Electrical Engineering Quiz 22

1 / 50

**Generators for peak load plants are usually designed for maximum efficiency at____________? **

2 / 50

**If the energy is supplied from a source, whose resistance is 1 ohm, to a load of 100 ohms the source will be___________? **

3 / 50

**The resistance LM will be____________? **

4 / 50

**A transistor converts __________________? **

5 / 50

**Slip-rings in a synchronous motor carry____________? **

6 / 50

**The potential gradient across the material of low permittivity is than across the material of high permittivity? **

7 / 50

**When /?2 is the rotor resistance, .X2 the rotor reactance at supply frequency and s the slip, then the condition for maximum torque under running conditions will be_____________? **

8 / 50

**Which is of the following data is required to draw the circle diagram for an induction motor ? **

9 / 50

**Hybrid means_____________? **

10 / 50

**A heat sink is generally used with a transistor to______________? **

11 / 50

**The Q of an LC circuit is given by _________________? **

12 / 50

**technique gives quick transient and stability response______________? **

13 / 50

**1 db corresponds to_____________change in power level? **

14 / 50

**Selenium is __________ semiconductor? **

15 / 50

**A coil induces 350 mV when the current changes at the rate of 1 A/s. The value of inductance is___________? **

16 / 50

**In a multivibrator, we have___________ feedback? **

17 / 50

**Insertion of resistance in the stator of an induction motor___________? **

18 / 50

**A permeable substance is one_____________? **

19 / 50

**The parallel combination of a 470 ? resistor and a 1.5 k? resistor is in series with the parallel combination of five 1 k? resistors. The source voltage is 50 V. The percentage of the load current through any single 1 K? resistor is__________? **

20 / 50

**Which of the following circuit component opposes the change in the circuit voltage ? **

21 / 50

**In aluminium conductors, steel core is provided to____________? **

22 / 50

**The function of pole shoes in the case of D.C. machine is______________? **

23 / 50

**A parallel resonant band-pass filter consists of a 6.8 ? resistor in series with a parallel network made up of an 8 ?H coil and a 120 pF capacitor. The output is taken across the capacitor/coil. Assume RW = 0 ?. What is the center frequency of the filter? **

24 / 50

**A 6 V battery output is divided down to obtain two output voltages. Three 2.2 k? resistors are used to provide the two taps. The two output voltages are___________? **

25 / 50

**Battery operated trucks are used in________________? **

26 / 50

**In a three phase converter, the number of notches per cycle is____________? **

27 / 50

**With three resistances connected in parallel, if each dissipates 20 W the total power supplied by the voltage source equals_____________? **

28 / 50

**The electric field intensity at a point situated 4 meters from a point charge is 200 N/C If the distance is reduced to 2 meters, the field intensity will be______________? **

29 / 50

**Three point starter can be used for______________? **

30 / 50

**The common impurity in the electrolyte of lead-acid battery is_____________? **

31 / 50

**For measuring a very high resistance we should use_______________? **

32 / 50

**Electric field intensity is a quantity_____________? **

33 / 50

**Which of the following materials is used in the manufacture of resistance grids to be used in the starters of large motors ? **

34 / 50

**Is a cable is to be designed for use on 1000 kV, which insulation would you prefer ____________? **

35 / 50

**Acharge which when placed in vacuum from an equal and similar charge repels with a force of 9 x 10 N, is known as_____________? **

36 / 50

**If the load current drawn by unregulated power supply increases, the d.c. output voltage______________? **

37 / 50

**The concept on which Superposition theorem is based on_____________? **

38 / 50

**Reduced voltage starter can be used with_____________? **

39 / 50

**The dissipation factor of a good dielectric is of the order of____________? **

40 / 50

**The unit of dielectric strength is given by___________? **

41 / 50

**Power factor of the following circuit will be unity **

42 / 50

**Which of the following is the essential requirement of peak load plant ? **

43 / 50

**Which of the following motors is usually used in house-hold refrigerators ? **

44 / 50

**The circuit has resistors, capacitors and semi-conductor diodes. The circuit will be known as___________? **

45 / 50

**For the same peak value, which of the following wave has the least mean value ? **

46 / 50

**In an intrinsic semiconductor, the number of free electrons_____________? **

47 / 50

**Which of the following affect greatly the resistivity of electrical conductors ? **

48 / 50

**___________From which of the following transfer function can be obtained ? **

49 / 50

**Economisers improve boiler efficiency by__________? **

50 / 50

**In the case of lap winding resultant pitch is____________? **

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