An Apartment Building Has the Following Distribution of Apartments If an Apartment Is Selected at Random, What Is the

question 39

Multiple Choice

An apartment building has the following distribution of apartments:
$\begin{array} { l l l l } & \underline { 1 } \text { bedroom } & \underline { \text { 2 bedroom } } & \underline { \mathbf { 3 } \text { bedroom } } \\ \text { 1st floor } & 3 & 1 & 1 \\ \text { 2nd floor } & 1 & 3 & 2 \\ \text { 3rd floor } & 1 & 4 & 1 \end{array}$
If an apartment is selected at random, what is the probability that it is on the 2nd floor or has 2 bedrooms?

• A) \(\frac { 6 } { 11 }\)
• B) \(\frac { 14 } { 17 }\)
• C) \(\frac { 11 } { 17 }\)
• D) \(\frac { 8 } { 11 }\)

Understand the benefits and principles of VFD (Variable Frequency Drive) technology and its impact on motor operation.

Identify the types of motors that are compatible with VFDs and their characteristics.

Describe the significance of the affinity laws in relation to pump and fan operation.

Explain the purpose and function of PWM (Pulse Width Modulation) in VFDs.