Book 2: 1-02 - "Steam Heating Equipment"

Question 1

The presence of air in a steam heating system is undesirable since it will:
Select one:

A. Decrease the condensate flow

B. Increase the condensate load

C. Increase the heat transfer

D. Block the free flow of steam

E. Increase the steam flow

Answer 1

D. Block the free flow of steam

Question 2

The type of trap commonly used with radiators or convectors is the _____ trap with either corrugated bellows or disc.
Select one:

A. Thermodynamic

B. Thermostatic

C. Ball float

D. Inverted bucket

E. Impulse

Answer 2

B. Thermostatic

Question 3

The radiator trap is a device that allows the condensate to be discharged from the radiator but prevents any _____ from discharging.
Select one:

A. Carbon dioxide

B. Steam

C. Condensate

D. Non-condensable gases

E. Air

Answer 3

B. Steam

Question 4

A unit heater is a convector heater that employs _____ to force the air across the heating coil.
Select one:

A. Differential pressure

B. A pump

C. A turbocharger

D. A blower or fan

E. Natural convection

Answer 4

D. A blower or fan

Question 5

In many steam heating systems the condensate discharged by the steam traps from the heating equipment drains by gravity into a:
Select one:

A. Deaerator

B. Sump

C. Hotwell

D. Drain

E. Condensate receiver

Answer 5

E. Condensate receiver

Question 6

Radiators may be classified as _____ type.
Select one:

A. Vertical

B. Airless

C. Horizontal

D. Floor

E. Flooded

Answer 6

D. Floor

Question 7

The presence of air in a steam heating system is undesirable since it will:
Select one:

A. Cause the relief valve to fail

B. Reduce the heat transfer

C. Increase the steam flow

D. Reduce the operating pressure

E. Decrease the condensate flow

Answer 7

B. Reduce the heat transfer

Question 8

A unit ventilator may also be called a:
Select one:

A. Univent

B. Convector

C. Unicorn

D. Radiator

E. Fin coil

Answer 8

A. Univent

Question 9

Radiators may be classified as _____ type.
Select one:

A. Flooded

B. Vertical

C. Airless

D. Horizontal

E. Window

Answer 9

E. Window

Question 10

The exhauster consists of a series of _____ through which water is forced by the vacuum pump.
Select one:

A. Nozzles

B. Orifices

C. Pipes

D. Orifices

E. Venturis

Answer 10

A. Nozzles

Question 11

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

A. Convection

B. Conduction

C. Ventilation

D. Radiation

E. Humidification

Answer 11

A. Convection

Question 12

The air vent consists of a small housing containing a sealed cylinder that is partially filled with _____, to which a needle valve is attached.
Select one:

A. Air

B. Oil

C. Water

D. A volatile liquid

E. Steam

Answer 12

D. A volatile liquid

Question 13

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

A. Space heater

B. Hot air furnace

C. Unit heater

D. Ventilator

E. Convector

Answer 13

E. Convector

Question 14

Modern radiators are made of:
Select one:

A. Cast iron

B. Aluminum

C. Magnesium

D. Light steel pressings welded together

E. Copper

Answer 14

D. Light steel pressings welded together

Question 15

Unit ventilators are often equipped with three-speed switches used to regulate the:
Select one:

A. Flow of the water

B. Rate of ventilation

C. Position of the damper

D. Speed of the fan

E. Flow of the steam

Answer 15

D. Speed of the fan

Question 16

Older radiators were made of cast iron and built in sections which were connected by means of:
Select one:

A. Bolts

B. Tie rods

C. Screw or push nipples

D. Welded flanges

E. Clamps

Answer 16

C. Screw or push nipples

Question 17

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

A. Radiated

B. Conducted

C. Humidified

D. Ventilated

E. Constructed

Answer 17

A. Radiated

Question 18

The presence of air in a steam heating system is undesirable since it will:
Select one:

A. Increase heat transfer beyond design

B. Promote corrosion in the system

C. Contaminate the makeup water

D. Increase the steam flow

E. Decrease the condensate pressure

Answer 18

B. Promote corrosion in the system

Question 19

Attached to the tube of the convector are metal fins that serve to _____ transfer from the tube to the air circulating passed the convector.
Select one:

A. Restrict air

B. Increase the heat

C. Decrease the heat

D. Increase the temperature

E. Decrease the temperature

Answer 19

B. Increase the heat

Question 20

Packless radiator valves have a _____ diaphragm that completely seals off the valve body to prevent steam from leaking out around the valve stem.
Select one:

A. Bronze

B. Steel

C. Copper

D. Lead

E. Plastic

Answer 20

A. Bronze