Unit 22 - Chapter 96

Question 0

When air is forced through a heating coil, where the fan and cool are within the same unit, the unit is known as

Answer 0

A unit heater

Question 1

Convectors use ___ to increase heat transfer

Answer 1

Metal fins

Question 2

A radiator trap is a device used to

Answer 2

Allow only water to leave the radiator

Question 3

The exhausted on an air separation tank consists of a series of ___ through which water is forced by the pump

Answer 3

Nozzles

Question 4

Which of the following pieces of equipment is not a source of heat?

Answer 4

Air vent

Question 5

Unit heaters differ from convectors in that they use ___ to increase heat transfer

Answer 5

Blowers

Question 6

Radiators can be classified as

Answer 6

Wall hung, floor, leg less, and window

Question 7

In fun coil type heaters, individual room temperature is controlled by

Answer 7

Dampers

Question 8

Unit ventilators use

Answer 8

A mixture of inside and outside air

Question 9

The difference between a convector and a radiator is

Answer 9

That one is made from cast iron and the other from steel or copper

Question 10

Large areas such as warehouses, are usually heated with

Answer 10

Unit heaters

Question 11

Air can be remove from steam heating systems by

Answer 11

Air vents

Question 12

A radiator valve is used to control the amount of

Answer 12

Steam entering the radiator

Question 13

The vacuum pump performs the following function

Answer 13

Returns the condensate back to the boiler

Question 14

The level in the condensate receiver is automatically controlled by a

Answer 14

Float switch

Question 15

The purpose of a radiator trap is to

Answer 15

Drain condensate from the radiator

Question 16

Air vents are used to

Answer 16

Expel the air from heating systems

Question 17

The purpose of a radiator trap is to

Answer 17

Pass condensate and retain steam in the radiator

Question 18

An __ is used to expel air from the risers and main headers of the steam heating system

Answer 18

Automatic air vent

Question 19

Another name for a unit ventilator is

Answer 19

Univent

Question 20

Radiators can be classified as

Answer 20

Wall hung, floor, and window

Question 21

Older radiators are usually made of

Answer 21

Cast iron

Question 22

An air vent is partially filled with volatile liquid so that

Answer 22

When relatively cool air surrounds the cylinder, it causes the needle valve to open

Question 23

Push nipples

Answer 23

Connect radiator sections together

Question 24

Hand operated pet cocks for expelling air from heating systems have been superseded by

Answer 24

Automatic air vents

Question 25

A radiator valve is used to control the amount if

Answer 25

Steam entering the radiator

Question 26

___ are often used to air the return of condensate through the return piping of large complexes

Answer 26

Vacuum pumps

Question 27

Radiators and convectors should be placed

Answer 27

Against outside walls