Regional Maritime University

1 .

An electrical subsystem is made up of

Electric circuits such as windings
Magnetic field in the magnetic cores and airgaps
Mechanically movable parts such as a plunger in a linear actuator and a rotor in a rotating electrical machine
All the above

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2 .

Devices that operate in continuous rotating mode are known to be

Transducers
Continuous force producing devices
Continuous energy conversion equipment
Force producing devices

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3 .

Devices that transform signals into different forms are known as

Transducers
Continuous force producing devices
Continuous energy conversion equipment
Force producing devices

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4 .

Devices that produce forces mostly for linear motion drives, such as relays, solenoids (linear actuators), and electromagnets.

Transducers
Continuous force producing devices
Continuous energy conversion equipment
Force producing devices

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5 .

A magnetic subsystem is made up of

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6 .

A mechanical subsystem is made up of

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7 . Force due to both electric and magnetic forces will influence the motion of charged particles

TRUE
FALSE

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8 . Electromagnetic forces determine all essential features of charged particle acceleration and transport

TRUE
FALSE

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9 . when an emf is induced in the same circuit in which the current is changing the effect is called

same-induction
Mutual-induction
Self-induction

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10 . When the current flowing in one coil induces a voltage in an adjacent coil the effect is known as

adjacent-induction
Mutual-induction
Self-induction

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11 .

In a transformer, the primary and secondary windings are magnetically linked through the

Primary coil
Secondary coil
Core
Tertiary coil

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12 . The current that flows through the core of a tranformer is responsible for

hysterisis current losses
eddy current losses
copper losses
copper current losses

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13 . The current that flows through the windings of a tranformer is responsible for

hysterisis current losses
eddy current losses
copper losses
copper current losses

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14 . The losses in a tranformer due to the reversal of the magnetic molecules in the core are known as

hysterisis current losses
eddy current losses
copper losses
copper current losses

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15 . In a coil, the voltage leads the current

TRUE
FALSE

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16 .

The current used by an electromechanical machine for actual work produces

True power
Apparent power
Reactive power
Magnetic power

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17 .

The current used in an electromechanical machine in its magnetic circuit produces

True power
Apparent power
Reactive power
Magnetic power

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18 . The total current used in an electromechanical devise is the resultant of the current that produces active power and that which produces reactive power

TRUE
FALSE

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19 .

When a transformer is operating at no load the current at the secondary is

Zero
Maximum
Half
Quarter

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20 .

Transformers are usually cooled by

Air
Water
Oil
Grease

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