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TEXAS GENERAL PUMP INSTALLER CERTIFICATION
EXAM 2026 – QUESTIONS & ANSWERS WITH
RATIONALES
Which of the following tools should be used to remove a lantern ring? - CORRECT ANSWER = Packing hook The two units of measuring liquid pressure are - CORRECT ANSWER = Psi and ft of head The main purpose of a stuffing box lantern ring is to - CORRECT ANSWER = Improve lubrication of the packing One electrical horsepower equal ________ watts. - CORRECT ANSWER = 746 After grouting a baseplate, you should allow the grouting mixture to set for at least - CORRECT ANSWER = 48hr When installing four or more, you should stagger the joints ________° apart. - CORRECT ANSWER = 90
In general, runout on a shaft should not exceed ________ in. - CORRECT ANSWER =. After installing the new packing, tighten the gland one turn each - CORRECT ANSWER = 15 minutes The riser used to vent a system at the discharge side of the pump should be ________ times as long as the diameter of the pipe. - CORRECT ANSWER = 5 Which of the following is used to adjust the speed of the prime mover to the speed? - CORRECT ANSWER = Auxiliary drive Water stored in a reservoir at the top of a pipe has which type of energy? - CORRECT ANSWER = Potential The most common sign of cavitation in a pump impeller is - CORRECT ANSWER = Pitting on the back side of the vanes If a rotary pump is not delivering fluid at its discharge side, the first thing you should do is - CORRECT ANSWER = Stop the pump Internal bearings on rotary pumps are most often lubricated by - CORRECT ANSWER = The fluid being pumped
The formation of vapor pockets, or bubbles, within the liquid is called - CORRECT ANSWER = Cavitation What is the first thing you should do when stopping a pump? - CORRECT ANSWER = Close the discharge valve Loss of clearance between wearing rings is called - CORRECT ANSWER = Ring seizure Static suction lift works by having the pump create (a) - CORRECT ANSWER = Vacuum When overhauling a centrifugal pump, the seals should be - CORRECT ANSWER = Replaced When aligning motor and pump shafts during installation, the coupling halves should be - CORRECT ANSWER = Disconnected Which of the following is used to align bolts during the assembly of a centrifugal pump? - CORRECT ANSWER = Dowel pins The available NPSH of a system should be ________ the required NPSH of the pump. - CORRECT ANSWER = Equal to or greater than
When removing springs from pump feet, you should measure movement with a - CORRECT ANSWER = Dial indicator Work is calculated as force multiplied by - CORRECT ANSWER = Distance Unwanted movement of a pump shaft along its axis is called - CORRECT ANSWER = End play The major cause of burned seals is - CORRECT ANSWER = Improper lubrication When installing a new gasket, you may wish to apply ________ to the lower half of the ceiling. - CORRECT ANSWER = Shellac Which type of gears should be used in rotary pump applications requiring high operating speeds? - CORRECT ANSWER = Helical The area that surrounds and houses the packing in a pump is called the
- CORRECT ANSWER = Stuffing box Which problem results when clearance between gear teeth has enlarged because of tooth wear? - CORRECT ANSWER = Loss of pressure
The most common mechanical seal configuration is the ________ seal. - CORRECT ANSWER = Single internal Cavitation is caused by - CORRECT ANSWER = Pressure loss Before inspecting a pump housing, clean it with - CORRECT ANSWER = Solvent and wire brush When a pump is located below the source of supply, the vertical distance from the supply level to the pump centerline is called - CORRECT ANSWER = Static suction head Too much clearance between the stationary rings and the impeller or rotating of a centrifugal pump will cause - CORRECT ANSWER =? Measure of Pressure to Head - CORRECT ANSWER = Pressure x 2.31 = Head Measure of Head to Pressure - CORRECT ANSWER = Head x 0.434 = Pressure Pump Capacity (GPM - CORRECT ANSWER = = Total gallons used divided by 7 times
Total Suction Lift is calculated by adding the following: - CORRECT ANSWER = Static water level Drawdown Friction Lose Elevation of pump (jet pumps only) Static Discharge - CORRECT ANSWER = it is the elevation of the highest water level above the top of the well in an open discharge system Friction Loss - CORRECT ANSWER = Friction increases as pipe diameter decreases Total pumping head is expressed in - CORRECT ANSWER = Feet of head (foh) or (psi) Calculated by Total suction static discharge head discharge system friction lose Friction loss in old pipes - CORRECT ANSWER = safety recommends 20% be added to the valves in friction loss table
If a drawdown in a tank varies 25% - CORRECT ANSWER = Adjust psi between cut in and cut out check air pressure check for leaks with soapy water check air volume controls in steel tank Pump Curve - CORRECT ANSWER = 1) Take take reading from gauge with throttle closed
- convert to feet of head and plot 3)continue to take readings at 5gpm increments and plot 4)connect all points to produce a head/capacity curve Electrical lines on pressure switch - CORRECT ANSWER = In at lines out to well are loads
