【Daily Question】2015.09.23 (2 Wealth points for replying, +3-8 Wealth points for a correct answer)
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This post was last edited by WQC on 2015-9-24 at 15:26. The Mechanical Section has introduced the \"One Question per Day\" feature, which aims to foster an active atmosphere for technical exchanges and guide the direction of such discussions, while also providing users with financial rewards to help them experience various cool features. Single-choice question: The outlet flow rate of a reciprocating pump cannot be adjusted by the （ ） method. A. Export return line adjustment ； B. Change the motor speed ； C. Change the piston stroke ； D. Adjust the outlet valve. Answer: D. Please note: we will close this thread after 24 hours, and at that time we will announce the best reply (the best assistance), as well as the answer and explanation. Charisma Reward: If you post a topic in this section within two days to provide a detailed explanation or discussion of the knowledge points related to this question, please reply/comments in this post to let us know, and we will have a moderator award you charisma points. It is not allowed to simply copy and paste; original content is preferred, with at least some organization by the user along with personal insights and opinions. After registration, we will rank based on the content of the posts: the last-place contestant will receive +1 charm, the second-to-last +2 charm, and so on, with the highest score getting +5 charm.
The (D) method cannot be used for adjusting the outlet flow rate of a reciprocating pump.
The (B) method cannot be used for adjusting the outlet flow rate of a reciprocating pump. A. Export return line adjustment ； B. Change the motor speed ； C. Change the piston stroke ； D. Adjust the outlet valve.
The (D) method cannot be used for adjusting the outlet flow rate of a reciprocating pump. A. Export return line adjustment ； B. Change the motor speed ； C. Change the piston stroke ； D. Adjust the outlet valve.
The answer is D, the answer is D, the answer is D
Adjusting the outlet flow rate of a reciprocating pump is not feasible (D: Adjust the outlet valve). ) method. Reciprocating pumps cannot have their flow rate adjusted by reducing the outlet valve, as this wastes energy and may even cause the pump’s drive mechanism to become overloaded. Reciprocating pumps generally use the following methods to regulate flow: 1. Bypass regulation – A bypass pipe is installed on the reciprocating pump, and the opening degree of the bypass valve is adjusted so that the liquid is returned to the suction pipe, thereby reducing the flow rate in the pump’s discharge pipe. A safety valve should be installed on electric reciprocating pumps; it opens when the pressure in the discharge pipe becomes too high, thereby preventing the pump and the prime mover from being overloaded. II. Changing the speed of the reciprocating pump: As can be seen from the formula for calculating the flow rate of a reciprocating pump, using a variable-speed motor to adjust the speed of the pump allows for the regulation of its flow rate. III. Changing the stroke of the piston or plunger in a reciprocating pump: The stroke of the piston or plunger can be altered by changing the eccentricity, the clearance of the plunger, as well as the length and position of the connecting rods in the linkage mechanism, thereby changing the flow rate of the reciprocating pump. IV. Adjusting flow rate using a push-type reciprocating pump: The motor can utilize the suction valve of the push-type pump to allow the liquid in the suction cylinder to return to the suction pipe during the return stroke, thereby reducing the discharge flow rate of the reciprocating pump.
The (C) method cannot be used for adjusting the outlet flow rate of a reciprocating pump. A. Export return line adjustment ； B. Change the motor speed ； C. Change the piston stroke ； D. Adjust the outlet valve.
The (D) method cannot be used for adjusting the outlet flow rate of a reciprocating pump
The (D) method cannot be used for adjusting the outlet flow rate of a reciprocating pump. A. Export return line adjustment ； B. Change the motor speed ； C. Change the piston stroke ； D. Adjust the outlet valve.
The (D) method cannot be used for adjusting the outlet flow rate of a reciprocating pump. A. Export return line adjustment ； B. Change the motor speed ； C. Change the piston stroke ； D. Adjust the outlet valve.
The (D) method cannot be used for adjusting the outlet flow rate of a reciprocating pump. A. Export return line adjustment ； B. Change the motor speed ； C. Change the piston stroke ； D. Adjust the outlet valve.