PART 3

Question 1

A drop in outlet pressure of a regulator or control valve due to the travel of its valve or poppet as the required flow increases from low to maximum.

Answer 1

droop

Question 2

A nondestructive examination (NDE) method for detecting the presence of surface cracks and surface imperfections in welds or castings through use of a special red dye.

Answer 2

dye penetrant inspection

Question 3

A sealing element used between parts that have relative motion, such as stem seals and seat seal O-rings.

Answer 3

dynamic seal

Question 4

A valve or a system of valves that, when activated, initiate a shutdown of the plant, process or platform they are tied to.

Answer 4

emergency shutdown valve (ESDV)

Question 5

A gate valve comprising a separate gate and segment that move without touching the seats as the valve operates the gate and segment.

Answer 5

expanding gate valve

Question 6

Any device used for connecting elements in fluid lines, including elbows, tees, nipples, unions and flanges

Answer 6

fitting

Question 7

A formed pipe fitting consisting of a projecting radial collar with bolt holes to provide a means of attachment to piping components having a similar fitting.

Answer 7

flange

Question 8

The number of gallons of water per minute that will flow through a valve with a pressure drop of 1 psi

Answer 8

flow coefficient, Cv

Question 9

The tearing of metal when two elements rub against each other.

Answer 9

galling

Question 10

The ratio of the gas volumetric flow rate to the total volumetric flow rate of all fluids.

Answer 10

gas volume fraction (GVF)

Question 11

The ratio of produced gas volume to total produced liquids (oil and water) volume

Answer 11

gas/liquid ratio (GLR)

Question 12

The ratio of the volume of gas that comes out of solution to the volume of oil at standard conditions.

Answer 12

gas/oil ratio (GOR)

Question 13

A straight-through pattern valve whose closure element is a wedge or parallel-sided slab, situated between two fixed seating surfaces with means to move it in or out of the flow stream in a direction perpendicular to the pipeline axis.

Answer 13

gate valve

Question 14

A valve part that retains or compresses the stem packing in a stuffing box (where used) or retains a stem O-ring, lip seal or stem O-ring bushing.

Answer 14

gland bushing

Question 15

A valve whose closure element is a flat disc or conical plug sealing on a seat that is usually parallel to the flow axis

Answer 15

globe valve