Ovlašteni projektant provjerava prostor oko izmjenjivača.

Because ovlašteni is an adjective describing projektant, and it has to agree with that noun in:

• gender: masculine
• number: singular
• case: nominative

So:

• ovlašteni projektant = authorized / licensed designer-engineer

The ending -i here is the normal masculine singular nominative ending for this type of adjective.

Projektant is a technical/professional word. In everyday English, it can often be translated as:

• designer
• design engineer
• project designer

In technical, construction, or engineering contexts, projektant usually means the person responsible for preparing or designing a project, plan, or technical solution. It is not usually the same as the English word project manager.

Grammatically, projektant is:

• a masculine noun
• here in the nominative singular, because it is the subject of the sentence

Provjerava is:

• 3rd person singular
• present tense
• from the verb provjeravati (imperfective)

So it means:

• he/she checks
• is checking
• checks regularly, depending on context

In technical or formal writing, Croatian often uses the present tense to describe a standard procedure or professional duty. So this sentence can sound like:

• The authorized designer checks the area around the exchanger
• or The authorized designer is checking the area around the exchanger

depending on the broader context.

Prostor is the direct object of provjerava, so it is in the accusative singular.

But prostor is a masculine inanimate noun, and for many masculine inanimate nouns in Croatian:

• nominative singular = accusative singular

So:

• nominative: prostor
• accusative: prostor

That is why the form does not visibly change.

Because the preposition oko requires the genitive case.

So:

• base form: izmjenjivač
• genitive singular: izmjenjivača

That gives:

• oko izmjenjivača = around the exchanger

This is a very important pattern to remember:

• oko + genitive

Other examples:

• oko kuće = around the house
• oko stola = around the table

It is genitive singular.

The dictionary form is:

• izmjenjivač = exchanger

In this sentence, after oko, it becomes:

• izmjenjivača

So the structure is:

• oko
  • genitive

Izmjenjivač is a technical noun meaning exchanger.

In many engineering contexts, especially HVAC, plumbing, or energy systems, it often refers to a:

• heat exchanger (izmjenjivač topline)

If the fuller context is already clear, Croatian may simply say izmjenjivač and leave out topline.

So in a technical sentence like this, izmjenjivača may well mean of the heat exchanger or around the exchanger, depending on the English translation being used.

Yes. Croatian word order is more flexible than English because case endings show the grammatical roles.

The most neutral order here is:

• Ovlašteni projektant provjerava prostor oko izmjenjivača.

But other orders are possible, for example to change emphasis:

• Prostor oko izmjenjivača provjerava ovlašteni projektant.
  = It is the area around the exchanger that the authorized designer checks.

• Oko izmjenjivača ovlašteni projektant provjerava prostor.
  = More marked; emphasizes the location first.

Even though these are possible, the original sentence is the most straightforward and natural neutral version.

Because Croatian does not have articles like English a/an or the.

So:

• projektant can mean a designer or the designer
• prostor can mean a space/area or the space/area
• izmjenjivača can mean of an exchanger or of the exchanger

Which meaning is intended depends on context.

This is very normal in Croatian, and learners coming from English often notice it immediately.

It depends on context.

Ovlašteni literally suggests that someone is authorized or empowered to do something officially. In professional and legal contexts, especially with engineers, architects, or inspectors, English may translate it as:

• authorized
• licensed
• certified

The best English word depends on the system being described. In regulations, ovlašteni projektant often means a professionally recognized person who has the formal right to carry out or approve design work.

So authorized designer may be a literal translation, but licensed design engineer may sometimes sound more natural in English technical language.

A few useful pronunciation points:

• č is like ch in church, but usually a bit firmer
• j is like English y in yes
• š is like sh in ship
• lj is a single Croatian sound, somewhat like the lli in million for many English speakers

Rough pronunciation help:

• Ovlašteni ≈ ov-LAH-shte-nee
• projektant ≈ pro-yek-TANT
• provjerava ≈ pro-vye-RA-va
• prostor ≈ PRO-stor
• oko ≈ OH-ko
• izmjenjivača ≈ iz-mye-nyee-VA-cha

The exact sounds vary a bit by speaker, but that will get you close.

It can be either, depending on context.

Because the verb is in the present tense, Croatian allows both readings:

1. Current action

   • The authorized designer is checking the area around the exchanger.

2. General/procedural statement

   • The authorized designer checks the area around the exchanger.

In technical manuals, regulations, and professional descriptions, the general/procedural reading is very common.