الفني بيختبر السرعة.

A common pronunciation is:

il-fannī biyikhtibir is-surʿa

A more learner-friendly breakdown:

• الفني → il-fannī
• بيختبر → biyikhtibir
• السرعة → is-surʿa

A few notes:

• الفني starts with il-, the Egyptian Arabic form of the.
• In السرعة, the l of il- is not heard clearly because س is a sun letter, so it sounds like is-surʿa.
• The ʿ in surʿa represents the letter ع, a consonant that does not exist in English.

In Egyptian Arabic, بيـ often marks the present tense for ordinary statements.

So:

• بيختبر = he tests / he is testing

In Egyptian Arabic, the same form can often cover both:

• The technician tests the speed
• The technician is testing the speed

depending on context.

This bi- prefix is extremely common in Egyptian Arabic present-tense verbs.

Because in Arabic, the verb itself already carries the meaning of the action in the present.

English says:

• The technician is testing the speed

Egyptian Arabic does not need a separate present-tense is here. Instead, it simply uses:

• الفني بيختبر السرعة

This is very normal. In Arabic, present-tense sentences usually do not use a separate verb meaning is/am/are the way English does.

Good question. Arabic can use both patterns.

Here you have:

• الفني بيختبر السرعة
• literally: The technician is testing the speed

This is a subject-first sentence, and it is very common in Egyptian Arabic, especially in everyday speech.

You could also hear a verb-first structure in some contexts, but in Egyptian Arabic, subject + verb + object is very natural and common.

So this word order is not strange at all.

فني means something like technician, technical worker, or sometimes specialist/technician-type worker, depending on context.

With the definite article ال, it becomes:

• الفني = the technician

In Egyptian pronunciation, this is usually il-fannī.

Also note that فني can sometimes be an adjective meaning technical or even artistic in other contexts, but here it is clearly being used as a noun: the technician.

Because both nouns are definite in this sentence.

• الفني = the technician
• السرعة = the speed

The prefix الـ is the Arabic definite article, equivalent to English the.

So the sentence is talking about:

• a specific technician
• a specific speed

not just a technician or speed in general.

Because س is a sun letter.

In Arabic, when الـ comes before a sun letter, the l sound assimilates to the next consonant.

So:

• السرعة
• written with ال
• pronounced is-surʿa, not il-surʿa

This is a very important pronunciation rule in Arabic.

Compare:

• الفني → il-fannī
  because ف is a moon letter, so the l is pronounced

but

• السرعة → is-surʿa
  because س is a sun letter, so the l assimilates

بيختبر is third person masculine singular.

That means it matches a subject like:

• he
• the technician

So:

• الفني بيختبر
• The technician is testing

If the subject were feminine, the verb would usually change:

• الفنية بتختبر = the female technician is testing

So the verb form helps show who is doing the action.

The basic verb is:

• اختبر = to test

In the present in Egyptian Arabic, with he:

• بيختبر = he tests / he is testing

So you can think of it like this:

• dictionary/basic form: اختبر
• present everyday form: بيختبر

This is a useful pattern to notice, because many Egyptian verbs work in similar ways.

Yes, in this word it is pronounced.

The ending ـة is called taa marbuuTa. In pause or citation form in Egyptian Arabic, it is often pronounced like -a.

So:

• سرعة → surʿa

Not surʿah in normal everyday pronunciation, and not silent.

With the article:

• السرعة → is-surʿa

So that final ـة gives the word its final -a sound.

Yes. In Egyptian Arabic, the present form with بيـ can often cover both meanings.

So this sentence could mean:

• The technician tests the speed
• The technician is testing the speed

Which one is intended depends on context.

If you are talking about what is happening right now, English prefers is testing.
If you are talking about a routine or general action, English prefers tests.
Arabic often uses the same form for both.

In Egyptian Arabic, a very common way to negate present verbs is with ما...ش.

So:

• الفني بيختبر السرعة
  = The technician is testing the speed

becomes:

• الفني ما بيختبرش السرعة
  = The technician is not testing the speed

This ma...sh negation pattern is one of the most important features of Egyptian Arabic.