# Gibilisco:Chapter 3 - Measuring Devices

20 Questions | Total Attempts: 557  Settings  This is the MCQs for Gibilisco:CHAPTER 3 - MEASURING DEVICES

• 1.
The force between two electrically charged objects is called:
• A.

Electromagnetic deflection

• B.

Electrostatic force

• C.

Magnetic force

• D.

Electroscopic force

• 2.
The change in the direction of a compass needle, when a current-carrying wire is brought near, is:
• A.

Electromagnetic deflection

• B.

Electrostatic force

• C.

Magnetic force

• D.

Electroscopic force

• 3.
Suppose a certain current in a galvanometer causes the needle to deflect 20 degrees, and then this current is doubled. The needle deflection:
• A.

Will decrease

• B.

Will stay the same

• C.

Will increase

• D.

Will reverse direction

• 4.
One important advantage of an electrostatic meter is that:
• A.

It measures very small currents

• B.

It will handle large currents

• C.

It can detect ac voltages

• D.

It draws a large current from the source

• 5.
A thermocouple:
• A.

Gets warm when current flows through it

• B.

Is a thin, straight, special wire

• C.

Generates dc when exposed to light

• D.

Generates ac when heated

• 6.
One advantage of an electromagnet meter over a permanent-magnet meter is that:
• A.

The electromagnet meter costs much less

• B.

The electromagnet meter need not be aligned with the earth’s magnetic field

• C.

The permanent-magnet meter has a more sluggish coil

• D.

The electromagnet meter is more rugged

• 7.
An ammeter shunt is useful because:
• A.

It increases meter sensitivity

• B.

It makes a meter more physically rugged

• C.

It allows for measurement of a wide range of currents

• D.

It prevents overheating of the meter

• 8.
Voltmeters should generally have:
• A.

Large internal resistance

• B.

Low internal resistance

• C.

Maximum possible sensitivity

• D.

Ability to withstand large currents

• 9.
To measure power-supply voltage being used by a circuit, a voltmeter
• A.

Is placed in series with the circuit that works from the supply

• B.

Is placed between the negative pole of the supply and the circuit working from the supply

• C.

Is placed between the positive pole of the supply and the circuit working from the supply

• D.

Is placed in parallel with the circuit that works from the supply

• 10.
Which of the following will not cause a major error in an ohmmeter reading?
• A.

A small voltage between points under test

• B.

A slight change in switchable internal resistance

• C.

A small change in the resistance to be measured

• D.

A slight error in range switch selection

• 11.
• A.

33,000 Ω

• B.

3.3 KΩ

• C.

330 Ω

• D.

33 Ω

• 12.
The main advantage of a FETVM over a conventional voltmeter is the fact that the FETVM:
• A.

Can measure lower voltages

• B.

Draws less current from the circuit under test

• C.

Can withstand higher voltages safely

• D.

Is sensitive to ac as well as to dc

• 13.
Which of the following is not a function of a fuse?
• A.

To be sure there is enough current available for an appliance to work right

• B.

To make it impossible to use appliances that are too large for a given circuit

• C.

To limit the amount of power that a circuit can deliver

• D.

To make sure the current is within safe limits

• 14.
A utility meter’s motor speed works directly from:
• A.

The number of ampere hours being used at the time

• B.

The number of watt hours being used at the time

• C.

The number of watts being used at the time

• D.

The number of kilowatt hours being used at the time

• 15.
• A.

Voltage

• B.

Power

• C.

Current

• D.

Energy

• 16.
A typical frequency counter:
• A.

• B.

Is usually accurate to six digits or more

• C.

Works by indirectly measuring current

• D.

Works by indirectly measuring voltage

• 17.
A VU meter is never used for measurement of:
• A.

Sound

• B.

Decibels

• C.

Power

• D.

Energy

• 18.
The meter movement in an illumination meter measures:
• A.

Current

• B.

Voltage

• C.

Power

• D.

Energy

• 19.
An oscilloscope cannot be used to indicate:
• A.

Frequency

• B.

Wave shape

• C.

Energy

• D.

Peak signal voltage

• 20.
The display in Fig. 3-18 could be caused by a voltage of:
• A.

6.0 V

• B.

6.6 V

• C.

7. 0V

• D.

No way to tell; the meter is malfunctioning

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