Which of the following conditions will allow current to flow through a circuit?

For current to flow through a wiring system there must be:

The voltage reading across an open switch of an energized electrical circuit should be:

The current required to operate a device rated for 1500 watts at 120 volts is:

If a circuit is wired so that electrons can flow in only one possible path, the circuit is said to be a/an:

In a parallel circuit containing a 3 ohm 2ohm 7ohm 8ohm and a 10ohm resistor, the current flow is:

With the fuse removed from the circuit, the resistance reading across a blown fuse will be:

Which of the following statements concerning electrical conductors is correct?

Equipment wiring diagrams indicate which of the following?

Equioment specifications indicate mainlv:

The word "symptom" is used in manufacturers' literature to describe:

A "bill of materials" is a:

To correct a symptom such as a fluctuating flame, a technician should first:

If the scale on a mechanical drawing is 1/8" - 1'0" then a line measuring 4" in length is actually:

Mechanical drawings are used to

Equipment service bulletins are normally issued by the:

On a roof with a 10/12 pitch, and a wall 4 feet high and 6 feet away from the vent opening, what is the minimum vent height for a category one propane-fired appliance?

On a roof with a 12/12 pitch and no obstructions, the minimum vent height for a natural gas fired appliance is:

The B149.1-05 Code is used to determine:

Venting and air supply requirements are in section_____of the b149.1 code

All furnace appliance manufacturers' literature gives the name of the manufacturer, the:

A broken or dotted line on a manufacturer's wiring diagram normally indicates:

Safety directives and bulletins are issued by the:

If a 1/2 cubic foot test dial makes one complete revolution in 18 seconds, the input is:

If the appliance manual shut off valve is in the closed position, movement of the 1/2 cu. ft. test dial indicates:

The diameter of a drip or dirt pocket shall be equal to the diameter of the piping or tubing that it serves. or

Steel piping used in gas installations shall comply with:

If a branch piping outlet is installed in the main supply piping before it is known what size of piping is going to be connected to it, what size should the outlet be?

The fittings used to protect pipe threads during shipment are not allowed to be used in installations because they:

For a piping system supplying an appliance having a rated input under 400,000 Btuh (120 kW), the supply line and branch line to the appliance may be purged:

Which of the following statements is correct?

What is the maximum horizontal spacing of supports for NPS 1 1/4 inch gas pipe in a home?

Hose used to connect the propane supply to a domestic water heater shall.

What is the maximum allowable length of corrugated flexible connector when it is used to connect a suspended appliance to piping or tubing?

No one may initially activate a 300,000 Btu input appliance connected to a piping system:

An orifice for a propane appliance with the same input as a natural gas appliance is:

Boilers transfer heat to water through:

A recessed wall furnace may use which of the following?

The purpose of a burner in a forced air furnace is to:

An indication of excessive primar air is a:

Infrared heaters may not be used in:

If the gas / air velocity is too great at the port of an atmospheric burner, the flame will have a tendency to:

An appliance which incorporates a glow bar has a_______ ignition system

Most underfired storage water heater temperature controls utilize:

The configuration of a "Hi Boy" forced air gas furnace has:

if the return and supply air plenum are both located on the top of the furnace, the furnace is a°

A surface combustion infrared heater requires:

The purpose of the high limit switch found on many gas-fired appliances is to:

What is TEMPERATURE RISE in a forced warm air furnace?

Conduction is:

Decorative appliances to be installed in vented fireplaces mounted on a grating system - are usually referred to as

Infrared and tube heaters transfer heat by.

Gas piping requirements are in section_______ of the B149.1-05 code.

The required pipe size for section 'E' of the main supply line is

The required pipe size for section 'G' of the main supply line is:

The required pipe size for section 'K' of the main supply line is:

The required pipe size for section 'B' of the sub-supply line is:

The required pipe size for the branch lines supplying the unit heaters is:

The required pipe size for sections 'D' and 'M' supplying the boilers is:

The required pipe size for the branch line supplying the duct furnace is: