בפיקוח ההנדסי בודקים את האינסטלציה.

Literally, בפיקוח ההנדסי means in the engineering supervision/inspection.

• ב־ = in / during / as part of
• פיקוח = supervision, inspection, oversight
• ההנדסי = the engineering / the technical-engineering

So the whole phrase means something like:

• during the engineering inspection
• as part of the engineering supervision
• in the engineering review

The exact English wording depends on context.

The prefix ב־ is a very common Hebrew preposition meaning in, at, during, or as part of, depending on context.

Here it does not just mean physical location. It is more like:

• during the engineering inspection
• within the framework of the engineering supervision

So בפיקוח ההנדסי is functioning adverbially, giving the setting or context in which the action happens.

Because the noun פיקוח is definite here.

In Hebrew, when a noun phrase is definite, the adjective describing it is also definite.

So:

• פיקוח הנדסי = engineering supervision / an engineering inspection
• הפיקוח ההנדסי = the engineering supervision / the engineering inspection

But after the preposition ב־, the ה on הפיקוח often disappears in pronunciation and spelling changes through contraction:

• ב + הפיקוח → usually בפיקוח

The adjective still keeps its definite article:

• בפיקוח ההנדסי

So even though you do not see ה on פיקוח, the whole phrase is still definite because of the preposition + article combination.

This is a very common Hebrew pattern.

בודקים literally means they check or are checking, but Hebrew often uses 3rd person plural with no stated subject to mean something general or impersonal, like:

• they check
• people check
• one checks
• sometimes even it is checked

So in this sentence, בודקים את האינסטלציה does not necessarily mean a specific they. It can mean:

• they check the plumbing
• the plumbing is checked
• people inspect the plumbing

This is a very natural way in Hebrew to express an unspecified agent.

Yes. Even though the Hebrew uses an active plural verb, English will often prefer a passive translation.

Hebrew:

• בפיקוח ההנדסי בודקים את האינסטלציה.

Natural English possibilities:

• During the engineering inspection, the plumbing is checked.
• The plumbing is inspected as part of the engineering review.
• In the engineering inspection, they check the plumbing.

So grammatically the Hebrew is active, but functionally it can feel close to a passive statement.

Because האינסטלציה is a definite direct object.

In Hebrew, את marks a direct object when it is definite, such as:

• a noun with ה־
• a proper name
• a noun with a possessive suffix
• something made definite in another way

Here:

• האינסטלציה = the plumbing

So Hebrew says:

• בודקים את האינסטלציה = they check the plumbing

Compare:

• בודקים אינסטלציה = they check plumbing / they check some plumbing
• בודקים את האינסטלציה = they check the plumbing

אינסטלציה is a loanword and usually means plumbing or the plumbing system.

Depending on context, it can refer to:

• pipes
• water systems
• sanitary installation
• plumbing infrastructure

So in this sentence, it most likely means the plumbing system in a building or project.

Yes. The word order is natural.

Hebrew sentence:

• בפיקוח ההנדסי בודקים את האינסטלציה.

Structure:

• בפיקוח ההנדסי = context/frame
• בודקים = verb
• את האינסטלציה = direct object

This is a common pattern in Hebrew: a prepositional phrase can come first to set the scene, and then the main clause follows.

You could also imagine other word orders in different contexts, but this one sounds normal and idiomatic.

פיקוח is a noun meaning supervision, oversight, or inspection.

For many learners, it is useful simply to memorize it as a complete vocabulary item. But if you are curious, it belongs to a word family connected with supervision and monitoring.

Common related uses include:

• פיקוח = supervision / oversight
• לפקח = to supervise / oversee
• מפקח = inspector / supervisor

So פיקוח הנדסי is basically engineering oversight/supervision.

Because הנדסי is an adjective meaning engineering or technical-engineering, formed from הנדסה (engineering).

This ־י ending is very common in Hebrew adjectives that mean related to something.

Examples:

• היסטוריה → היסטורי = historical
• כלכלה → כלכלי = economic
• הנדסה → הנדסי = engineering / technical

Here it is masculine singular because it describes פיקוח, which is masculine singular.

The adjective would have to agree with the noun in gender and number.

Here:

• פיקוח is masculine singular
• so the adjective is הנדסי

If the noun were feminine singular, the adjective would usually be הנדסית.

For example:

• בדיקה הנדסית = an engineering inspection/test
• הבדיקה ההנדסית = the engineering inspection/test

Agreement is very important in Hebrew adjectives.

A reasonable pronunciation guide is:

bepikuach ha-handasí bodkím et ha-instalátsya

A few notes:

• בפיקוח = be-pi-ku-ach
• ההנדסי = ha-handasi, with the stress usually on the last syllable: -sí
• בודקים = bodkim
• האינסטלציה = ha-instalatsya

Pronunciation can vary somewhat depending on speaker and accent, but this will be understood well.

Yes, but it means something slightly different.

• בפיקוח ההנדסי בודקים את האינסטלציה = In the engineering inspection, they check the plumbing / the plumbing is checked during the engineering inspection
• הפיקוח ההנדסי בודק את האינסטלציה = The engineering supervision/inspection checks the plumbing

The second version makes הפיקוח ההנדסי the grammatical subject. That is possible, but it sounds more like the engineering department/inspection body is doing the action.

The original sentence focuses more on the process or context, not on naming a specific subject.