An AND valve can allow flow alternatively from its inlets. Select : true or False

When fitting a freshly ground valve into a freshly ground seat: Technician A says that the seat should be ground more with the same stone if the margin is too small. Technician B says that the seat should be ground more with the same stone if the valve seat is too high. Who is correct?

Which of the following prevents rapid switching on and off control valves in pressure control systems? a. compare actual pressure to the upper and lower limits b. compare actual pressure to the desired pressure value c. compare actual pressure to the center of the dead band d. compare actual pressure to the maximum and minimum valve positions.

The difference between pressure relief valve and pressure reducing valve is,

Initially, the gas pressure is less than the outside atmospheric pressure.   When valve 1 is opened, while valve 2 remains closed, the fluid level h1  ______.   Question 10 options:   decreases   stays constant   increases

The hydraulic system is free from noise and produces high pressure. Select one:TrueFalse     Hydraulic valves and their actuators are more in weight and can handle less amount of pressure. Select one:TrueFalse

What part of the circulating system has the maximum pressure drop across it? a. Drill pipe b. Surface line c. Drill collar d. Bit nozzles

Initially, the gas pressure is greater than the outside atmospheric pressure. When valve 1 is opened, while valve 2 remains closed, the fluid level h1  ______.   Question 13 options:   stays constant   increases   decreases

What type of valve use simple discs, cones or balls are used in conjunction with simple valve seats to control flow

At the pump's shutoff head, the pump efficiency is maximum. O True O False