40.鋼質商船的AC主配電盤，若發生各相間負荷不平衡時，則按CR驗船協會規定，應不能超過多少電流？ (A)滿載之15% (B)尖峰之9% (C)滿載之12% (D)尖峰之7%

40.鋼質商船的AC主配電盤，若發生各相間負荷不平衡時，則按CR驗船協會規定，應不能超過多少電流？
(A)滿載之15%
(B)尖峰之9%
(C)滿載之12%
(D)尖峰之7%

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統計： A(317), B(30), C(75), D(33), E(0) #787825

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B1 · 2024/02/29

#6036489

按驗船協會規範要求:（1）鋼質商船的AC...

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9.Blowers are used with many diesel engines to supply the air necessary for combustion to the engine’s cylinders. When the pressure of this air is increased above atmospheric pressure, referred to as supercharging, the power output of engine is increased. In addition, in a two-stroke engine the air supplied by the blower helps to purge the engine’s cylinders of exhaust gas. This is referred to as scavenging. Based on these descriptions, please specify the correct statement. (A)The scavenging and supercharging processes share identical purpose of increasing the static pressure in the intake pipes. (B)The use of blow for scavenging and supercharging is due to its characteristics of high-pressure and low volumetric flow rate. (C)The blower for marine application is always the centrifugal type as it offers the high speed characteristic. (D)The scavenging in a two-stroke engine assists to purge the engine’s exhaust gas which has beneficial effect for combustion.

40.鋼質商船的AC主配電盤，若發生各相間負荷不平衡時，則按CR驗船協會規定，應不能超過多少電流？
(A)滿載之15%
(B)尖峰之9%
(C)滿載之12%
(D)尖峰之7%

詳解 (共 1 筆)

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40.鋼質商船的AC主配電盤，若發生各相間負荷不平衡時，則按CR驗船協會規定，應不能超過多少電 流？ (A)滿載之15% (B)尖峰之9% (C)滿載之12% (D)尖峰之7%

詳解 (共 1 筆)

相關試題

相關試卷

40.鋼質商船的AC主配電盤，若發生各相間負荷不平衡時，則按CR驗船協會規定，應不能超過多少電流？
(A)滿載之15%
(B)尖峰之9%
(C)滿載之12%
(D)尖峰之7%