【Multiple Choice】The boiler three-impulse feedwater automatic adjustment system ( ) is the main signal.
a. Drum water level.
b. Water supply flow.
c. Steam flow.
d. Feed water pressure.
Answer: A Multiple choice question] When the sewage rate and the alkalinity of the pot water are constant, the amount of soda ash should be calculated according to the ( ) of the feed water.
a. Total hardness.
b. Non-carbonate hardness.
c. Carbonate hardness.
Answer: B multiple choice question] The selection of spring-type safety valve should not only be based on the working pressure and temperature of the medium to choose the valve ( ), but also the spring ( ).
a. Set the pressure.
b. Nominal pressure.
c. Jumping level.
d. Pressure level.
Answer: BD Multiple Choice Question] Elemental Analysis of Coal The element analyzed is ( ).
a、cb、h
c、sd、o
E, n Answer: ABCDE
True or False] When the amount of fuel is the same for burning oil and pulverized coal, the required air volume is also the same.
a. Correct. b. Error.
Answer: B True or False] The hot water boiler should be equipped with measures to prevent or reduce the vaporization of the pot water caused by the sudden shutdown of the circulating water pump of the hot water system.
a. Correct. b. Error.
Answer: A True or False] Before the combustion equipment is put into use, the cold and hot tests should be carried out according to the requirements of the standard.
a. Correct. b. Error.
Answer: A True or False] The flash point is an important basis for assessing the fire hazard of liquids, and the lower the flash point, the greater the fire hazard.
a. Correct. b. Error.
Answer: A. True or False] The most important purpose of formulating the "Special Equipment Safety Law of the People's Republic of China" is to sanction all kinds of special equipment safety violations and crimes.
a. Correct. b. Error.
Answer: B True or False] The industrial boiler stoker labor delivery system is an important part of ensuring the safety of the boiler.
a. Correct. b. Error.
Answer: a