T.Y. B. Arch. EXAMINATION, 2018
BUILDING SERVICES—II
(2008 PATTERN)
Time Three Hours Maximum Marks 100
N.B. Answers to the two sections should be written in separate
answer-books.
(ii Neat diagrams must be drawn wherever necessary.
(iii All qaestions are compulsory.
Figures to the right indicate full marks.
Section-I
1. Calculate the no. of exhaust fans required for a basement to be
used as an office, measuring 8 m × 10 m × 3.5 m. Show the positions
of the fans in plan and section.
Assume the appropriate air cycles required.
You may choose fans from the following
Diameter of fan Air handling capacity
of fan in cu.m/hr
305 mm 1900
380 mm 4000
457 mm 6800
610 mm 7900
P.T.O.
[5357]-33 2
Or
Explain with neat sketches the refrigeration cycle in the process
of air-conditioning.
2. Explain with neat sketches the working of a split type air-conditioner.

Or
Explain with neat sketches the various methods of natural ventilation.
3. Write short notes on any four of the following
Evaporator
Stack effect
Cooling Towers in air-conditioning
Cross ventilation
Conditions of human thermal comfort
Window AC Unit.
Section-II
4. What is Reverberation Time State Sabine's formula and the optimum
reverberation time for a lecture hall.
Calculate the reverberation time for a lecture hall with length
10 width 7 height 3.5 m.
Seating capacity of the hall 50.
[5357]-33 3
ITEM DESCRIPTION NOs. SIZE
Flooring Marble mosaic tiles
Walls 230 thick brick walls with
Neeru finished plaster
Ceiling Concrete slab with cement
finished plaster
Doors T. W. fully panelled doors 2 Nos. 1m× 2.1m
Windows Fully glazed windows 6 Nos. 1.8m× 1.2m
Assume full occupancy, all windows open and all doors closed.
Or
Explain with neat sketches the principles of auditorium acoustics.
5. Write short notes on any five of the following
Masking Effect of Sound
Fire Alarm System
Fire hydrants
Fire escape staircase
Types of sprinklers
Dry and wet risers
Fire extinguishers
Methods of cutting-off structure Borne Noise.