25 Questions
What type of joint is designed to be buried in the ground?
A joint designed to be buried in the ground
What is a characteristic of a joint made by welding, soldering, brazing or appropriate compression tool?
It is not accessible for inspection
What does the symbol (MF) indicate on a product?
It is a maintenance-free accessory
What is an exception to the accessibility requirement for inspection, testing, and maintenance?
A connection between a cold tail and the heating element
What is true about equipment complying with BS 5733 and marked with the symbol (MF)?
It is installed in accordance with the manufacturer's instructions
What type of connector is used in high-temperature applications?
Porcelain connectors
What is a crucial factor in selecting termination points?
Current rating
Where are porcelain connectors often found?
Appliances and luminaries
What type of terminal is used to connect fixed wiring to a totally enclosed fitting?
Porcelain connector
What is the purpose of a claw washer?
To secure a screw head
What is the process of erosion?
The wear away of solids due to friction or movement
What can cause sparking and flashing in contacts?
Faulty and high resistance contacts
What happens to contacts when they open and close?
They may become worn
What is a result of erosion?
The loss of material
What is a primary requirement for every connection between conductors or between a conductor and other equipment?
To provide durable electrical continuity and adequate mechanical strength and protection
What type of contacts can cause surges?
Faulty and high resistance contacts
What factor should be considered when selecting the means of connection?
The material of the conductor and its insulation
Why is it necessary to consider the temperature attained at the terminals in normal service?
To prevent the insulation from being damaged
What is a specific consideration for soldered connections?
The design should take account of creep, mechanical stress, and temperature rise under fault conditions
What is a common characteristic of terminals without the marking R, F, S, or Sol?
They can be used with all types of conductors
Why is it necessary to provide adequate locking arrangements in certain situations?
To prevent the connection from coming loose due to vibration or thermal cycling
What type of conductor is marked with an 'R'?
Rigid Conductor
What type of conductor is marked with an 'F'?
Flexible Conductor
What type of conductor is marked with an 'S' or 'Sol'?
Solid Conductor
What is true about terminals with specific markings (R, F, S, or Sol)?
They can only be used with the marked type of conductor
This quiz covers the exemptions for accessible connections in heating systems, including buried joints, compound-filled joints, and more.
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