Electro Hydraulics Self-Assessment

Referring to the basic building blocks of Electrical circuits, the power supply provides the –

The potential difference of the power supply creates –

A semiconductor diode is a component that: –

The resistance of a conductor is: –

The key properties of control in an electrical circuit are: –

The fuse in an electrical circuit protects: –

When current flows through a resistance of a low voltage system energy is transferred, we detect this as: –

A ‘Relay’ can be used as: –

When controlling a hydraulic valve electrically, do we energise: –

What formulae can be used to calculate the voltage in a closed circuit: –

If a ‘fuse’ ruptures (blows) this is the result of:  –

A ‘capacitor’ can be used to: –

A basic transmission system requires these basic elements: –

Examples of electrical loads are: –

A ‘closed loop’ speed control system for a motor has to have: –

The current taken by an electric motor when starting is known as the: –

Before using a Digital Multi-Meter (DMM) you notice one of the cables to the probes has a bare wire showing, do you –

An inductive proximity sensor –

Piezo electric crystals are used in ultrasonic sensors because when electricity is applied to the crystal, the crystal:  –

The neutral wire on a single-phase system is –

Symbols on Electrical drawings should be drawn to a standard. What is this standard –

A 24V PNP capacitive proximity sensor will output:  –

A transistor can be used as a: –

The term ‘ripple’ relates to the –

Pulse Width Modulation (PWM) is used in modern proportional control systems to:  –

A resistor measurement of 120Ω when testing a CAN system on a mobile digger indicates –

The numbering on a set of relay contacts are 21 and 22 this indicates they are –

When using a Digital multi-meter to carry out voltage measurements on a system it is good practice to: –

When cables enter or leave cabinets or enclosures they should have –

A PT100 thermistor has a resistance of –

A solid-state relay –

The advantage of electro-magnetism over a permanent magnet is that:  –

One way to increase the magnetic effect of an electromagnet is to –

An inverter is used to: –

When starting a three-phase motor, the circuit breaker trips. To get the motor started you should:  –

A normally closed set of relay contacts: –

What does the symbol represent:

What does the symbol represent:

What does this symbol represent:

What does this symbol represent:

What does this symbol represent:

What does this symbol represent:

What does this symbol represent:

What does this symbol represent:

The term ‘Electro-Magnetic Interference’ refers to – 

What does this symbol represent:

What does “Positive Temperature Coefficient” mean –

What is the hydraulic equivalent to an Ammeter – 

What is the hydraulic equivalent to a Voltmeter –

What does the abbreviation DOL stand for? –

What must be considered when selecting the correct Multi-meter to use? –

When selecting a pressure transducer to fit in a hydraulic system what must you ensure –

What does the term “N-Type” mean with regards to semi-conductor components –

How can the temperature of the oil in a reservoir be monitored by a control system –

What does the abbreviation “BJT” stand for –

What does the abbreviation “PLC” stand for –

What does the abbreviation “BEMF” stand for –

What does the abbreviation “IP” stand for –

What does the abbreviation “PSU” stand for –

Which of these materials is a good insulator against electricity –