Deck 10: Measuring Instruments

Question 1

What meter measures an amount of voltage during a period of time and produces a two-dimensional image?

A) a Wheatstone bridge
B) a bridge circuit
C) an oscilloscope
D) a low impedance voltage tester

Answer 1

C

Question 2

What meter measures resistance?

A) an ammeter
B) an ohmmeter
C) a voltmeter
D) a wattmeter

Answer 2

B

Question 3

Most voltmeters are _____ voltmeters, meaning they are designed to use one meter movement to measure several ranges.

A) full scale
B) single range
C) multirange
D) omnirange

Answer 3

C

Question 4

The resistors are connected in parallel with the meter on some ranges and in series for other ranges w hen a(n) _____ is used.

A) Ayrton shunt
B) current transformer
C) d'Arsonval shunt
D) moving vane transformer

Question 5

A voltmeter has a very _____ resistance connected in series with the meter movement.

A) low
B) high

Question 6

An ammeter is connected in _____ with the load to permit the load to limit current flow.

A) parallel
B) series

Question 7

When the connection of a meter to the circuit changes the entire circuit operation, this is known as the  _____ effect.

A) impedance
B) hatching
C) crossing
D) loading

Question 8

What meter must NEVER be connected to a circuit when the circuit power is turned on?

A) an ammeter
B) a voltmeter
C) an ohmmeter
D) a wattmeter

Question 9

The low-impedance voltage tester is most suitable for use in _____.

A) low voltage circuits
B) low power circuits
C) circuits that have low impedance
D) high power circuits

Question 10

What is one of the most common analog meter movements?

A) d'Arsonval movement
B) moving iron
C) plunger
D) concentric vane

Question 11

A(n) _____ ammeter operates on more than one range by connecting the meter movement to different shunts.

A) full scale
B) single range
C) multirange
D) omnirange

Question 12

The d'Arsonval meter movement is operated by applying _____ current to the coil.

A) AC
B) DC

Question 13

What meter features a wire coil suspended between permanent magnet poles and operates on very tiny amounts of current?

A) a galvanometer
B) a  digital ammeter
C) a  voltmeter
D) a  wattmeter

Question 14

The meter is only connected to one of the lines supplying power w hen using a(n) _____ ammeter.

A) Ayrton
B) d'Arsonval
C) clamp-on
D) shunted

Question 15

Moving coil meter is another name for the _____ meter movement.

A) d'Arsonval
B) moving iron
C) plunger
D) concentric vane

Question 16

A low-resistance device used to conduct most circuit current away from the meter movement is a n ammeter _____.

A) spike
B) shunt
C) resistor
D) limiter

Question 17

The series ohmmeter is used to measure _____  values of resistance.

A) low
B) high

Question 18

What meter is designed to be connected directly across the power source?

A) voltmeter
B) analog meter
C) galvanometers
D) ammeter

Question 19

What meter measures true power in a circuit?

A) ohmmeter
B) wattmeter
C) voltmeter
D) ammeter

Question 20

A test meter that uses a scale and pointer to indicate values is a(n) _____ meter.

A) analog
B) digital

Question 21

What is measured by the Wheatstone bridge?

A) inductance
B) impedance
C) capacitance
D) resistance

Question 22

One of the most common devices used to measure values of resistance, inductance, and capacitance accurately is a(n) _______________ circuit.

Question 23

A shunt device that remains connected to the meter movement and thereby eliminates contact resistance problems is the _______________ shunt.

Question 24

An ammeter has a typical impedance of less than _______________ ohm.