Hydraulic Self-Assessment Questionnaire

Referring to the basic building blocks of hydraulics, the prime mover supplies

The hydraulic pump creates:

The size of the hydraulic pump is measured as:

The amount of oil from a pump is determined by:

The key areas of control in a hydraulic circuit are:

The relief valve in a hydraulic circuit sets:

The pressure created in a hydraulic circuit is described as:

What does the term displacement refer to in relation to a hydraulic pump:

The operating temperature of an open hydraulic circuit as measured at the reservoir should ideally not exceed:

When setting a relief valve in a hydraulic circuit do you place the pressure gauge:

A pressure reducing valve is used to:

What formulae can be used to calculate the force exerted by a hydraulic cylinder:

If the same pressure is supplied to the full bore and annulus side of a cylinder at the same time, will the cylinder:

A flow control valve, when used in conjunction with a hydraulic motor will control:

A flow control valve, when used in conjunction with a hydraulic cylinder will control:

The flow of oil through a throttle valve, once set, will:

An Accumulator is an:

When changing a valve on a circuit that contains an accumulator the accumulator must be:

A relief valve set at 150bar will pass oil:

When oil passes from a high pressure to a low pressure without doing work:

The most common cause of hydraulic failures is:

A hydraulic fluid is referred to as being HV32. What does the 32 refer to:

As the system pressure starts to increase, the flow from the pump:

Which of the pumps listed are fixed displacement only:

The speed of a hydraulic motor depends on:

What term is used to describe the aging process of an oil:

What is meant by the term ‘meter in’ flow control:

What does the term ’displacement’ mean when applied to a pump:

Hydraulic drawings are drawn to an ISO standard. What is this standard:

A variable displacement hydraulic motor is supplied with a constant feed of 40 l/min. If the motor displacement is increased what happens to torque and speed:

Hydraulic Oils often contain a VI Improver to initially:

Oil in a system will always flow:

In a pressure compensated flow control valve, what does the compensator control:

When the vent port on a pilot operated 2 stage relief valve is connected to tank:

The term ’cracking pressure’ relates to:

The path of oil in an external gear pump is:

When setting a pressure reducing valve, the gauge is placed:

Why would the ‘actual’ flow rate from a pump differ from the ‘theoretical’:

How would you add oil to a system:

When doing a pump Q.P. test what factors should be recorded:

What is the likely effect on a pump with a tank that has a blocked breather:

How many litre of oil will be held in a reservoir that is ¾ full and its dimensions are 1m high, by 1m wide by 1 m long:

When installing a ISO 03(CETOP 3) Direction Control Valve on to a sub plate, the valve can be:

Oil can be injected into the skin at pressures as little as 6bar – if it occurs:

A pilot operated check valve should be used to hold a suspended load whilst maintenance work is carried out:

The gas used to pre charge an accumulator:

A hydraulic pump has a displacement of 30 cc/rev at a speed of 1500 rpm, what is the flow:

The cushion on a hydraulic cylinder should be:

By increasing the setting of a relief valve the torque output of a hydraulic motor can be:

A pressure compensated pump will start up:

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