Electrical Engineering Quiz 61

1 / 50

**If the centrifugal switch does not open at 70 to 80 percent of synchronous speed of motor, it would result in_________? **

2 / 50

**In a D.C. shunt motor, under the conditions of maximum power, the current in the armature will be_____________? **

3 / 50

**For germanium the forbidden energy gap is_______________? **

4 / 50

**Which of the following is an advantage of heating by electricity ? **

5 / 50

**_____________is not a final control element? **

6 / 50

**A balanced Wheatstone bridge consists of an RV of 3,500 ?, an R2 of 200 ?, and an R3 of 680 ?. The value of RUNK is____________? **

7 / 50

**Which of these is the best description for a Zener diode ? **

8 / 50

**An ideal traction system should have_______________? **

9 / 50

**With 21 V applied, if R1 = 5 ohms, R2 = 35 ohms, and R3 = 14 ohms, what is the current of R2 if R1 is series connected with parallel circuit R2 and R3? **

10 / 50

**D.C. generator generally preferred for charging automobile batteries is______________? **

11 / 50

**Switching of a lamp in house produces noise in the radio. This is because switching operation produces________? **

12 / 50

**To avoid formation of grooves in the commutator of a D.C. machine? **

13 / 50

**In thermal-electrical analogy charge is considered analogous to_______________? **

14 / 50

**If the centrifugal switch of a two-value capacitor motor using two capacitors fails to open then____________? **

15 / 50

**The secondary winding of which of the following transformers is always kept closed? **

16 / 50

**Reciprocal of reluctance is_______________? **

17 / 50

**Four wires of same material, the same cross-sectional area and the same length when connected in parallel give a resistance of 25 Q. If the same four wires are connected is series the effective resistance will be________? **

18 / 50

**Change of D.C. excitation of a synchronous motor changes: **

19 / 50

**In Ward-Leonard control the lower limit of speed is imposed by________? **

20 / 50

**All good conductors have high____________? **

21 / 50

**A substance whose molecules consist of dissimilar atoms is called____________? **

22 / 50

**The power factor of an induction motor under no-load conditions will be closer to_____________? **

23 / 50

**The value of stability factor for a base resistor bias is________________? **

24 / 50

**An RC high-pass filter consists of an 820 ? resistor. What is the value of C so that Xc is ten times less than Rat an input frequency of 12 kHz? **

25 / 50

**Which D.C. motor has got maximum self relieving property ? **

26 / 50

**In order that a hydrometer may float vertically in electrolyte its C.G. should be___________? **

27 / 50

**A D.C. series motor is that which______________? **

28 / 50

**Which motor should not be started on no-load ? **

29 / 50

**In a D.C. machine stray loss is the sum of_____________? **

30 / 50

**Which of the following loss in a transformer is zero even at full load ____________? **

31 / 50

**Which of the following is the definition of proportional band of a controller ? **

32 / 50

**The value of flux involved m the e.m.f. equation of a transformer is____________? **

33 / 50

**A high Q tuned circuit will permit an amplifier to have high __________________? **

34 / 50

**Pipes carrying steam are generally made up of_____________? **

35 / 50

**Equipotential planes are_______________? **

36 / 50

**The body of Edison cell is made of___________? **

37 / 50

**In a parallel R-C circuit, the current always________the applied voltage? **

38 / 50

**Artificial draught is produced by____________? **

39 / 50

**A material which is slightly repelled by a magnetic field is known as_____________? **

40 / 50

**The starting winding of a single-phase motor is placed in_________? **

41 / 50

**In pneumatic control systems the control valve used as final control element converts____________? **

42 / 50

**The ratio of intensity of magnetisation to the magnetisation force is known as_____________? **

43 / 50

**Power dissipation in ideal inductor is **

44 / 50

**The applications of selenium rectifiers are usually limited to potential of_____________? **

45 / 50

**A double squirrel-cage induction motor has______________? **

46 / 50

**Find the force acting on a conductor 3m long carrying a current of 50 amperes at right angles to a magnetic field having a flux density of 0.67 tesla **

47 / 50

**The insulating material for cables should____________? **

48 / 50

**In repulsion motor direction of rotation of motor____________? **

49 / 50

**If the field circuit of an unloaded salientpole synchronous motor gets suddenly open-circuited, then **

50 / 50

**Cables for 220 kV lines are invariably____________? **

Provide Your Information