A fresh set of 20 random questions is generated every time you open this page and every time you refresh it.For each of the following multiple choice questions, choose the most appropriate answer :
1. A Colpitt's oscillator employs :
A. Inductive feedback
B. Capacitive feedback
C. Negative feedback
D. Stray capacitance feedback
2. Mass of material deposited over an electrode is :
A. Proportional to voltage
B. Proportional to time only
C. Proportional to currentonly
D. Proportional to quantity of electricity and ECE
3. Frequency generated by an oscillator can be measured with :
A. Voltmeter
B. Frequency meter
C. Either CRO or Electronic frequency counter
D. AVO meter
4. When fluorescent lamps are used to replace incandescent bulbs, usually :
A. Greater illumination occurs
B. Less illumination occurs
C. Only one colour can be obtained
D. More shadow occurs but with less eye strain
5. A current is said to be direct current when its ?
A. Magnitude remains constant with time
B. Magnitude changes with time
C. Direction changes with time
D. Magnitude and direction changes with time
6. The disadvantages of renewable source of energy is/are ?
A. Intermittency
B. Lack of dependability
C. Availability in low energy densities
D. All the above
7. A 3 digit display DVM with a maximum reading of 1999 indicates
A. increase by a factor
B. reduction by a factor
C. no change in value
D. depends on the circuit components
8. Type of slot used in small DC Armature is :
A. Open type with tapered slot
B. Open type with Dove tail
C. Semi-enclosed type
D. Closed type
9. Type of motor that does not have a commutator is :
A. Repulsion motor
B. Induction motor
C. DC shunt motor
D. AC series motor
10. The conversion of AC into DC can be affected by the use of ?
A. Motor-generator set
B. Mercury arc rectifier
C. Silicon diodes
D. Any of the above
11. The material that contains free electron is :
A. PVC
B. Silver
C. Rubber
D. Mica
12. How is 11.87 V displayed on a 10 V range for a 4 digit display?
A. 11.870
B. 1.1870
C. 118.7
D. 0.1187
13. CAT 5 is used for :
A. LAN
B. Internet
C. Current
D. Voltage
14. Which half of the cleat pair is used to hold cable grip?
A. Top
B. Middle
C. Bottom
D. All of these
15. An electron having mass m kg and charge e columb travels from rest through a potential difference of V volts. It has a kinetic energy of ?
A. mV joules
B. m eV joules
C. eV joules
D. m/e joules
16. The highest transmission voltage in india is ?
A. 750 KV
B. 400 KV
C. 220 KV
D. 132 KV
17. Purpose of providing Armouring to an underground cable is to prevent :
A. White ant attack
B. Entry of moisture
C. Mechanical injury
D. Bursting
18. Underground system cannot be operated above :
A. 220kV
B. 66kV
C. 33kV
D. 11 kV
19. A rubber cord of cross sectional area 1 mm2 and unstretched length 10 cm is stretched to 12 cm and then released to project a stone of mass 5 gram.If Y for rubber = 5 Χ 108N/m2, then the tension in the rubber cord is
A. 25 N
B. 50 N
C. 100 N
D. 200 N
20. The basic elements of an electric drive are :
A. electric motor and the transmission system
B. electric motor ,the transmission and control system
C. the transmission and control system
D. electric motor and conversion equipment
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