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You’re welcome to pay attention to 1.
Single choice questions.
1.
Fire resistance and thermal insulation refers to the ability to prevent the temperature of the back fire surface from exceeding the specified value within a certain period of time when one side of the building partition member is exposed to fire under the standard fire resistance test conditions.
When the temperature rise of the back fire surface of the component occurs, the average temperature rise exceeds the initial average temperature_______ It is considered that the thermal insulation of the component is lost when the temperature is ℃.
A.68C.
180B.
140D.
220 click the blank space to check the answer B2.
For high-rise civil buildings with class I and II fire resistance rating, the fire resistance limit of their firewall shall not be lower than_______ h。 A.1C.
3B.
2D.
4 Click the blank space to check the answer C3.
The fire resistance limit of building components refers to the loss of building components, accessories or structures from the action of fire under the standard fire resistance test conditions_______ The time taken to end the hour.
A.
Bearing capacity and thermal insulation B.
bearing capacity or integrity or thermal insulation C.
thermal insulation or smoke resistance D.
bearing capacity and integrity and thermal insulation click the blank space to see the answer B4_______ It refers to the ability to prevent the penetration of flame and flue gas or the emergence of flame on the back fire surface within a certain period of time when one side of the building partition member is exposed to fire under the standard fire resistance test conditions.
A.
Fire resistance stability C.
fire resistance and thermal insulation B.
fire resistance integrity D.
fire resistance limit click the blank to check the answer B5.
The better the combustion performance of building materials, the more the fire resistance limit of components.
A.
High C.
uncertain B.
low D.
unchanged click on the blank space to view the answer B 2.
Multiple choice questions.
1.
The fire resistance limit of building components refers to the fire resistance of building components, fittings or structures from the time of fire to the time of loss under the standard fire resistance test conditions_______ The time taken to end the hour.
A.
Bearing capacity B.
integrity C.
smoke resistance D.
heat insulation E.
fire resistance click the blank to check the answer abd2 is usually used to check whether building components are lost_______ To judge whether the component reaches the fire resistance limit.
A.
Fire resistance stability B.
fire resistance performance C.
fire resistance integrity D.
fire resistance and heat insulation E.
smoke and fire resistance click the blank to check the answer acd3 the parameter determining that the component can continuously maintain its bearing capacity during the fire resistance test is the _____.
A.
Expansion amount B.
deformation amount C.
deformation rate D.
deflection E.
strength click the blank to check the answer bc4 the factors affecting the fire resistance of building components are the combustion performance of the material itself and _____.
A.
High temperature mechanical properties and thermal conductivity of materials B.
section size of building components C.
manufacturing method of components D.
manufacturing method between components E.
thickness of protective layer click the blank to view the answer abcde5 in order to improve the fire resistance limit of steel components, usually_______ Methods fire protection.
A.
Painting fireproof coating B.
coating non combustible materials C.
setting water curtain system D.
reducing the cross-sectional area of steel members E.
welding is used at the connection.
Click the blank to check the answer AB III.
judgment question.
1 the fire resistance of buildings depends on the combustion performance and fire resistance limit of building components.
() click the blank space to check the correct answer.
2 fire resistance limit refers to the time taken by building components, fittings or structures from the time they are affected by fire to the time they lose their bearing capacity, integrity or thermal insulation, expressed in hours (H).
() click the blank space to check the wrong answer, and there are gaps in the question stem.
Fire resistance limit refers to that under the standard fire resistance test conditions……
3 when the load-bearing separation member loses stability in the test, the member reaches its fire resistance limit.
() click the blank space to check the wrong answer.
When the component loses stability or integrity or thermal insulation in the test, the component reaches its fire resistance limit.
4.
Components composed of materials with better mechanical properties and thermal conductivity at high temperature have higher fire resistance limit; On the contrary, the fire resistance limit is low.
() click the blank space to check the wrong answer, and change “good thermal conductivity” into “poor thermal conductivity” in the title stem.
5 for members with the same stress conditions and composed of the same materials, the larger the section size is, the higher the fire resistance limit is.
() click the blank space to see if the answer is correct..
