The vacuum pump performs the following function:

The vacuum pump performs the following function:

a) supplies water to the condensate receiver
b) supplies steam to the boiler
c) returns the condensate (water) back to the boiler
d) returns the condensate water to the condensate receiver
e) none of the above






Answer: C

Air can be removed from steam heating systems by

Air can be removed from steam heating systems by

a) air vents
b) a steam trap
c) an air separator
d) an air header
e) a dip tube





Answer: A

Convectors use ________ to increase heat transfer.

Convectors use ________ to increase heat transfer.

a) metal fins
b) radiators
c) blowers
d) copper tubes
e) brass tubes

Answer: A

The difference between a convector and a radiator is:

The difference between a convector and a radiator is:

a. The convector uses fans
b. The radiator's fins are much larger
c. The radiator is controlled by a thermostat
d. That one is made of cast iron and the other of steel or copper
e. The radiator is a compact design.






Answer: D

One of the main considerations in the construction of radiators suitable for steam heating systems is:

One of the main considerations in the construction of radiators suitable for steam heating systems is:

a. Large heating surface area
b. Ruggedness
c. Attractiveness
d. Modern in appearance
e. Light weight





Answer: A

Modern radiators are usually made of:

Modern radiators are usually made of:

a. Steel
b. Cast iron
c. Stainless steel
d. Copper
e. Brass





Answer: A

A radiator valve is used to control the amount of:

A radiator valve is used to control the amount of:

a. Air leaving the radiator
b. Condensate leaving the radiator
c. Steam leaving the radiator
d. Air entering the radiator
e. Steam entering the radiator







Answer: E

Radiators can be classified as:

Radiators can be classified as:

a. Floor, window or ceiling
b. Window, duct or floor
c. Wall-hung, floor, and window
d. Legless, ductless and floor
e. Cast iron, steel and copper







Answer: C

In newer steam heating systems, the condensate discharged by the steam traps, convectors, or other heating equipment, drains by gravity through the return piping to:

In newer steam heating systems, the condensate discharged by the steam traps, convectors, or other heating equipment, drains by gravity through the return piping to:

a. The boiler
b. A condensate tank
c. The condensate scrubber
d. The deaerator
e. The vacuum pump






Answer: B

Another name for a unit ventilator is:

Another name for a unit ventilator is:

a. Radiator
b. Exhauster
c. Convector
d. Register
e. Univent

Answer: E

The radiator trap is a device that allows:

The radiator trap is a device that allows:

a. Debris to collect
b. Steam to collect
c. Water and steam to collect
d. Steam to be discharged from the radiator, but prevents water from discharging
e. Water to be discharged from the radiator, but prevents steam from discharging





Answer: E

The level in the condensate receiver may be automatically controlled by a:

The level in the condensate receiver may be automatically controlled by a:

a. Float switch
b. Pressure reducing valve
c. Gate valve
d. Drain valve
e. Sight glass






Answer: A

Older radiators were usually made of:

Older radiators were usually made of:

a. Steel
b. Cast iron
c. Stainless steel
d. Copper
e. Brass






Answer: B

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

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

a. Metal fins
b. Natural circulation
c. Blowers
d. Copper tubes
e. Brass tubes






Answer: C

_____ are often used to aid the return of condensate through the return piping of large complexes.

_____ are often used to aid the return of condensate through the return piping of large complexes.

a. Boiler feed pumps
b. Vacuum injectors
c. Pressure controls
d. Vacuum pumps
e. Vacuum breakers






Answer: D

When air is forced through a heating unit that contains both the fan and coil, the unit is called:

When air is forced through a heating unit that contains both the fan and coil, the unit is called:

a. A unit heater
b. An injector
c. An induction unit
d. A unit ventilator
e. A convector






Answer: A

Older radiators were usually made of:

Older radiators were usually made of:

a. Steel
b. Cast iron
c. Stainless steel
d. Copper
e. Brass





Answer: B

Unit ventilators :

Unit ventilators :

a. do not filter the air
b. do not provide fresh air
c. do not use fans to circulate air
d. mix outside and inside air.
e. do not contain heating coils






Answer: D

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

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

a. Switches
b. Automatic valves
c. Dampers
d. Air relays
e. Supply ducts





Answer: C

The packless radiator valve has a bronze diaphragm that completely seals off the valve body, to prevent:

The packless radiator valve has a bronze diaphragm that completely seals off the valve body, to prevent:

a. Air from entering the radiator
b. Condensate accumulation in the valve body
c. Air leaking out around the valve stem
d. Steam leaking out around the valve stem
e. Differential pressure from changing the valve setting






Answer: D