LAGOS CITY POLYTECHNIC, IKEJA
SCHOOL OF ENGINEERING AND APPLIED SCIENCE
DEPARTMENT OF ELECT/ELECT AND COMPUTER ENGINEERING
2013/2014 FIRST SEMESTER EXAMINATION
COURSE
TITLE:
& REPAIRS
COURSE CODE: EEC 237
FOR WHOM:
ND YR III
NO OF STUDENT:
ANY
ELECT/ELECT
MAINTENANCE
NO OF QUESTIONS :
6
1
TIME ALLOWED: 2 /2 HRS
EE, CE
PT
EXAMINER:
INSTRUCTIONS: ANSWER
FOUR
QUESTIONS
1.
(a)
Mention and state functions of 8 tools used for the electrical/electronic
maintenance
repair.
(b)
Mention and state functions of 3 electronic measuring instrument.
(c)
Explain the procedures involved in electrical electronic troubleshooting
2.
(a)
(b)
(c)
Mention and state functions of 3 electronic measuring instruments.
Mention and explain types of electrical/electronic maintenance methods.
Explain
electrical/electronic
maintenance
and
repair
practices.
3.
(a)
State
the
function
of
the
following
(i)
Transistor
(ii)
Transformer
(iii) Fuse
(iv) Capacitor
Differentiate
between
short
circuit
and
open
(b)
4.
devices
circuit
faults.
(a)
(b)
examples
(c)
printed
Distinguish between electrical/electronic maintenance and repairs
Differentiate between Active and passive electronic devices with two practical
each.
Mention and explain tools required for soldering and desolvering exercise onthe
5.
(a)
Explain
the
procedures
involved
in
the
following:
(i)
Soldering and desoldering of electrical and electronic component
(ii)
Electrical
troubleshooting.
6.
(a)
circuit
board
(PCB)
Explain
the
use
of
multimeter
in
testing
the
following:
(i)
AC
Voltage
(ii)
AC
Current
(iii) DC
Voltage
(iv) DC
Current
(v)
Resistance
(b)
State
the
function
of
the
following
devices:
(i)
Diode
(ii)
Transistor
(iii) Transformer
(iv) Capacitor
(v)
Fuse
(vi) Relay
(v)
Switch
(c)
Explain how to determine the resistance value of color coded resistor.