WorksheetsModule 1 Quiz HVAC 123
Total questions: 25
Worksheet time: 13mins
Which fitting is used to change the direction of flow in a piping system?
Coupling
Elbow
Union
Reducer
Which fitting allows easy disconnection of pipes for maintenance?
Tee
Elbow
Union
Nipple
Pressure fittings are mainly designed to:
Carry wastewater only
Withstand internal pressure
Be used only underground
Prevent corrosion
Drainage fittings differ from pressure fittings because they:
Are thicker
Operate without internal pressure
Are always threaded
Are made of copper only
Which fitting connects pipes of different diameters?
Tee
Elbow
Reducer
Cap
Pressure rating refers to the:
Maximum temperature a pipe can handle
Maximum safe working pressure of a pipe
Thickness of pipe walls
Length of pipe
Burst strength is best defined as the:
Normal operating pressure
Pressure at which a pipe fails
Pressure loss due to friction
Internal flow rate
A pipe should normally operate at:
Its burst pressure
Half of its burst pressure
A pressure below its rated pressure
Any pressure level
Higher pipe wall thickness generally results in:
Lower burst strength
Higher burst strength
No effect on strength
Lower pressure rating
Pressure ratings are important mainly for safety and:
Appearance
Cost reduction
System reliability
Pipe color selection
Thermal expansion occurs when a pipe:
Is under pressure
Is cooled
Is heated
Is corroded
Copper pipes expand primarily due to changes in:
Pressure
Temperature
Pipe length
Pipe diameter
Which device is commonly used to accommodate pipe expansion?
Elbow
Expansion loop
Reducer
Union
Failure to allow for expansion may cause:
Improved efficiency
Pipe distortion or damage
Reduced pipe length
Lower pressure rating
Soldering is typically performed at temperatures:
Above 840°F (450°C)
Below 840°F (450°C)
Above 1,000°C
At room temperature
Brazing differs from soldering because brazing:
Uses lower temperature
Produces weaker joints
Uses higher temperature
Requires no filler metal
Which joint is stronger?
Soldered joint
Brazed joint
Threaded joint
Compression joint
Brazing is commonly used in HVAC systems because it:
Is cheaper
Is easier
Produces high-strength, leak-proof joints
Requires no heat
Which material is commonly used as filler in soldering copper pipes?
Steel rod
Lead-based alloy
Tin-based alloy
Aluminum wire
Copper piping is widely used in plumbing because it is:
Cheap
Flexible
Corrosion-resistant and durable
Non-metallic
Refrigeration and air-conditioning systems require joints that are:
Decorative
Low-temperature only
Pressure- and leak-resistant
Easily detachable
Medical gas systems require piping that is:
Painted internally
Corrosion-resistant and contamination-free
Plastic-lined
Low-pressure only
Fire sprinkler systems require pipes that can:
Withstand high pressure and heat
Expand freely without support
Be lightweight only
Operate without fittings
Solar heating systems commonly use copper because of its:
Color
Electrical insulation
High thermal conductivity
Low melting point
Copper has good corrosion resistance because it:
Rusts easily
Forms a protective oxide layer
Is coated with paint
Is non-metallic
