113-sentralen svarer raskt.

It refers to the 113 emergency call center in Norway, specifically the medical emergency dispatch service.

In Norway, 113 is the emergency number for ambulance/medical emergencies, so 113-sentralen is the center that handles those calls.

Because Norwegian often puts the definite article at the end of the noun instead of using a separate word.

• sentral = center
• sentralen = the center

So 113-sentralen literally works like the 113 center.

The hyphen is used because a number is being joined to a noun to make a compound.

This is very common in Norwegian:

• 17. mai-tog
  = 17th of May parade
• TV-serie = TV series
• 113-sentralen = the 113 center

So the hyphen helps connect the number and the noun clearly.

Svarer is the present tense of å svare = to answer / to reply.

So:

• å svare = to answer
• svarer = answers / is answering

In Norwegian, the present tense usually ends in -r for many verbs.

Because here the word describes how the answering happens, so it functions as an adverb: quickly.

• rask = quick / fast
• raskt = quickly / fast

So:

• en rask bil = a fast car
• bilen kjører raskt = the car drives fast

In your sentence, raskt modifies the verb svarer, so raskt is the correct form.

Here it is being used adverbially, because it describes the verb svarer.

That said, Norwegian adverbs are often identical in form to the neuter adjective form. So learners often first meet raskt as the neuter form of rask, but in this sentence its job is adverbial.

A simple way to remember it:

• describing a noun → adjective
• describing a verb → adverb

This is the normal Norwegian main-clause order:

subject + verb + adverb

So:

• 113-sentralen = subject
• svarer = verb
• raskt = adverb

This is very similar to English:

• The 113 center answers quickly

Yes. Norwegian often leaves the object unstated when it is obvious from context.

So 113-sentralen svarer raskt naturally means something like:

• the 113 center answers quickly
• the 113 center responds quickly

The listener understands that this means they answer calls quickly.

In this context, it is very often read digit by digit as en-en-tre.

So 113-sentralen would commonly be understood as:

• en-en-tre-sentralen

That is especially natural because emergency numbers are often said as separate digits.

It can mean both, depending on context.

In a sentence like this, svarer can be understood as:

• answers quickly
• responds quickly

With an emergency call center, both ideas fit well. The exact English word depends on what sounds most natural in the translation you were given.

Yes. Norwegian present tense can cover both:

• answers quickly
• is answering quickly

Usually, context tells you which English version sounds best. Without extra context, the Norwegian sentence is simply a general present-tense statement.