron, 75 m long, to an elevated tank in which the water surface is 60 m higher than the pump. Q = 0.25 m³/s. Considering f= 0.02 and the coefficients for minor head losses (k entrance = 0.5, k hend 0.35, and K exit -0.5), compute the power of the pump. 4.5 m 300 mm dia. 15 m Length 250 mm dia. 75 m Length kentrance kexit 60 m kbend ostherarrow_forward
- A pump draws water through a 300-mm diameter cast iron pipe, 15m long from a reservoir in which the water surface is 4.5 m higher than the pump and discharges through a 250- mm diameter cast iron, 75 m long, to an elevated tank in which the water surface is 60 m higher than the pump. Q = 0.25 m³/s. Considering f= 0.02 and the coefficients for minor head losses (k entrance = 0.5, k hend = 0.35, and K exit 0.5), compute the power of the pump. = 4.5 m 300 mm dia. 15 m Length 250 mm dia. 75 m Length Kentrance kexit 60 m kbendarrow_forwardA pump draws water through a 300-mm diameter cast iron pipe, 15m long from a reservoir in which the water surface is 4.5 m higher than the pump and discharges through a 250- mm diameter cast iron, 75 m long, to an elevated tank in which the water surface is 60 m higher than the pump. Q = 0.25 m³/s. Considering f= 0.02 and the coefficients for minor head losses (k entrance = 0.5, k hend = 0.35, and K exit 0.5), compute the power of the pump. = 4.5 m 300 mm dia. 15 m Length 250 mm dia. 75 m Length Kentrance kexit 60 m kbendarrow_forward4. Give the dimensions completely of the following figure?arrow_forward
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