Question

Put the verb in brackets into the correct form to complete passive sentence. 1.Discharge rate (to control) by throttling the discharge valve. 2.Clearances should always (to check) against the manufacturers manuals. 3.Oil cups must regularly (to fill) when the pump is in use. 4.Air reservoir (to install) on the discharge side to reduce pulsation. 5.Synchronizing gears usually (to mark) before removing the screws. 6.Multi-stage pumps (to require) to provide higher discharge pressures.

Answer 1

Is controlled
be checked
be filled
is installed
are marked
are required

Answer 2

1. The discharge rate is controlled by throttling the discharge valve. 2. Clearances should always be checked against the manufacturers' manuals. 3. Oil cups must be regularly filled when the pump is in use. 4. An air reservoir is installed on the discharge side to reduce pulsation. 5. Synchronizing gears are usually marked before removing the screws. 6. Multi-stage pumps require higher discharge pressures to be provided.

Please note that the above answers are based on general knowledge and understanding of passive sentence construction.