Question 1

In a half-wave rectifier, the diode conducts ________.

Accepted Answer

A)  For the entire input signal 
B)  For only 90 degrees of the input signal 
C)  For only 180 degrees of the input signal 
D)  For only 270 degrees of the input signal 
A)  For the entire input signal 
B)  For only 90 degrees of the input signal 
C)  For only 180 degrees of the input signal 
D)  For only 270 degrees of the input signal

Question 2

The typical input frequency of a power supply is _______.

Accepted Answer

A)  60Hz 
B)  100Hz 
C)  120Hz 
D)  300Hz 
A)  60Hz 
B)  100Hz 
C)  120Hz 
D)  300Hz

Question 3

What is the ripple percentage of a typical unfiltered full-wave rectifier?

Accepted Answer

A)  121% 
B)  100% 
C)  50% 
D)  48% 
A)  121% 
B)  100% 
C)  50% 
D)  48%

Question 4

The "hot" power line is staked at a permanent ground reference by the power company.

Accepted Answer

A) True 
 B)False

Question 5

A primary protector is used to protect the main system from higher voltage lightning strikes or switching transients on the input side of the power line.

Accepted Answer

A) True 
 B)False

Question 6

An example of a primary protector is _________.

Accepted Answer

A)  A UPS 
B)  A fuse 
C)  A lightning arrestor 
D)  A harmonic filter 
A)  A UPS 
B)  A fuse 
C)  A lightning arrestor 
D)  A harmonic filter

Question 7

What is the purpose of an Uninterruptible Power Supply (UPS)?

Accepted Answer

A)  Provides AC regulation 
B)  Provide steady-state power during a total failure of the main supply input 
C)  Provide filtering 
D)  All the above 
A)  Provides AC regulation 
B)  Provide steady-state power during a total failure of the main supply input 
C)  Provide filtering 
D)  All the above

Question 8

According to the National Electrical Code, After a main power failure, the activation of an emergency system must take place within ________.

Accepted Answer

A)  10 seconds 
B)  30 seconds 
C)  45 seconds 
D)  1 minute 
A)  10 seconds 
B)  30 seconds 
C)  45 seconds 
D)  1 minute

Question 9

Which type of battery is not rechargeable?

Accepted Answer

A)  Primary Cell 
B)  Secondary Cell 
C)  Minor Cell 
D)  Series-connected cell 
A)  Primary Cell 
B)  Secondary Cell 
C)  Minor Cell 
D)  Series-connected cell

Question 10

If the input frequency of a half-wave rectifier is 60Hz, what will be the output frequency?

Accepted Answer

The answer of If the input frequency of a half-wave...

In a half-wave rectifier, the diode conducts ________.

The typical input frequency of a power supply is _______.

What is the ripple percentage of a typical unfiltered full-wave rectifier?

The "hot" power line is staked at a permanent ground reference by the power company.

A primary protector is used to protect the main system from higher voltage lightning strikes or switching transients on the input side of the power line.

An example of a primary protector is _________.

What is the purpose of an Uninterruptible Power Supply (UPS)?

According to the National Electrical Code, After a main power failure, the activation of an emergency system must take place within ________.

Which type of battery is not rechargeable?

If the input frequency of a half-wave rectifier is 60Hz, what will be the output frequency?

Introduction to the National Electrical Code

Electrical Conductors and Cable

Grounding and Bonding and the 2011 National Electrical Code, Articles 250, 800, 810, and 820

Audio Physics

Audio Signal-Processing, Amplification, and Reproduction Equipment and National Electrical Code Article 640

Networking and Information Technology Equipment

Article 725 of the National Electrical Code; Classification of Circuits

Fire Alarm Systems and National Electrical Code Article 760

Fiber-Optic Cable and National Electrical Code Article 770

Telecommunications, and National Electrical Code Article 800

Security and Card Access System Basics

Wireless Communications and National Electrical Code Article 810

Close Circuit Television Camera Systems and National Electrical Code Article 820

Filters

Exam 7: Power Supplies, Batteries, and Emergency Systems

In a half-wave rectifier, the diode conducts ________.

The typical input frequency of a power supply is _______.

What is the ripple percentage of a typical unfiltered full-wave rectifier?

The "hot" power line is staked at a permanent ground reference by the power company.

A primary protector is used to protect the main system from higher voltage lightning strikes or switching transients on the input side of the power line.

An example of a primary protector is _________.

What is the purpose of an Uninterruptible Power Supply (UPS)?

According to the National Electrical Code, After a main power failure, the activation of an emergency system must take place within ________.

Which type of battery is not rechargeable?

If the input frequency of a half-wave rectifier is 60Hz, what will be the output frequency?

Introduction to the National Electrical Code

Electrical Conductors and Cable

Grounding and Bonding and the 2011 National Electrical Code, Articles 250, 800, 810, and 820

Audio Physics

Audio Signal-Processing, Amplification, and Reproduction Equipment and National Electrical Code Article 640

Networking and Information Technology Equipment

Article 725 of the National Electrical Code; Classification of Circuits

Fire Alarm Systems and National Electrical Code Article 760

Fiber-Optic Cable and National Electrical Code Article 770

Telecommunications, and National Electrical Code Article 800

Security and Card Access System Basics

Wireless Communications and National Electrical Code Article 810

Close Circuit Television Camera Systems and National Electrical Code Article 820

Filters