LAGOS CITY POLYTECHNIC, IKEJA
SCHOOL OF ENGINEERING AND APPLIED SCIENCE
DEPARTMENT OF COMPUTER ENGINEERING
2015/2016 SEMESTER EXAMINATION
COURSE TITLE:
COURSE CODE:
FOR WHOM:
ANSWER
COMPUTER POWER SYSTEM NO OF QUESTIONS : 6
CTE 224
TIME ALLOWED: 2 HRS
ND YR III
CE
(PT)
INSTRUCTIONS:
ANY
FOUR
QUESTIONS
1.
(a)
With the aid of a line diagram only describe the Nigeria National grid supply.
(b)
system.
Mention 3 sources of electrical energy supply as a means of powering computer
(c)
State
(a)
Explain the process of having a good cooling system in a power supply unit.
(b)
Give 4 importance of having a good ventilation system in a power supply unit
(c)
Mention
(a)
Give
(b)
State the kind of cable used in router management and how is it connected?
(c)
With the aid of a block diagram describe how voltage is regulated in a power
unit.
4.
(a)
30Ah
How long in hours will it take a fully charged 650VA UPS with battery rated 12V,
Powering
a
300
Watts
Desktop
Monitor.
(b)
With the aid of a labelled diagram describe an Antistatic Wrist Wrap.
(c)
Define
(a)
Explain the principle of operation of automatic voltage regulator (AVR).
2.
3.
supply
5.
the
function
any
2
2
differences
of
a
methods
between
Static
solar
of
UTP
charge
controller.
testing
data
lines.
and
STP
cable.
electricity.
(b)
Explain the principle of operation and components of Automatic voltage
switcher(AVS).
6.
(a)
Explain briefly the diffferent sources of electrical energy applicable in powering
computer
systems.
(b)
softwares.
(c)
What is the relevance of steady power supply as a means of protecting computer
Lis the components of a UPS