UNIT 2: ELECTRICAL

1. A board consisting of a number of panels:

• 1. A) Circuitboard

• 1. B) Switchboard

• 1. C) Panelboard

• 1. D) Motherboard

1. Material that does not allow water to get into it:

• 1. A) Waterproof

• B) Watertight

• 1. C) Raintight

• 1. D) Dustproof

Material that doesn't allow rain to get into it:

• 1. A) Waterproof

• 1. B) Watertight

• 1. C) Raintight

• 1. D) Explosionproof

1. A board consisting of a number of electrical switches:

• 1. A) Switchboard

• 1. B) Panelboard

• 1. C) Circuitboard

• 1. D) Motherboard

1. Conductors which are perfect, conducting a current without a battery:

• 1. A) Conductor

• 1. B) Semiconductors

• 1. C) Superconductor

• 1. D) Insulator

1. Material that will not be damaged in an explosion:

• 1. A) Explosionproof

• B) Watertight

• C) Fireproof

• 1. D) Raintight

1. Current which is greater than the load for which the system or mechanism was intended:

• 1. A) Overcurrent

• 1. B) Overload

• 1. C) Overcharge

• 1. D) Overvoltage

1. Material that does not allow dust to get into it:

• 1. A) Dustproof

• 1. B) Watertight

• 1. C) Raintight

• 1. D) Explosionproof

It produces a narrow beam of light and can be used to read barcodes in a supermarket, play compact discs, etc.:

• 1. A) Laser

• 1. B) Lamp

• 1. C) LED

• 1. D) Flashlight

  A word to describe any piece of equipment made for a specific purpose:

• 1. A) Machine

• 1. B) Device

• 1. C) Gadget

• 1. D) Tool