📌 صناعية مرحلة رابعة ( وزاري )
🟡 Chapter #MIXING
الملزمة-الموحدة 🟡
الملزمة-المترجمة 🟡
شرح1 د مصري🟡
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شرح2 د احمد هاشم 🟡
Or
🟡 3شرح د محمد البركي
اختبار_منقول 🟡
🟡 Mcq
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🟢 Chapter #MILLING
الملزمة-الموحدة 🟢
الملزمة-المترجمة 🟢
شرح1 🟢
Or
شرح2 🟢
اختبار_منقول 🟢
🟢Mcq
〰️〰️〰️〰️〰️〰️〰️
🔵Chapter #DRYING
الملزمة-الموحدة 🔵
الملزمة-المترجمة 🔵
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شرح2 🔵
اختبار_منقول 🔵
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🔴 اسئلة_وزاري_مقسمة_ع_المواضيع
🔴 دور-ثاني
🔴 اسئلة-المد-د.نوال
🟡 Chapter #MIXING
الملزمة-الموحدة 🟡
الملزمة-المترجمة 🟡
شرح1 د مصري🟡
Or
شرح2 د احمد هاشم 🟡
Or
🟡 3شرح د محمد البركي
اختبار_منقول 🟡
🟡 Mcq
〰️〰️〰️〰️〰️〰️〰️
🟢 Chapter #MILLING
الملزمة-الموحدة 🟢
الملزمة-المترجمة 🟢
شرح1 🟢
Or
شرح2 🟢
اختبار_منقول 🟢
🟢Mcq
〰️〰️〰️〰️〰️〰️〰️
🔵Chapter #DRYING
الملزمة-الموحدة 🔵
الملزمة-المترجمة 🔵
شرح1 🔵
Or
شرح2 🔵
اختبار_منقول 🔵
🔵 Mcq
〰️〰️〰️〰️〰️〰️〰️〰️〰️
🔴 اسئلة_وزاري_مقسمة_ع_المواضيع
🔴 دور-ثاني
🔴 اسئلة-المد-د.نوال
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صناعية
🟡mixing الموحدة غير مترجم
❤4
What is the primary mechanism responsible for mixing at the molecular level?
Anonymous Quiz
16%
a) Bulk Transport
5%
b) Turbulent Mixing
4%
c) Laminar Mixing
75%
d) Molecular Diffusion
❤3
What are the two primary components of a liquid mixing system?
Anonymous Quiz
88%
a) A tank or container and a means of supplying energy
3%
b) Baffles and vanes
8%
c) Impeller and air stream
2%
d) Ducts and a means of supplying power
❤4
When is batch mixing usually more feasible?
Anonymous Quiz
77%
a) When the material to be mixed is limited in volume
4%
b) When the material to be mixed is unlimited in volume
8%
c) When continuous mixing is preferred
11%
d) When the material to be mixed has high viscosity
❤2
Which three types of impellers are commonly used for batch mixing in liquid tanks?
Anonymous Quiz
94%
a) Propellers, turbines, and paddles
0%
b) Impellers, turbines, and vanes
5%
c) Impellers, propellers, and blades
1%
d) Blades, turbines, and paddles
❤2
What are the three components of flow patterns produced by impellers?
Anonymous Quiz
97%
a) Radial, axial, and tangential
2%
b) Vertical, horizontal, and diagonal
0%
c) Upward, downward, and circular
1%
d) Centrifugal, centripetal, and spiral
❤2
What is the primary effect of a propeller in mixing?
Anonymous Quiz
11%
a) Radial flow
78%
b) Axial flow
8%
b) Axial flow
3%
d) Turbulent flow
❤2
Which type of impellers are most efficient for mixing liquids with relatively low viscosity at
high speeds?
high speeds?
Anonymous Quiz
80%
a) Propellers
6%
b) Turbines
7%
c) Paddles
8%
d) Air Jets
❤1
When is a paddle impeller commonly used?
Anonymous Quiz
5%
a) For high-speed mixing
14%
b) For mixing low-viscosity liquids
76%
c) For mixing viscous liquids and semi-solids
5%
d) For generating axial flow
❤1
What is the primary circulation in a mixer with paddle impellers?
Anonymous Quiz
5%
a) Radial
9%
b) Axial
82%
c) Tangential
3%
d) Turbulent
❤1
What are the requirements for liquids to be mixed using air jet devices?
Anonymous Quiz
2%
a) High viscosity, foaming, reactive with the gas employed, and volatile
93%
b) Low viscosity, non-foaming, nonreactive with the gas employed, and reasonably nonvolatile
3%
c) High viscosity, non-foaming, reactive with the gas employed, and nonvolatile
2%
d) Low viscosity, foaming, nonreactive with the gas employed, and volatile
❤1
What is the purpose of using draft tubes in air jet mixing devices?
Anonymous Quiz
87%
a) To increase the efficiency of mixing by confining expanding bubbles and entrained liquids
7%
b) To generate tangential flow in the mixing vessel
3%
c) To reduce the power required for pumping liquids
3%
d) To increase the viscosity of the liquids being mixed
❤1
What is the similarity between fluid jets and propellers in their operation?
Anonymous Quiz
73%
a) Both generate turbulent flow axially
5%
b) Both generate radial flow
10%
c) Both generate tangential flow
12%
d) Both require high pressure for efficient mixing
❤2
How do fluid jets operate in mixing?
Anonymous Quiz
77%
a) By using high-pressure liquids pumped into a tank
5%
b) By using high-speed paddles
11%
c) By generating radial flow within the mixing vessel
7%
d) By using air or gas jets to lift liquids
❤2
What is the main advantage of continuous mixing?
Anonymous Quiz
9%
a) Suitable for small volumes of materials
75%
b) Produces an uninterrupted supply of freshly mixed material
9%
c) Requires high power input for mixing
7%
d) Creates a vortex in the mixing vessel
❤2
In continuous mixing systems, what devices can be used to ensure good mixing efficiency?
Anonymous Quiz
88%
a) Vanes, baffles, screws, and grids
5%
b) Turbines, propellers, paddles, and air jets
3%
c) Blades, impellers, jets, and paddles
4%
d) Vortex, draft tubes, fluid jets, and baffles
❤2
Why is careful control of the feed rate of raw materials important in continuous mixing
systems?
systems?
Anonymous Quiz
44%
a) To prevent vortex formation
39%
b) To ensure a mixture of uniform composition
6%
c) To reduce the power required for mixing
11%
d) To promote the formation of concentration gradients
❤2
Which of the following methods can be used to avoid vortex formation in mixing vessels?
Anonymous Quiz
89%
a) Changing the arrangement of the impeller
5%
b) Using only high-speed impellers
4%
c) Avoiding the use of baffles
2%
d) Encouraging tangential flow
❤1
What is the main characteristic of the Sigma-blade mixer's blades?
Anonymous Quiz
2%
a) They rotate at the same speed
98%
b) They counter-rotate with a speed ratio of about 2:1
1%
c) They move parallel to each other
0%
d) They rotate in the same direction
👍2❤1