【Multiple Choice】In the quality requirements for acetone, the water content is strictly limited to prevent (
a. Electrochemical corrosion.
b. Reduce the solubility of acetylene.
c. Chemical reaction with acetylene.
d. Icing. Answer: B
Multiple choice question] The nominal working pressure is one level higher than the specified starting level of the cylinder coating ( ) color ring.
a, a. b, two ways.
c. Three ways. Answer: a
Multiple choice question] The place where the acetylene bottle is used shall not be close to the heat source and electrical equipment, and the distance from the open flame shall not be less than ( ) When working at height, this distance is the vertical projection distance on the ground), and the spark shall not be emitted on the acetylene bottle.
a、5mb、10m
Answer: B Multiple Choice] At standard atmospheric pressure, the liquefaction temperature of oxygen is below zero ( ).
a、267b、183
c、196d、186
Answer: B True or False] The daily maintenance of gas cylinders should be the responsibility of the gas cylinder filling unit.
a. Correct. b. Error.
Answer: A. True or False] Liquid oxygen exposure can cause severe frostbite and have a serious destructive effect on tissue cells. The first aid treatment is to gently soak the frostbitten surface in hot water to thaw it.
a. Correct. b. Error.
Answer: B True or False] For gas cylinders containing flammable gases and toxic gases, they can be directly discharged into the atmosphere when the valve of the cylinder is ruled out.
a. Correct. b. Error.
Answer: B True or False] Gas cylinders with incomplete, damaged or non-compliant attachments are not allowed to be filled.
a. Correct. b. Error.
Answer: A True/False Question] Special equipment operators who interrupt their engagement in licensed projects for more than 12 months during the review period are not qualified for the review.
a. Correct. b. Error.
Answer: A True or False] The fixed vehicle liquefied petroleum gas cylinder belongs to the gas cylinder that controls the filling operation of the gas cylinder by the gravimetric method.
a. Correct. b. Error.
Answer: B