1, which produces enough flammable vapor on the surface of liquid (solid), and can produce flame burning phenomenon when it meets fire, which is called (b).
A, flash point b, flash point c, ignition point d, deflagration
2. Under the specified test conditions, the lowest temperature at which liquid or solid can burn continuously is called (D).
A, spontaneous combustion point b, flash point c, spontaneous combustion point d, ignition point
3. The boiling point is (A)℃
a、 100B、 150C、200D、250
4. The explosion caused by the chemical reaction of the substance itself, which produces a lot of gas and high temperature, is called (B).
A, physical explosion b, chemical explosion c, dust explosion d, nuclear explosion
5. smoldering is the combustion characteristic of (a).
A, solid b, liquid c, gas d, solid, liquid and gas
6. Flash point (b) for generating and storing liquids with Class A fire hazard.
a、gt； 28℃B 、& lt28℃ C、≥28℃D、≤28℃
7. The lower explosion limit for the production and storage of gases with Class A fire hazard is (C).
a、≤ 10% B、≥ 10% C 、& lt 10% D 、>; 10%
8. Carbon dioxide fire extinguishing agent mainly relies on (b) to extinguish the fire.
A, reduce the temperature b, reduce the oxygen concentration c, reduce the ignition point d, reduce the combustible.
9. The main mechanism of dry powder fire extinguishing agent is (C).
A, lowering oxygen concentration b, lowering temperature c, chemically inhibiting d, lowering oxygen concentration and cooling.
10. The main mechanism of foam extinguishing agent is (a).
A, cooling, suffocating b, inhibiting combustion chain reaction c, reducing oxygen concentration d and temperature.
1 1. The smaller the diameter of the container filled with explosive gas mixture, the greater the explosion limit (A).
A the smaller the range between the upper limit and the lower limit, the larger the range between the upper limit and the lower limit.
C, the higher the upper limit, the lower the lower limit.
12. In the absence of an external ignition source, the internal process of (d) generates heat, which causes the temperature to rise. This spontaneous combustion phenomenon is called spontaneous combustion.
A, physics, chemistry b, chemistry, biology
C, physics, biology d, biology, physics, chemistry
13. Thermal radiation transfers heat in the form of (b).
A, light wave b, electromagnetic wave c, medium flow d, object contact
14. The exothermic reaction between combustible and oxidant is usually accompanied by the phenomenon of (D), which is called combustion.
A, flame, glow b, glow, smoke
C, flame, smoke d, flame, luminescence and/or smoke.
15. The solid combustible substance must pass (b), and the concentration of combustible gas above the solid reaches the combustion limit before continuous combustion can occur.
A, heating, ventilation and evaporation b, heating, evaporation and thermal decomposition
C, heating, thermal decomposition d, thermal decomposition and evaporation.
16. In the combustion process of liquid, it is not the liquid itself that is burning, but the liquid is heated and evaporated into steam. The steam will be heated before the occurrence of (a) and then burned when the temperature reaches the self-ignition point.
A, thermal decomposition, oxidation B, fission C, chain initiation D, chain transfer
17. Building components are not easy to catch fire when exposed to open fire in the air or under the action of high temperature, and the combustion stops immediately after the fire source is removed, so this component is (b).
A, incombustible b, incombustible c, combustible d, combustible
18. In the process of fire, (a) is the main factor causing the upward spread of smoke.
A, stack effect B, fire wind pressure C, hole spread D, horizontal spread
19. In the fire, the stressed steel members without fire protection are easy to deform at high temperature. When the temperature rises to 300℃, the strength of steel begins to decrease gradually, and usually after (a), the structure will collapse.
A,15 ~ 30min b, 30 ~ 60min c, 1h d, 2h.
20. Combustion is an exothermic luminescence (A).
A, chemical reaction b, physical reaction c, photoelectric reaction d, decomposition reaction
2 1. In an indoor fire, the transient state in which all combustible surfaces participate in combustion is called (C).
A, explosion b, deflagration c, flash d, tempering
22. Which of the following storage tank combustion may lead to boiling overflow and splash? (4)
A, gasoline b, kerosene c, diesel d, crude oil
23. The doors of the smoke-proof stairwell and front room should be (B).
A, Class A fire doors B, Class B fire doors C and Class C fire doors
D, fire resistance limit of not less than 3h fire shutter
24. Enriched water column refers to the jet length from the nozzle of the water gun to the point where 90% of the water in the jet passes through a circular hole with a diameter of (b).
a、750px B、950px C、975px D、 1025px
25. Unless otherwise specified in the specification, the fire damper is installed on the pipeline of ventilation and air conditioning system, and the suitable working temperature is (B).
A.280℃ B.70℃ C.72℃ D.220℃
26. The smoke exhaust fire damper is installed on the pipeline of the smoke exhaust system, and its working temperature is (C).
A.72℃ B.70℃ C.280℃ D.220℃
27. The fire damper is installed on the air supply and return duct of the ventilation and air conditioning system, which is normally open, and closed when the gas temperature in the pipeline reaches (A) C in case of fire.
a、70 B、80 C、90 D、 120
28. The smoke exhaust fire damper is a valve installed on the pipeline of the smoke exhaust system, which can meet the requirements of fire stability and fire integrity within a certain period of time and play the role of smoke isolation and fire resistance. When the temperature of flue gas discharged from the pipeline reaches (D)℃, the valve will automatically close.
a、 100 B、200 C、 180 D、280
29. When the fire, communication and alarm lines are laid in the dark, they should be protected by flame-retardant metal pipes or hard plastic pipes, and laid in the structure layer of non-combustible, and the thickness of the protective layer should not be greater than (d) mm. ..
A, more than 50 B, less than 50°C, more than 40 D, less than 30.
30. The wind pressure residual pressure value of smoke-proof stairwell should be (c) residual pressure of front room and shared front room.
A, less than B, equals C, greater than D, not less than.