1.A technician is  traversing a duct and obtains the following 8 velocity readings: 500 fpm, 400 fpm, 375 fpm, 625 fpm, 275 fpm,360 fpm,420 fpm, and 575 fpm. What is the velocity value that will be used for system calculations?

Slip of a reciprocating pump is negative, when____  A•suction pipe is short and pump is running at low speeds  B•delivery pipe is long and pump is running at high speeds  C•suction pipe is short and delivery pipe is long and the pump is running at low speeds  D•suction pipe is long and delivery pipe is short and the pump is running at high speeds.

A shop-vac is capable of pulling in air at a rate of 210 ft³/min . What is the rate of the vacuum's air flow in L/s

Solve ASAP.