Unit 21 - Chapter 91

Question 0

Before atomization can occur heavy oil are heated to

Answer 0

95’C

Question 1

The reducing of oil into very small particles is termed

Answer 1

Atomization

Question 2

An air atomizing burner utilizes an air pressure of

Answer 2

100 kPa

Question 3

The capacity of a constant capacity mechanical atomizer is a function of

Answer 3

Orifice size

Question 4

A modulating pressure atomizer has its return oil flow regulated by

Answer 4

Modulating valve in the return line

Question 5

To which of the following oil burners is the oil supplied under high pressure?

Answer 5

Mechanical atomizing burner

Question 6

When using mechanical fuel oil atomization

Answer 6

High pump pressure is required

Question 7

Oil burner can be divided into three classes

Answer 7

1. Air and steam atomizing burners
2. Mechanical or pressure atomizing burners
3. Centrifugal or rotary cup burners

Question 8

The compressed air used as atomizing air in the oil burner is called

Answer 8

Primary air

Question 9

The two basic varieties of mechanical atomizing oil burners

Answer 9

1. Constant capacity burner

2. Modulating burner

Question 10

A multiburner cluster has secondary and tertiary nozzles ignited by

Answer 10

The primary burner

Question 11

When a greater than normal amount of combustible mixture is ignited by the result may be

Answer 11

A puff back

Question 12

A fuel filter consists of

Answer 12

Three main parts

Question 13

Burner light oil supply pressure range is approximately

Answer 13

550 to 700 kPa

Question 14

A relief valve is placed on the discharge of a fuel oil pump

Answer 14

So burner design pressure is not exceeded

Question 15

A time delay oil valve

Answer 15

Opens once ignition is verified

Question 16

In order to prevent the possibility of a furnace explosion it is important that the furnace is ___ before the igniter is energized and fuel is supplied to the burner nozzles

Answer 16

Purged

Question 17

Intermediate and high fire burner nozzles have higher capacities than the primary burner nozzle

Answer 17

To allow better boiler warm ups

Question 18

Oil flow rate to a modulating burner is regulated by

Answer 18

A return line modulating valve

Question 19

The minimum distance from furnace to oil storage tank is

Answer 19

2.1 m

Question 20

Maximum static pressure in a fuel oil line is approximately

Answer 20

70 kPa