Quiz: Electrical Engineering
Exam: UPSSSC JE
Topic: Utilization of electrical energy
Each question carries 1 mark.
Negative marking: 1/4 mark
Time: 10 Minute
Q1. The ratio of horizontal distance between lamps and the mounting Height of lamp is referred to as
(a) space to height ratio
(b) space to intensity ratio
(c) Height to intensity ratio
(d) Luminosity ratio
Q2. Power factor of fluorescent lamp is about
(a) zero
(b) 0.5 lead
(c) 0.5 lag
(d) unity
Q3. Which of the following lamp gives nearly monochromatic light?
(a) Sodium Vapour Lamp
(b) GLS lamp
(c) Tube Light
(d) Mercury Vapour lamp
Q4. The function of inert gas in filament lamp is
(a) increase the illumination
(b) decrease the power consumption
(c) minimize the effect of vaporization during service
(d) decrease the Clare
Q5. To prevent the excessive brightness, which type of lighting scheme is used?
(a) direct
(b) indirect
(c) general
(d) local
Q6. What is the function of choke in a fluorescent lamp?
(a) starting purpose
(b) produce high voltage at starting
(c) improve power factor
(d) minimize the power consumption
Q7. Carbon arc lamp are commonly used in
(a) Domestic lighting
(b) Street lightning
(c) Cinema projectors
(d) Photography
Q8. Arc can be produced by?
(a) AC current only
(b) DC current only
(c) Both AC & DC current
(d) All options are incorrect
Q9. The illumination at a point 5 meter below a lamp is 6 lux. The candle power of the lamp is
(a) 160
(b) 180
(c) 150
(d) 260
Q10. Luminous intensity is expressed as
(a) radians
(b) candela
(c) lumens
(d) none of the above
Solutions
S1. Ans. (a)
Sol. space to height ratio
S2. Ans. (c)
Sol. 0.5 Lag
S3. Ans. (a)
Sol. Sodium Vapour Lamp
S4. Ans. (c)
Sol. minimize the effect of vaporization during service
S5. Ans. (b)
Sol. Indirect lighting scheme
S6. Ans. (b)
Sol. produce high voltage at starting
S7. Ans. (c)
Sol. Cinema projectors
S8. Ans. (c)
Sol. Both AC & DC current
S9. Ans. (c)
Sol. Candela power =? Hight = 5-meter, Illumination = 6 lux
Illumination = CP/h^2 ,
CP = 6×5^2 = 150 W
S10. Ans. (b)
Sol. Luminous Intensity (I)=(Luminous Flux)/(Solid angle)=Candela
