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. Which of the following power plants is the least reliable ?
A. Wind
B. Tidal
C. Geothermal
D. Solar
2. Resistance of an open circuit is equal to:
A. Zero
B. Very low
C. Very high
D. Infinite
3. A two phase servomotor is commonly used in feedback control system to drive the loads and as sensors to measure
A. Speed of controlled element
B. Position of controlled element
C. A and B
D. None of these
4. Which wiring is recommended only for temporary installations?
A. Cleat
B. CTS/RTS
C. Metal
D. PVC conduit or PVC capping
5. In which of the following appliances is the heating effect used?
A. Electric motor
B. Transformer
C. Electric furnace
D. Generator
6. Decimal 43 in hexadecimal and BCD number system is respectively……. and ……..
A. B2 and 01000011
B. 2B and 01000011
C. 2B and 00110100
D. B2 and 01000100
7. Which of the following is a characteristic of Polytetra-flouro-ethylene?
A. High coefficient of friction
B. Tough at high temperature
C. Resistance to chemical attack
D. All of the above
8. If two conductors carrying currents in opposite direction are placed parallel to each other then the magnetic fields set up by the conductors
A. Attract each other
B. Repel each other
C. Perpendicular to each other
D. Parallel to each other
9. Non-metallic conduits are made of :
A. Fibres
B. Asbestos
C. PVC
D. All of above
10. When visual indication of pressure level is required then the instrument generally used is
A. Monometers
B. Diaphragm sensors
C. Bourdon tube
D. Resonant wire device
11. With increase in temperature of the body, the emission of light waves is
A. Increases
B. Decreases
C. Remains same
D. None of these
12. Which type of wiring uses insulated cables supported in porcelain cleats?
A. Cleat
B. CTS/RTS
C. Metal
D. PVC conduit or PVC capping
13. Overhead system can be designed for operation upto :
A. 400 kV
B. 220 kV
C. 132 kV
D. 66 kV
14. 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
15. The curve between V and I of SCR when anode is positive w.r.t cathode and when anode is negative w.r.t cathode are known as
A. both as forward characteristics
B. both as reverse characteristics
C. former as forward characteristics and later as reverse characteristics
D. former as reverse characteristics and later as forward characteristics
16. Selection of electric motor is governed by :
A. Nature of load to be handled
B. Environmental conditions
C. Nature of electric supply available
D. All these
17. Rigid PVC conduits are not suitable for use with the normal working temperature of the conduits and fittings exceeding :
A. 40°C
B. 55°C
C. 70°C
D. 85°C
18. Polarisation in a primary cell can be removed by :
A. Coating electrodes of cell
B. Chemical action
C. Discharging the cell
D. Disposing the cell
19. Gate that assumes 1 state if and only if the input does not take a 1 state is called :
A. AND gate
B. NOT gate
C. NOR gate
D. B and C
20. The operation of an electric motor or generator is based on
A. The law of electromagnetic induction
B. Interaction between magnetic field and current carrying conductor
C. Interaction between two electric fields
D. Interaction between magnetic field and electric field
Dr K Chaudhry 5 Alpha Inmternational City, Fatehabad 125050 M: 9810570740, 9810571993facebook.com/doctorkc