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Zina [86]
3 years ago
11

Which of the following does NOT describe product design.

Engineering
1 answer:
Andrew [12]3 years ago
6 0

Question:

Which of the following does NOT describe product design for maximum supply chain flexibility?

A. Create an increased number of modular products with fewer components.

B. Complete product assembly as close to receipt of actual orders as possible.

C. Reengineer products to use the same components.

D. Create many products variations.

Answer:

The correct option is;

D. Create many products variations

Explanation:

The options are analysed as follows

A. Create an increased number of modular products with fewer components.

Modularity increases the utilization of components such that manufacturers can create a wide variety of possible products that increases costumer satisfaction while maintaining utilization convenience  

B. Complete product assembly as close to receipt of actual orders as possible.

Here we have requirement for improved supply chain flexibility as such improving raw material utilization rate and overall manufacturing efficiency

C. Reengineer products to use the same components.

Here we have increasing modularization which improves design flexibility and manufacturing comparative advantage

D. Create many products variations.

The above creates many varying components which increases the number of components to be assembled into products hence it does not describe product design for maximum supply chain flexibility.

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The textile industry has seen steady growth in the United States.<br> O True<br> O False
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Answer:

true

Explanation:

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Use the map to complete the table by selecting the boxes that best describe how ocean currents affect the
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Western coast is frequented by the cold californian current which reduces the temperature.

Southern Alaskan coast is frequented by Warm Alaskan current which increases the temeprature of the coast.

Eastern coast is frequented by Warm Gulf Stream which increases the temperature of the coast.

Explanation:

Oceanic current (Gulf stream) increases the temperature of the coastal region along the Eastern Coast of the US mainland.  Gulf stream represents the system of warm oceanic current. This current causes excessive hot conditions in the US mainland.

West Coast of the US is frequented by Cold Californian current and warm Alaskan current. Hence, the Californian current decreases the temperature of the western coast of the US and cause atmospheric stability in the region.

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4 0
3 years ago
A) Consider an air standard otto cycle that has a heat addition of 2800 kJ/kg of air, a compression ratio of 8 and a pressure an
Angelina_Jolie [31]

Answer:

a) i) The maximum pressure is approximately 122.37 bar

ii) The thermal efficiency is approximately 56.47%

iii) The mean effective pressure is approximately 20.974 bar

b) (b) Four types of internal combustion engine includes;

1) The diesel engine

2) The Otto engine

3) The Brayton engine

4) The Wankel engine

Explanation:

The parameters of the Otto cycle are;

The heat added, Q_{in} = 2,800 kJ/kg

The compression ratio, r = 8

The beginning compression pressure, P₁ = 1 bar

The beginning compression temperature, T₁ = 300 K

Cp = 1.005 kJ/kg·K

Cv = 0.718 kJ/kg·K

R = 287 kJ/kg·K

K = Cp/Cv = 1.005 kJ/kg·K/(0.718 kJ/kg·K) ≈ 1.4

T₂ = T₁×r^(k - 1)

∴ T₂ = 300 K×8^(1.4 - 1) ≈ 689.219 K

\dfrac{P_1\cdot V_1}{T_1}  = \dfrac{P_2\cdot V_2}{T_2}

P_2 = \dfrac{P_1\cdot V_1 \cdot T_2}{T_1 \cdot V_2}  = \dfrac{V_1}{V_2} \cdot  \dfrac{P_1 \cdot T_2}{T_1 } = r \cdot  \dfrac{P_1 \cdot T_2}{T_1 }

∴ P₂ = 8 × 1 bar × (689.219K)/300 K ≈ 18.379 bar

Q_{in} = m·Cv·(T₃ - T₂)

∴ Q_{in} = 2,800 ≈ 0.718 × (T₃ - 689.219)

T₃ = 2,800/0.718 + 689.219 = 4588.94 K

P₃ = P₂ × (T₃/T₂)

P₃ = 18.379 bar × 4588.94K/(689.219 K) = 122.37 bar

The maximum pressure = P₃ ≈ 122.37 bar

(ii) The thermal efficiency, \eta_{Otto}, is given as follows;

\eta_{Otto} = 1 - \dfrac{1}{r^{k - 1}}

Therefore, we have;

\eta_{Otto} = 1 - \dfrac{1}{8^{1.4 - 1}} \approx 0.5647

The thermal efficiency, \eta_{Otto} ≈ 0.5647

Therefore, the thermal efficiency ≈ 56.47%

(iii) The mean effective pressure, MEP is given as follows;

MEP = \dfrac{\left(P_3 - P_1 \cdot r^k \right) \cdot \left(1 - \dfrac{1}{r^{k-1}} \right)}{(k -1)\cdot (r - 1)}

Therefore, we get;

MEP = \dfrac{\left(122.37 - 1 \times 8^{1.4} \right) \cdot \left(1 - \dfrac{1}{8^{1.4-1}} \right)}{(1.4 -1)\cdot (8 - 1)} \approx 20.974

The mean effective pressure, MEP ≈ 20.974 bar

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1) The diesel engine; Compression heating is the source of the ignition, with constant pressure combustion

2) The Otto engine which is the internal combustion engine found in cars that make use of gasoline as the source of fuel

The Otto engine cycle comprises of five steps; intake, compression, ignition, expansion and exhaust

3) The Brayton engine works on the principle of the steam turbine

4) The Wankel it follows the pattern of the Otto cycle but it does not have piston strokes

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