That would depend on the average ambient temperature of the area the boilers are servicing
The word twin is not necessarily plural, for example, I have a twin bed. I have a twin brother. Singular in both cases.
The proper noun Twincicle refers either to a Christmas light set or a twin Popsicle. The proper noun Twin Cycle is a motorcycle company.
There are narrow twin is 36" by 75" and the regular twin is 39" by 75". But then there is the college matress which is 36" by 80". It is very important to know the size of your twin mattress, actually any matress so you know the proper sheet size to get for your bed.
Oh, dude, "twin" is not a proper noun. It's just a regular ol' common noun. Proper nouns are like Beyoncé or McDonald's, you know, the fancy ones with capital letters at the start. Twin is more like, "Hey, look, it's another set of twins!" Just your average, run-of-the-mill noun.
No. They are two completely different units.
16,000 - 20,000, depending on specifics. More for heavy haul units.
Not all twin bull calves will be infertile. However, some may have reduced fertility due to developmental issues or abnormalities associated with being a twin. It's important to consult with a veterinarian for a proper assessment and guidance.
Proper name from Greek Thomas / Θωμάς [thomas], of Aramaic origin and said to mean "a twin"(John's gospel refers to Thomas as "ho legomenos didymos", "called the twin;" cf. Syriac toma"twin," Arabic tau'am "twin")
What is the proper adjustment for a 2004 Heritage Softtail Clutch. It seems I am releasing the handle 2/3 of the way out before clutch engadges. What is the proper procedure for adjusting the clutch
twin cities
No, she is not a twin. But she has a younger sister who is a twin.
It depends on what context it's being used in. For example: The World Trade Center was centered around two twin towers... Here you wouldn't need to capitalize them because they're not being used as proper nouns. They're just a type of building that you're describing. However, if you were to say: The day the Twin Towers were destroyed will be forever remembered. You need the capitals because you are referring to two specific buildings and the phrase is being used as a name, thus making it a proper noun.