Degarmo's Materials And Processes In Manufacturing
13th Edition
ISBN: 9781119492825
Author: Black, J. Temple, Kohser, Ronald A., Author.
Publisher: Wiley,
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Textbook Question
Chapter 14, Problem 17RQ
What is a muller, and what function does it perform?
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Experiment Data
Take the following data for the syringe injection pump
2/
Inner diameter of syringe barrel: D = 1.5 cm
Inner diameter of the needle shaft of the syringe: d = 0.5 mm
The thread pitch of lead screw: pt = 0.75 mm
Lead screw rotation velocity (rpm): n
Calculations
Liquid injection rate (cm³/hr) Q = pt*n* 60 * * D²/4
Velocity of liquid in syringe barrel (cm/min) v = 4Q/ (60** D²)
Velocity of liquid in syringe needle (cm/min) v₁ = 40/ (60* *d²)
K
Find the rotation velocity of lead screw n and the velocity of liquid in syringe needle if the
required injection dose is
1. 10 cm³ in 3 hours
(continuous injection)
2. 20 cm³ in 12 hours
(discontinuous injection, 5 cm³ each 3 hour, injection time = 1
min).
Discus the rece
Solution
Calculate the liquid injection rate
Q = P₁ xnx60x²
= 0.075xnx60xx1.5
= 7.94n-
cm³
hr
Calculate the velocity of liquid in barrel
V₁ ==
40
60xπx D²
4x7.94n
60xx1.5²
= 0.07ncm
hr
Calculate the velocity of liquid in needle
40
60xπxd²
4x7.94n
60xπx 0.05²
hr…
ducts are made in circular, rectangular or square shapes. From
[air movement, economical, low pressure duct, high velocity,
2. In HVAC-direct expansion system, the central package is divided to
[floor and ceiling.
floor and roof standing,
roof top and vertical,
3. -------
fair vapor pressure,
is load from outdoor surrounding.
appliances, miscellaneous sources, metabolism,
-
none of any one]
4. The magnitude of time lag depends on the materials used to construct the particular wall or
roof, and on their capacity to
[space load, condition space,
ambient conditions, store heat,
none of any one]
5. If the cooling load 5 Ton, outdoor temperature in the catalogue
temperature = 48 °C, the actual cooling load equal -
[50000 BTU/hr, 55000 BTU/hr, 72000 BTU/hr,
27000 BTU/hr,
………….
-point of view.
none of any one]
-
VRF and CCD]
40 °C, actual outdoor
none of any one]
/ The following particulars refer to a two-row velocity-compounded impulse wheel which forms the first stage of a combination turbine: Steam velocity at nozzle outlet 1630 mis Mean blade velocity 1125 mls Nozzle angle :16° Outlet angle, first row of moving blades 18 Outlet angle, fixed guide blades inr Outlet angle, second row of moving blades :36° Steam flow rate 126kgs “The ratio of the relative velocity at outlet to that at inlet is 0.84 for all the blade. Determine @) The velocity of whirl.
Chapter 14 Solutions
Degarmo's Materials And Processes In Manufacturing
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