# Mr Electro

Hi Mr Electro family!! This is an educational website for electrical stream ( Electrical engineering, Diploma student and PreDiploma students) . This is mainly focused for those students who are waiting for Government jobs like LokSewa Aayog PSC, NEA, CANN NTC for level 3, level 4, level 5 and level 7 and also private jobs.

## Friday, August 12, 2022

This website is a source material provider for NEA, NTC, PSC, CANN preparation students for level 3, level 4, level 5, level 6, level 7 for Electrician, Foreman, Supervisor, Assistant Enginner, & Enginner. You can find NEA question paper level 4 || Electrical Level 4 2074 in below.

## Electrical Level 4 Foreman 2074 taken by LokSewa for NEA.

Multiple Choice
50x2=100 Marks

1. The most economical distribution system is
a) DC system
b) 3-phase, 3 wire ac
c) Single phase ac system
d) 3-phase, 4 wire ac
2. When there is dead end of line, which type of insulators are used?
a) Suspension insulators
b) Post type insulators
c) Pin type insulators
d) Strain insulators
3. A circuit is disconnected by isolators when
a) Line is energized
b) there is no current on line
c) line is on full load
d) circuit breaker is not open
4. Which of the following statement is true?
a) At higher voltage, the cost of transmission reduced
b) At higher voltage, the cost of transmission increased
c) At higher voltage, Efficiency decreased
d) All of the above
5. D.C. system in power stations and substations is supplied by
a) d.c. generators
b) d.c. battery
c) invertors
d) all of the above
6. The medium voltage sub transmission, in Kathmandu valley is
a) 11 kv
b) 33 kv
c) 66 kv
d) 220 kv
7. The main reason for using the high voltage for the long distance power transmission is
a) reduction in transmission losses
b) reduction in time of transmission
c) increase in system reliability
d) none of the above
8. Characteristics of arc quenching medium is
a) High dielectric strength
b) Non flammable
c) Less thermal conductivity
d) Both a and b
9. The earthing of the electrical equipment is necessary for the protection against
b) voltage fluctuation
c) danger of electric shock
d) high conductor temperature
10. Location of lightning arrester is near a
a) Generator
b) Transformer
c) Bus-bar
d) Circuit breaker
11. A Buchholz relay is used in the protection of
a) Generator
b) Bus-bar
c) Transformer
d) Transmission line
12. The rating of a fuse is expressed in terms of
a) Amperes
b) Volts
c) VAR
d) KVA
13. The advantage of neutral earthing is
a) Safety of personnel
b) reduction of earth fault current
c) elimination of arching ground
d) none of the above
14. Cross-flow turbine is also known as
a) Reaction Turbine
b) Impulse Turbine
c) Kaplan Turbine
d) All of the above
15. On occurrence of the fault on connected circuit, the circuit breaker operates
a) manually
b) automatically
c) manually through a control switch
d) depending upon the circuit breaker design
16. A capacitance of 0.05 ÂµF equals
0.05 x 106 F
0.05 x 10_6 F
0.05 x 10_1² F
0.05 x 101² F
17. A rheostat is a form of
variable resistor
variable capacitor
potentiometer
thermocouple
18. The ratio of flux density to electric field intensity in the dielectric is called
permittivity
field intensity
permeability
elasticity
19. Internal resistance of the ideal voltage source is
infinite
zero
to be determined
20. What is the conductance of a circuit having three 10 Î© resistor in parallel?
0.3 S
3.33 S
0.33 S
30 S