A helyszíni felmérés és a bekötés ma lesz.

Helyszíni means on-site or at the location.

It comes from:

• helyszín = site, location, venue
• -i = a very common Hungarian suffix that turns a noun into an adjective

So:

• helyszín → helyszíni
• site → on-site / site-related

In this sentence, helyszíni felmérés means an on-site survey/assessment.

Felmérés is a noun meaning survey, assessment, inspection, evaluation, depending on context.

It comes from the verb:

• felmér = to assess, survey, measure up

Hungarian often uses action nouns like this where English might also use a noun:

• felmérés = survey
• bekötés = installation / hookup / connection

So the sentence is built around two scheduled events or procedures, not around finite verbs like they will survey or they will connect.

Here bekötés most likely means connection, hookup, or installation.

It comes from:

• beköt = to connect, to hook up, to install something into a system

In everyday Hungarian, this is very common in utility or telecom contexts, such as:

• internet installation
• cable hookup
• utility connection

So in this sentence, a bekötés is probably the actual service connection/installation appointment.

Lesz is the future form of van.

• van = is
• lesz = will be

So ma lesz means will be today or will take place today.

Even though ma means today, Hungarian still uses lesz if the event is still in the future from the speaker's point of view, for example later the same day.

Yes, sometimes ma van is also possible, but the nuance is a little different.

• ma van = it is today / it takes place today
• ma lesz = it will be today, often sounding a bit more forward-looking

So if someone is announcing or confirming a planned event that has not happened yet, ma lesz is very natural.

For example:

• A koncert ma van. = The concert is today.
• A koncert ma lesz. = The concert will be today.

Both can work, but lesz can sound a bit more like a scheduling statement.

That is a very natural question.

In many cases, two subjects joined by és would suggest a plural verb. However, Hungarian often allows singular agreement when the speaker treats the two things as one combined event or one package.

That is probably what is happening here:

• the on-site survey and the installation are being presented as one appointment block

So lesz can sound natural.

You may also hear lesznek in some contexts, especially if the speaker wants to treat them as two separate things. But in service or scheduling language, singular lesz is quite common when the whole thing is viewed as one arranged occurrence.

Because both nouns are definite:

• a helyszíni felmérés = the on-site survey
• a bekötés = the installation / the hookup

Hungarian often repeats the definite article in coordinated noun phrases, especially when the two items are felt as separate named things.

So:

• A helyszíni felmérés és a bekötés...

is perfectly normal and natural.

If the second article were omitted, the phrase could sound more compressed or technical, but the repeated article is standard and clear.

Yes, the word order can change.

Hungarian word order is flexible, but it is not random. It depends a lot on topic, focus, and what the speaker wants to emphasize.

In this sentence:

• A helyszíni felmérés és a bekötés = topic
• ma = time expression
• lesz = verb

So this version is a neutral way to say it.

You could also say:

• Ma lesz a helyszíni felmérés és a bekötés.

This puts more attention on today.

So both are possible, but they do not sound exactly the same in emphasis.

Roughly:

• helyszíni ≈ hey-see-nee
• bekötés ≈ beh-kö-taysh

A few important spelling points:

• sz is pronounced like English s
• s is pronounced like English sh
• ly is pronounced like y
• ö has no exact English equivalent; it is similar to German ö or French eu

More exactly in IPA:

• helyszíni = /hɛjsiːni/
• bekötés = /bɛkøteːʃ/

So one common learner mistake is to read sz as English z or s as English s. In Hungarian, those values are different.