If a single cylinder relief valve on a diesel engine lists frequently while the engine is running, the cause may be an （）

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• Which of the following problems will occur if the internal drain at either end of a hydraulic, two-way, spool-type directional control valve cylinder were to become plugged?（）

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  A . realized B . practiced C . maintained D . exercised

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• A single piece（） fitted with bronze rings guides the piston in the cylinder liner.

  A . piston skirt B . piston crown C . guide way D . cross-head

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• In a single acting, two-stroke/cycle, diesel generator engine, the power impulse in an individual cylinder occurs （）

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  A . the control rod B . the hunting gear C . the floating ring D . the tiller arm

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  A . connecting rods B . main bearing C . column D . tie rod

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• If the relief valve on a diesel engine cylinder lifts, the cause could be due to （）

  A . liquid in the cylinder B . low compression in the cylinder C . high exhaust temperature D . poor fuel penetratio

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  A . her B . their C . its D . hi

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• Accommodation in a family home providing a single bedroom,breakfast and evening meal will cost around＄80 per week.Alternatively,if you wish to cook for yourself,accommodation in a single room in a family home would be approximately＄50 per week.

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