Relays automotive

Back EMF is prevented by...?

• A spike protection resistor

• The fuse

• The armature

• The relay coil

A transfer relay is used to ...?

• Switch very high voltages

• Switch between two circuits

• Switch two circuits simultaneously

• Switch very high currents

The load of a relay circuit is normally connected to pin:

• 87

• 85

• 30

• 86

The side of the relay circuit containing the inductive core is...?

• The power side

• The ground side

• The control side

• The load side

What are the causes of relay failure?

• Excess current

• contact contamination

• wear and tear

On the automotive relay, pin 30 is connected to...?

• The control switch

• Ground

• The control module

• Power source

The part of the relay attracted by the magnetic source is known as

• The contacts

• The coil

• The armature

• The resistor

One of the functions of a relay is ...?

• to prevent electro-magnetic feedback

• to use a large current to control a small current

• to use a small current to control a large current

• to protect the circuit from overload

A normally open 4 pin relay will have the switch contacts...?

• closed when the relay is energized

• always open

• always closed

• open when the relay is energized

A normally closed 4 pin relay will have the pins...?

• 30 87b 85 86

• 30 97 85 86

• 30 87 85 86

• 30 87a 85 86