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4. In comparison to roller chain the silent chain-type now utilizes
____________sprockets and a semi-articulating mesh action.
5. In the drilling system, ___________ are primarily used for
the mud pumps; however, smaller installations are used for a
multitude of auxiliary drives such as generators, washdown
pumps, oil pumps, etc.
6. V-belts are driven by the action of the __________ upon
the sides of the belt.
7. For __________with separate skid mounting, it is
recommended that the pump skid be mounted in a _________
equipped with screws or turnbuckles to provide ample take-up for
center adjustment.
8. Some V-belt drives on slush pumps exhibit strong
vibration of the belts, thus contributing to premature
_________particularly on drives employing flat (back-bending)
idlers on the slack side.
9. The ______________ is actually a double helical gear cut
together so that the end thrust obtained with a helical gear will be
cancelled out.
10. Poly-V drive is a single unit belt in which the strength
member covers the __________ of sheave and eliminates V-belt
matching and turnover.

Exercise 5. Find Ukrainian and English equivalents to
the following words and study them
pitch chain втулково-роликовий ланцюг
efficient operation внутрішнього згорання
sprocket вал
gear drive підшипник вала
silent chain відцентрова сила
vibration absorption послабляти
eccentricity внутрішній діаметр
cradle привід насосу
tension технологічний режим

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