Black lung is a form of pneumoconioses that is caused by inhalation of coal mine dust. This dust aggravates the tissues of the lungs and accumulates to give normally pink lungs a black color. There is no specific treatment or cure for black lung, but it can be managed by oxygen therapy or medications that dilate the airways. 

If a patient were to aspirate (swallow a foreign object into the respiratory tract) it is most likely going to end up in the right principal bronchus. This is because the right principal bronchus is almost a vertical continuation of the trachea, while the left principal bronchus departs from the trachea at an angle. Terminal bronchioles are too small for foreign objects to be lodged.

Rhinitis is an inflammation of the nasal mucous membrane which is accompanied by the symptoms present in the question. It is caused by allergies. In contrast, rhinorrhea is the scientific term for "runny nose." It is also associated with the common cold, flu, and allergies, and it is caused by tears draining into the inferior nasal meatus through the nasolacrimal duct. Rhinoplasty is a kind of plastic surgery that changes the size or shape of the nose (a "nose job"). Rhinalgia, also known as rhinodynia, is simply the term for "pain in the nose."

In a healthy lung, the fluid in the pleural space makes the visceral and parietal pleura to adhere to one another. If air enters this space from a rupture of the lung or chest wall injury, it is called a pneumothorax, which can lead to collapse of the lungs. Laryngitis is the inflammation of the larynx, or the voice box. Bronchitis is the inflammation of the bronchi, which are branches of the trachea leading to the lungs. Emphysema is a progressive lung disease that causes shortness of breath. Pneumonia is an infection of the alveoli that can be life-threatening. 

"Sawtooth" P waves are characteristic of atrial flutter.

A prolonged P-R interval, that does not get progressively longer is typical of a type I A-V block.

A premature junctional/nodal beat would be represented on an ECG as an inverted or absent P wave. In a premature junctional/nodal beat, the atrioventricular (AV) node is firing before the sinoatrial (SA) node. Since the AV node is at the bottom of the right atrium, the net vector of atrial depolarization is occurring in a more upward direction, causing the P wave to be absent or inverted. Note that there would be a compensatory pause after the premature beat.The answer could not be a premature atrial contraction because the P wave is absent or inverted (P wave would be normal in a premature atrial contraction (PAC)).

Ventricular fibrillation is a very serious issue that requires immediate defibrillation. Ventricular fibrillation is the result of ventricular beats originating from many different automaticity foci, so the QRS looks squiggly, very fast, and incoherent. There are no P waves since the beats are originating in the ventricles. 

A bundle branch block is a block in one of the bundle branches, causing a long QRS (>.10 seconds). It is different than a PVC in that a bundle branch block will show a P wave since the beats are still originating in the atria. Bundle Branch Blocks also tend to show a notched QRS.

In First Degree AV Block, there is a longer than normal PR interval (>.20s) due to slowed AV node conduction. Second degree, Mobitz Type 1 (Wenckebach) is progressive lengthening of the PR interval followed by a dropped QRS. Second Degree, Mobitz Type 2 is sudden dropping of the QRS (no lengthening of PR interval). Third Degree AV Block is when there is no relationship between the P and the QRS.