Quiz 4 And 5

Question 1

Fires that involve energized electrical equipment.

Answer 1

Class C fires

Question 2

Fires in ordinary combustible materials such as wood, paper, cloth and many plastics.

Answer 2

Class A fires

Question 3

Fires in combustible metals such as magnesium, titanium, sodium, lithium, and potassium

Answer 3

Class D fires

Question 4

Fires that involve cooking oils, animal fats or grease (kitchen fires).

Answer 4

Class K fires

Question 5

Fires that involve flammable and combustible liquids and gases such as gasoline and paints.

Answer 5

Class B fires

Question 6

Which of the following refrigerant safety classifications has the highest flammability rating?

Answer 6

A3

Question 7

Which DOT marking signifies that the recovery cylinder is rated to hold R-410A refrigerant?

Answer 7

4BA400 and 4BW400

Question 8

Used to measure air distribution system leakage

Answer 8

Duct pressure test

Question 9

Used to measure supply/return air volumes

Answer 9

Flow hood

Question 10

To determine if the oil in a vacuum pump is good enough to pull a deep vacuum, what tool would you use to check the oil?

Answer 10

Micron gauge

Question 11

A single vacuum pump rated at 5 CFM can be used on a system rated up to how many Btus?

Answer 11

300,000

Question 12

How many amps will a circuit draw if the total resistance of all loads in the circuit is 300
ohms, and the power supply is 120V? (Volts = Amps x Resistance) (E= 1 x R)

Answer 12

0.4 amps