Power Generator

81. Leclanche cell is the other name of

1. lead acid cell
2. zinc chloride
3. carbon zinc cell
4. mercuric cell

View answer

82. low speed alternators are driven by

1. hydraulic turbines
2. steam turbines
3. steam engines
4. diesel engines

View answer

83. Machine in which torque is produced by the interaction of ac current in the stator and dc currents in the rotor turning synchronism

1. synchronous motor
2. induction motor
3. squirrel cage motor
4. stepper motor

View answer

84. Majority of alternators in use have

1. revolving ac armature winding
2. stationary field type construction
3. revolving field type construction
4. stationary ac armature winding

View answer

85. Nickel-iron cells is a secondary cell with a nominal open- circuit voltage output of 1.2 and is otherwise known as

1. Leclanche cell
2. Galvanic cell
3. Voltaic cell
4. Edison cell

View answer

86. One of the following is a false statement

1. storage cell has a reversible chemical reaction
2. carbon zinc cell has unlimited shelf life
3. lead acid cell is rechargeable
4. primary cell is not rechargeable

View answer

87. Overheating of a dc motor is often due to

1. insufficient end play
2. overloads
3. loose parts
4. rough commutator

View answer

88. Silver cadmium is secondary cell with a nominal opne circuit voltage of

1. 1.1V
2. 1.2V
3. 1.5V
4. 1.35V

View answer

89. Small Dc machines generally have ___________ poles

1. 4
2. 2
3. 6
4. 8

View answer

90. The ac armature winding of an alternator is

1. always star connected
2. star delta connected
3. generally delta connected
4. pi connected

View answer