Question

A vertical window provided on the sloping roof is called:

• A. Lantern window
• B. Skylight
• C. Gable window
• D. Dormer window

Hint:

Remember the differences:
• Dormer Window $\rightarrow$ Vertical window on sloping roof
• Skylight $\rightarrow$ Window fitted directly into roof slope
• Gable Window $\rightarrow$ Window in gable wall

Answer 1

The Correct Option is D

Concept: Different types of windows are used in buildings depending on their location, purpose, and roof configuration. A Dormer window is a vertical window constructed on a sloping roof. It projects outward from the roof surface and is commonly used to:
• Provide ventilation,
• Admit natural light,
• Increase usable attic space.

Step 1: Understand the definition of a dormer window.
A dormer window is:
• A vertical window,
• Built on a sloping roof,
• Covered by its own small roof structure. Hence, it matches the description given in the question.

Step 2: Analyze the given options.
• Lantern window -- Raised roof structure mainly used for ventilation and daylight in large halls or factories.
• Skylight -- Window installed directly on the roof surface, generally parallel to the roof slope.
• Gable window -- Window provided in the gable end wall of a building.
• Dormer window -- Vertical window provided on a sloping roof. \checkmark Therefore, the correct answer is: \[ {\text{Dormer window}} \]