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. In an induction motor, rotor speed is always
A. Less than the stator speed
B. More than the stator speed
C. Equal to the stator speed
D. None of these
2. What gives a diversion of 90 degree in the turn of a conduit?
A. Couplers
B. Elbow
C. Bends
D. Tees
3. The material to be used in the manufacture of a standard resistor should be of ?
A. Low resistivity
B. High resistivity and low temparature co-efficient
C. High temp co-efficient
D. Low resistivity and high temparature co-efficient
4. An electron device means the device in which the conduction of electrons takes place through ?
A. a gas
B. vaccum
C. a semi-conductor
D. a gas, semi-conductor or vaccum
5. Basic building blocks of digital multimeter are :
A. oscillator, amplifier
B. diode, op amp
C. rectifier, schmitt trigger
D. A/D, attenuator, counter
6. A capacitor consists of :
A. Conductors separated by dielectric
B. Insulators separated by dielectric
C. Ceramic places separated by mica disc
D. None of these
7. 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
8. Current is converted to voltage :
A. through a voltmeter
B. through a resistance
C. through an ammeter
D. through a galvanometer
9. The component deforming progressively under load at high temperatures is called as
A. Resilience
B. Creep
C. Fatigue
D. All of the above
10. Turbines installed at Bhakra Nangal are :
A. Pelton wheels
B. Francis turbines
C. Kaplan turbines
D. Propeller turbines
11. Due to the effect of armature reaction in DC machine, the value of generated voltage and flux per pole
A. Increases, decreases
B. Decreases, decreases
C. Decreases, increases
D. Increases, increases
12. To compress a liquid by 10% of its original volume, the pressure required is 2 ื 105 N/m2. the bulk modulus of the liquid is
A. 2 ื 104 N/m2
B. 2 ื 105 N/m2
C. 2 ื 107 N/m2
D. 2 ื 106 N/m2
13. Transmission lines connect ?
A. generating station to a switching station / step down transformer station
B. step down transformer station to service transformer banks
C. distribution transformer to consumer premises
D. service points to consumer premises
14. In wave winding the resultant pitch should be approximately equal to :
A. Double the back pitch
B. Double the front pitch
C. Sum of back pitch and front pitch
D. Difference between back pitch and front pitch
15. Four point in DC motor is used
A. To increase the field current
B. Not to affect the current through hold on coil even if any change in field current takes place
C. To increase the field current
D. None of these
16. When an SCR is turned on, the voltage across it is about .
A. Zero
B. 10 V
C. 1 V
D. 1 V
17. In 8 pole duplex lap winding, total number of parallel paths would be :
A. 1
B. 4
C. 8
D. 16
18. What is the difference between an atom and an ion?
A. Ions have always a larger mass than the atoms of the same element.
B. Ions are neutral particles while atoms always carry a positive charge.
C. Ions are always charged particles while the atoms are neutral as a whole.
D. Ions can only exist in liquid solutions.
19. In a DC machine, the form of armature reaction mmf is
A. Triangular
B. Sinusoidal
C. Saw tooth
D. Rectangular
20. 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
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