现已上线！2025 年 Telegram 研究 — 年度关键洞察 
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The instrument used for accurately measuring velocity of water is :
Which of the following pump is successful used for water to the turbine ?
The efficiency of an centrifugal pump is expressed in term of ?
A cyclic device which produces work continuously at the expense of heat input is known as : [ RRB JE -2015 ]
Petrol and diesel engines of automobile are : [ RRB JE 2015 ]
Which of the following is unit for universal gas constant ?
Which one of the following is defined as force per unit length . [ RRB JE - 2015 ]
The following device could be used to measure discharge in pipe flow ?
