Book 2: Unit 1 - Review:

Question 1

Conduction heat gains are based on the assumption that the temperature of the outer surface of the building is the same as the:
Select one:

A. Average of winter and summer temperatures

B. Outdoor design condition

C. Warmest summer temperature

D. Indoor design temperature

E. Coldest winter temperature

Answer 1

B. Outdoor design condition

Question 2

Some heat is also _____ from the warm convector cabinet surface.
Select one:

A. Radiated

B. Constructed

C. Conducted

D. Ventilated

E. Humidified

Answer 2

A. Radiated

Question 3

In the series loop hot water heating system, the heating units are:
Select one:

A. All supplied with water at the same temperature and the return from each convector flows by the shortest and most direct route back to the boiler

B. Equipped with its own circulating pump

C. All supplied with water at the same temperature and the return from each convector flows the long way around to return to the boiler

D. Supplied from the main and the return from each convector is connected back to the main again downstream from the supply connection

E. Connected in series so the water circulates from the hot water supply main directly through all the convectors to the return main

Answer 3

E. Connected in series so the water circulates from the hot water supply main directly through all the convectors to the return main

Question 4

The piping and heating units of a steam heating system must be so arranged that:
Select one:

A. Steam can flow in sufficient quantities to all heating units

B. The condensate can be returned freely to these units

C. The air can be contained in the heating units and piping

D. The condensate can flow freely from the boiler

E. Steam can flow freely from all heating units

Answer 4

A. Steam can flow in sufficient quantities to all heating units

Question 5

Activated alumina chemisorbant is particularly suitable for the removal of:
Select one:

A. N2

B. CO2

C. CO

D. H2S

E. O2

Answer 5

D. H2S

Question 6

The _____ outlets should be located to prevent cold drafts from walls and windows and to maintain even temperatures in the rooms.
Select one:

A. Plenum

B. Register

C. Supply

D. Grille

E. Return

Answer 6

C. Supply

Question 7

The natural air intake mechanical exhaust system of ventilation has the disadvantage that the fresh air drawn into the building through windows:
Select one:

A. Is neither filtered nor heated

B. Enters silently

C. Is natural and no power is required

D. Provides a cooling breeze

E. Is fresh air

Answer 7

A. Is neither filtered nor heated

Question 8

Modern radiators are made of:
Select one:

A. Light steel pressings welded together

B. Aluminum

C. Cast iron

D. Magnesium

E. Copper

Answer 8

A. Light steel pressings welded together

Question 9

Building heat losses can be reduced to a large extent by adding a layer, or layers, of:
Select one:

A. Building wrap

B. Paint

C. Insulation

D. Wall paper

E. Glass

Answer 9

C. Insulation

Question 10

The admission of fresh air into a room should be such that:
Select one:

A. The air strikes directly on the occupants

B. The air is spread over the ceiling area

C. Stagnant pockets of air are created

D. The air is spread over the floor area

E. The air does not strike directly on the occupants

Answer 10

E. The air does not strike directly on the occupants

Question 11

An outdoor thermostat should be incorporated in the control system to protect the snow melting system from accidental operation during warm weather, by turning the system off when outdoor ambient temperature rises above:
Select one:

A. 15°C (59°F)

B. 2°C (35.6°F)

C. 10°C (50°F)

D. 5°C (41°F)

E. 0°C (32°F)

Answer 11

B. 2°C (35.6°F)

Question 12

A steam to hot water heating converter is usually a _____ heat exchanger.
Select one:

A. Convector

B. Fire tube

C. Shell and tube

D. Radiator

E. Water tube

Answer 12

C. Shell and tube

Question 13

A fin coil consists of one or more rows of parallel tubes fitted with fins to _____ exchange.
Select one:

A. Increase the flow rate

B. Increase the temperature

C. Decrease the rate of heat

D. Decrease the temperature

E. Increase the rate of heat

Answer 13

E. Increase the rate of heat

Question 14

When dealing with electrical controls relay refers to:
Select one:

A. A device used to change AC voltage from one value to another

B. A term that refers to wiring or other electrical devices using 30 volts or less

C. A device consisting of a solenoid coil, which operates load carrying contacts when the coil is energized

D. A term that refers to the normal electric supply voltage

E. The electric switch configuration of a relay

Answer 14

C. A device consisting of a solenoid coil, which operates load carrying contacts when the coil is energized

Question 15

One of the advantages of a forced warm air heating system is:
Select one:

A. The ducts can not be enclosed within walls and ceilings

B. The furnace must be located on the same floor

C. A more uniform temperature distribution can be obtained

D. The air can not be humidified

E. The air can not be cleaned by filters

Answer 15

C. A more uniform temperature distribution can be obtained

Question 16

In modern installations the cast-iron radiator has largely been replaced by the:
Select one:

A. Space heater

B. Ventilator

C. Hot air furnace

D. Convector

E. Unit heater

Answer 16

D. Convector

Question 17

In buildings covering large areas the resistance to flow of the condensate in the return piping is quite high and _____ pumps are often used to assist the condensate flow.
Select one:

A. Centrifugal

B. Lobe

C. Turbine

D. Vacuum

E. Positive displacement

Answer 17

D. Vacuum

Question 18

In the convector air circulates naturally without the aid of a fan a process that is called:
Select one:

A. Humidification

B. Convection

C. Conduction

D. Ventilation

E. Radiation

Answer 18

B. Convection

Question 19

The admission of fresh air into a room should be such that:
Select one:

A. The air is spread evenly over the whole area

B. The air is spread over the floor area

C. The air strikes directly on the occupants

D. Stagnant pockets of air are created

E. The air is spread over the ceiling area

Answer 19

A. The air is spread evenly over the whole area

Question 20

A good rule of thumb for determining the proper tension of driving belts on blowers less than 1 kW in warm air furnaces is that for every 16 cm (6.3 in) of distance between the pulley rims, the belt should have about _____ of vertical movement when pushed vertically halfway between the pulleys.
Select one:

A. 0.5 cm (0.2 in)

B. 1.5 cm (0.6 in)

C. 1 cm (0.4 in)

D. 2 cm (0.8 in)

E. 2.5 cm (1 in)

Answer 20

C. 1 cm (0.4 in)