Chief 4

Question 1

Magnesium sulfate is the substance that would cause caustic embrittlement in a boiler

Answer 1

F

Question 2

It is possible to operate a steam heating system with a pressure mower than atmospheric pressure

Answer 2

T

Question 3

To determine the amount of heat loss through a particular type of construction the coefficient of heat transmission is expressed as the u factor

Answer 3

T

Question 4

The capacity of a cast iron radiator is indicated to be EDR

Answer 4

T

Question 5

Fuel oil additives are used to prevent flame impingement

Answer 5

F

Question 6

The total head of a pump is calculated by adding the suction lift and the suction head

Answer 6

F

Question 7

Speed regulation is very poor on a series wound motor

Answer 7

T

Question 8

Complete air conditioning means heating cooling humidifying and dehumidifying circulating and cleaning the air

Answer 8

T

Question 9

The latent heat of fusion is 144 BTUs

Answer 9

T

Question 10

If you wanted to double the speed of a fan you would need a motor

Answer 10

Eight times as large

Question 11

What should be the differential and temperature between the cooler and the ammonia in the pipes of an ammonia compressed compression system

Answer 11

10° f

Question 12

The device used to cool the air compressor of the service station type would be

Answer 12

Finned heads

Question 13

in order to employ on UltraViolet flame detection system which of the following chemicals must be present in the fuel being burned

Answer 13

Hydrogen

Question 14

How many drums in a d-type

Answer 14

2

Question 15

Which of the following refrigerants requires the greater displacement to produce one ton of refrigeration

Answer 15

Ccl2f2

Question 16

What determines the refrigerating capacity of a NH3 compressor

Answer 16

The cylinder size

Question 17

The proper amount of CO2 when using number six oil is

Answer 17

14%

Question 18

The slope in a brick set HRT boiler is usually

Answer 18

1 to 3 inches

Question 19

Which of the following ammonia evaporators has the highest transfer rate

Answer 19

Completely flooded

Question 20

What is the difference between a tube and a flu in on HRT boiler

Answer 20

Tubes are smaller than 4 in flues are larger than 4 in

Question 21

Under what conditions does the New York State boiler code permit valves in the steam and water connections to the water column

Answer 21

When locked open where long runs occur

Question 22

What is the meaning of relative humidity and absolute humidity

Answer 22

Relative to what the air can hold in percent, absolute actual about the air can hold in gpg

Question 23

What prevents steam from flowing back to the vacuum pump on a vacuum return heating system

Answer 23

Steam traps

Question 24

Name two reasons which would cause a centrifugal pump to fail to pump water

Answer 24

Wants her too hot high slip due to wear to high lift

Question 25

If water is said to be hard what two chemicals would likely be found in the water

Answer 25

Calcium and magnesium

Question 26

Name two common types of starters on AC motors

Answer 26

Drum starters centrifugal switches capacitors

Question 27

What is meant by the term heat loss

Answer 27

Heat leaks

Question 28

Why is this useful to heating engineers

Answer 28

Used to calculate furnace size

Question 29

Where and on what type of boiler would a girth superheater be installed

Answer 29

HRT horizontal return tubular

Question 30

If a pump has no slip what would be the efficiency

Answer 30

100%