API-571無料問題集「API Corrosion and Materials Professional」

質問 1

With sour water corrosion, at a given pressure, the H(2)S concentration in the sour water _________ as temperatures ________.

（A）Decreases, decreases

（B）Decreases, increases

（C）Increases, decreases

（D）Increases, increases

正解：B 解答を投票する

質問 2

Alloy 400 is susceptible to LME when it comes in contact with molten ________.

（A）Zinc

（B）Lead

（C）Mercury

（D）Cadmium

正解：C 解答を投票する

質問 3

Fatigue cracks usually initiate on the surface at notches or __________ under cyclic
loading.

（A）Laterals

（B）Branches

（C）Stress concentrations

（D）Grinding marks

正解：C 解答を投票する

質問 4

Changing to a more corrosion resistant and/or higher hardness material _________ improve cavitation resistance.

（A）Will

（B）May

（C）May not

（D）Will not

正解：C 解答を投票する

質問 5

With sour water corrosion, streams with a pH below ________ indicate the presence of a strong acid.

（A）5.5

（B）4.5

（C）7.0

（D）6.0

正解：B 解答を投票する

質問 6

Hydrogen blisters may form at many different depths from the surface of the steel, in the middle of the plate or near a weld. In some cases, neighboring or adjacent blisters that are at slightly different depths (planes) may develop cracks that link them together.
Interconnecting cracks between the blisters often have a __________ appearance.

（A）Eyebrow

（B）Step like

（C）Crescent

（D）Jagged

正解：B 解答を投票する

質問 7

Cracking of a metal due to stress relaxation during PWHT or in service at elevated temperatures is called ______. It is most often found in heavy wall sections.

（A）None of the above

（B）Step-like cracking

（C）Reheat cracking

（D）Thermal cracking

正解：C 解答を投票する

質問 8

Caustic stress corrosion cracking typically propagates _______ to the weld in adjacent base metal but can occur in the weld deposit or heat affected zone.

（A）Perpendicular

（B）Across

（C）Parallel

（D）Transverse

正解：C 解答を投票する

質問 9

The graphitization rate ____________ with increasing temperature

（A）Increases

（B）Proceeds

（C）Stops

（D）Decreases

正解：A 解答を投票する

質問 10

Oxidation of carbon steel begins to become significant above _________.

（A）900(o) F

（B）800(o) F

（C）1100(o) F

（D）1000(o) F

正解：D 解答を投票する

質問 11

_________ is a form of carburization resulting in accelerated localized pitting which occurs in carburizing gases and/or process streams containing carbon and hydrogen. Pits usually form on the surface and may contain soot or graphite dust.

（A）Carbide corrosion

（B）Hydrate corrosion

（C）Metal dusting

（D）Spheroidization

正解：C 解答を投票する

質問 12

Corrosion in boiler feedwater and condensate return systems is usually the result of dissolved gases, oxygen and ________.

（A）Carbon dioxide

（B）Material properties

（C）H(2)S

（D）Carbon monoxide

正解：A 解答を投票する

質問 13

What is the chemical symbol for propane or propylene?

（A）C(2)

（B）CH4

（C）C3

（D）C4

正解：C 解答を投票する

API-571 無料問題集「API Corrosion and Materials Professional」

弊社を連絡する

関連リンク

トップ試験