Unit 2 - Communication and Math Skills

Question 1

Name 3 reasons to keep concise daily records

Answer 1

1: To track plant performances and changes
2: To protect the utility from lawsuits
3: To comply with Provincial legislation

Question 2

What is the formula for calculating volume in a circular tank

Answer 2

V = r² x H

(Volume = radius squared times height)

Question 3

What is the formula for calculating a rectangular tank

Answer 3

V = L x W x H

(Volume = Length x Width x Height)

Question 4

What is the formula for calculating Rate of Flow (Q)

Answer 4

Q = Vel x A

Rate of Flow = Velocity x Area

Question 5

How much natural alkalinity would be consumed by a dose of 20 mg/l of alum

Answer 5

10 mg/l

Question 6

1.0 mg/l of alum reacts with how much alkalinity?

Answer 6

0.5 mg/l

(Half)

Question 7

During disinfection, 99.9% of the micro organisms were destroyed. What log reduction was achieved?

Answer 7

3 log

(0.001 parts of the initial 1.000 remain)

Question 8

What is the log reduction of a 99% destruction of micro-organisms?

Answer 8

2 log

(0.01 of the initial 1.00 parts remain)