Questions and Verified Answers 2026\2027
update
1. What is the minimum height of barricade in place around an open wellway?-
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Ans>> 42 inches
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2. What is the maximum angle of inclination for moving walks?
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Ans>> 12 degrees v
3. What is the major advantage of a hydraulic elevator?
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,Ans>> Requires less building structural support v v v v
4. If all other elements in a hydro elevator remain the same, what would be the eff
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ect of increasing the size of the oil line?
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Ans>> Rate of flow is reduced v v v v
5. What tool is used to check a jack hole for plumb?
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Ans>> Spider bob v
6. What is the operating pressure of a hydro elevator with a gross weight of 25
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00lbs and a plunger area of 20 square in?
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Ans>> 125psi (2500/20) v
7. An oil reservoir is 22in long and 24in wide, how many gallons of oil will it
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, take to fill it to a depth of 18in?
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Ans>> 42gal
(22x24x18 = 9504) (9504/231= 41.14) v v v v
8. Why is it important to follow a welding procedure using a sequence of short w
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elds on opposite sides of the cylinder?
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Ans>> To prevent warping of cylinder
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9. If all other elements of a hydro elevator remain the same, what would be the eff
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ect of increasing the diameter of the plunger?
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Ans>> System pressure would be reduced v v v v
10. If the jack unit is installed in the well hole long before the elevator will be co
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mpleted, how do you prevent rusting of the plunger?
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Ans>> Fill with oil v v
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