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
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Power Engineering Chapter 96
- The vacuum pump performs the following function:
- Air can be removed from steam heating systems by
- Convectors use ________ to increase heat transfer.
- The difference between a convector and a radiator is:
- One of the main considerations in the construction of radiators suitable for steam heating systems is:
- Modern radiators are usually made of:
- A radiator valve is used to control the amount of:
- Radiators can be classified as:
- 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:
- Another name for a unit ventilator is:
- The radiator trap is a device that allows:
- The level in the condensate receiver may be automatically controlled by a:
- Older radiators were usually made of:
- _____ are often used to aid the return of condensate through the return piping of large complexes.
- When air is forced through a heating unit that contains both the fan and coil, the unit is called:
- Older radiators were usually made of:
- Unit ventilators :
- In fin coil type heaters, individual room temperature is controlled by
- The packless radiator valve has a bronze diaphragm that completely seals off the valve body, to prevent:
- An air vent is partially filled with volatile liquid so that:
- Unit ventilators are:
- Hand operated pet cocks for expelling air from heating systems have been superseded by:
- Large areas, such as warehouses, are usually heated by: