Online Engineering Continuing Education Courses

Introduction to matter, energy & direct current

Quiz Questions:

1.	Matter is defined as anything that occupies space and has weight; that is, the weight and dimensions of matter can be measured.

		True
		False

2.	When two or more elements are chemically combined, the resulting substance is called a ________.

		Compound
		Element

3.	A___________ is considered to be a negative charge of electricity.

		Electron
		Proton
		Neutron

4.	______________ is defined as the opposition of a material to being magnetized.

		Permeability
		Reluctance

5.	_______________ is the number of flux lines per unit area.

		Flux intensity
		Flux density

6.	The potentiometer and the rheostat are variable resistors and can be adjusted to any resistance value within their ohmic range.

		True
		False

7.	A cell is a device in which chemical energy is converted to electrical energy. This process is called _________________ action.

		Electrochemical
		Electro physical

8.	Polarization is the effect of hydrogen surrounding the cathode of a cell, which increases the internal resistance of the cell.

		True
		False

9.	Dry cell is the type commonly referred to as the ______________.

		Flashlight battery
		Inverter

10.	A basic electric circuit consists of a source of mechanical energy connected to a load.

		True
		False

11.	_______________ is the electrical force or pressure operating in a circuit.

		Ampere
		Voltage

12.	The ________________of an electrical device is equal to the electrical power converted into useful energy divided by the electrical power supplied to the device.

		Power
		Efficiency

13.	The _____________ law states algebraic sum of the voltage drops in any closed path in a circuit and the electromotive forces in that path is equal to zero, or Ea + Eb + Ec +...En = 0.

		Kirchhoff's current
		Kirchhoff's voltage

14.	A short circuit is one in which a break exists in the complete conducting pathway.

		True
		False

15.	A CO2 extinguisher should be used to extinguish electrical fires.

		True
		False

16.	GASSING is the production of nitrogen gas caused by a portion of the charge current breaking down the water in the electrolyte.

		True
		False

17.	Electrical components are often given a power rating.

		True
		False

18.	All sources of electromotive force do not have some form of internal resistance, which causes a drop in terminal voltage as current flows through the source.

		True
		False

19.	The voltage developed by the bleeder resistor must not be equal to the voltage requirement of the load in parallel with the bleeder resistor.

		True
		False

20.	_______________ is a unit of measurement often used to rate electrical motors.

		Horsepower
		Watt power