The Electricians Green Handbook
Chapter 1 - Conversion

TRUE/FALSE

	1.	Nikola Tesla discovered the “Tesla Effect.”

ANS:	F	REF:	Introduction

	2.	In Edison’s time, the power that we used for our homes was AC.

ANS:	F	REF:	Introduction

	3.	You can say that a given voltage is positive with respect to the negative point.

ANS:	T	REF:	Waveforms

	4.	One hertz is equal to one complete cycle per second.

ANS:	T	REF:	Waveforms

	5.	A bridge rectifier uses diodes to provide full wave rectification.

ANS:	T	REF:	Rectifier

MULTIPLE CHOICE

	1.	The basic operation of a(n) ____ is to pass current in one direction only.
a.	inverter	c.	converter	
b.	rectifier	d.	transformer	

ANS:	B	REF:	Rectifier

	2.	In a bridge rectifier, the ____ of the output is the same regardless of the polarity of the input.
a.	quality	c.	delay	
b.	efficiency	d.	polarity	

ANS:	D	REF:	Bridge Rectifier	

	3.	You should never discharge the capacitor by ____.
a.	shorting the terminals	c.	heating it	
b.	disconnecting it without turning it off	d.	turning it off	

ANS:	A	REF:	Inverter

	4.	A motor generator set is a DC motor driving a(n) ____.
a.	rectifier	c.	bridge rectifier	
b.	AC alternator	d.	inverter	

ANS:	B	REF:	Inverter

	5.	In 1957, the solid-state inverter became practicable with the introduction of the ____.
a.	thyristor	c.	bridge rectifier	
b.	rectifier	d.	diode	

ANS:	A	REF:	Inverter

	6.	Inverters are also known as ____.
a.	thyristors	c.	oscillators	
b.	diodes	d.	rectifiers	

ANS:	C	REF:	Inverter

	7.	Square waves are full of ____.
a.	phase distortion	c.	frequency distortion	
b.	amplitude distortion	d.	harmonic distortion	

ANS:	D	REF:	Inverter

	8.	The Modified Square Wave is also called the ____.
a.	Quasi Cosine Wave	c.	Modified Sine Wave	
b.	Cosine Wave	d.	Tangent Wave	

ANS:	C	REF:	Inverter

	9.	The USB 2.0 specification has a data transfer rate up to ____.
a.	60 Mbit/s	c.	240 Mbit/s	
b.	120 Mbit/s	d.	480 Mbit/s	

ANS:	D	REF:	Alternative Energy Monitoring Systems	

	10.	Ethernet is a computer networking technology for ____.
a.	Wide Area Networks (WANs)	
b.	Metropolitan Area Networks (MANs)	
c.	Local Area Networks (LANs)	
d.	Wireless Local Area Networks (WLANs)	

ANS:	C	REF:	Alternative Energy Monitoring Systems 	

SHORT ANSWER

	1.	What is frequency measured in?

ANS:	
Frequency is measured in hertz.

REF:	Waveforms

	2.	What is the bridge rectifier also called?

ANS:	
The bridge rectifier is also called the Graetz circuit after Leo Graetz who invented it in 1880.

REF:	Bridge Rectifier	

	3.	What is Bluetooth?

ANS:	
Bluetooth is an open wireless protocol for exchanging data over short distances.

REF:	Alternative Energy Monitoring Systems	

	4.	What does TCP stand for?

ANS:	
TCP stands for Transmission Control Protocol.

REF:	Alternative Energy Monitoring Systems	

	5.	How do power line communication systems operate?

ANS:	
All power line communication systems operate by impressing a modulated signal on the wiring system that is used to supply the power.

REF:	Alternative Energy Monitoring Systems