Question

Match List - I with List - II 

List - I (Components)	List - II (Applicable Area)
A. Dumb waiter	IV. Small lift generally used for carrying food
B. FCU	III. A part of central air-conditioning plant that handles/exchanges air
C. Reflux Valve	II. Used in water supply pipes to prevent backflow of water
D. Busway	I. Cable and conduit assembly

• A. A-III, B-IV, C-I, D-II
• B. A-IV, B-III, C-II, D-I
• C. A-IV, B-I, C-II, D-III
• D. A-II, B-III, C-IV, D-I

Hint:

Important building service components:
• FCU $\rightarrow$ HVAC air handling unit
• Reflux Valve $\rightarrow$ Prevents backflow
• Busway $\rightarrow$ Electrical distribution system
• Dumb Waiter $\rightarrow$ Small service lift

Answer 1

The Correct Option is B

Concept: Building services involve various mechanical, electrical, plumbing, and HVAC components used for efficient functioning of modern buildings. Understanding the applications of these components is important in building services engineering.

Step 1: Match each component with its applicable area.
• A. Dumb waiter
A dumb waiter is a small service lift generally used for carrying food, files, or small goods between floors.
Therefore: \[ A \rightarrow IV \]
• B. FCU
FCU (Fan Coil Unit) is a part of a central air-conditioning system that handles and exchanges air.
Therefore: \[ B \rightarrow III \]
• C. Reflux Valve
A reflux valve prevents backflow in water supply pipelines.
Therefore: \[ C \rightarrow II \]
• D. Busway
A busway is a cable and conduit assembly used for electrical power distribution.
Therefore: \[ D \rightarrow I \]

Step 2: Identify the correct combination.
Thus, the correct matching is: \[ A-IV,\; B-III,\; C-II,\; D-I \] Therefore, the correct answer is: \[ {A\text{-}IV,\; B\text{-}III,\; C\text{-}II,\; D\text{-}I} \]