Quiz Step by Step 2. Trades & Technology - Electronics And Electricity

1

A current-to-pressure converter allows the pneumatic-assisted valve to operate over the range of full open to full closed

2

A DPDT switch contact configuration would have two poles, two NC contacts, and two NO contacts

3

The difference between the synchronous speed and the rotor speed is called the ____ of the rotor.

4

In a series RL circuit, ET = 120 V, R = 500 Ω, and XL = 500 Ω. What is the true power?

5

A series RL circuit has two resistors and two inductors. The resistors dissipate 7 W and 12 W. The inductive powers are 15 VARs and 8 VARs. The applied voltage is 240 V. How much is the circuit current?

6

What type of magnet depends on flowing current to produce a magnetic field?

7

A positive level-triggered flip-flop will only accept inputs when the clock

8

Answer the following statement(s) true (T) or false (F)

9

The power rating of a resistor that must dissipate up to 1.1 W should be ________

10

A dc, separately excited motor is driving an elevator. At a load torque of 300 Nm, the motor speed is 100 rpm. The motor terminal voltage is 210 V, and the field constant Kφ is 3 Vs.

11

Which term does not define ac resistance?

12

The exact timing value for any position within the timing range must be ____.

13

The polarity of an induced voltage depends on the ________

14

On a ZigBee network, a reduced-function device can only connect to one full-function device on the network.

15

A _____ plan gives the electrician the ability to know the various parts of a typical building and how to read and interpret the information found on them.

16

The ____ is an international decimalized system of weights and measures used throughout the scientific community.

17

What is the minimum dc working voltage rating for a capacitor that must drop 120 VRMS?

18

Harmonics are produced by loads that draw current in ____.

19

The number of bits required to store a number in BCD ________ the bit

20

The frequency of a wave is best defined as which of the following?

21

________ occurs in satellite transmission when a signal reflects back on itself and causes the sender to hear himself or herself speak, but improved technology has improved cancellation methods, reducing it significantly

22

Answer the following statement(s) true (T) or false (F)

23

In a string array system, there are a number of ____ in the or on the building of the installation.

24

If the voltage applied to a circuit doubles, then power dissipation doubles

25

The speed of an AC squirrel cage induction motor depends on the frequency of the supply current and ____.

26

How many 1 K × 4 chips would be required to produce an 8 K × 16 module?

27

When calculating the power of a pure resistive load, the voltage and current are in phase with each other and the power factor is _____.

28

A delta-delta transformer has a primary voltage of 7200 V and a secondary voltage of 360 V. What is the turns ratio?

29

____________________ pressure sensors are the preferred choice because they can withstand higher overpressure and are more resistant to pressure spikes.

30

The primary motor cortex of the cerebrum is located in the

31

What is the definition of alternating current?

32

Two signals (A and B) are ORed. Their product is then ANDed with signals C and D. Which of the following expressions describes this series of operations?

33

What is a monopole subarray?

34

A particular tachometer displays engine RPMs from zero to 10,000. If the ADC accepts voltage levels from zero to five volts, in order to achieve full-scale representations from the tachometer, what should the output voltage be at 8500 RPM?

35

DSL lines terminate into DSL modems at the customer premises the same way that analog line modems terminate, the key difference between the two technologies being that the ________ modem is always on

36

A(n) ____________________ contains two or more circuits that share a common neutral conductor.

37

When the pinch off voltage is applied to the gate of a JFET, the depletion region becomes large enough that conduction of current through the device stops

38

When VAK of an SUS reaches breakover voltage, the device current (IF) rapidly

39

________ in the digital circuit switch are simply software code written to instruct a switch to perform a particular task

40

Brushless PM motors have become very popular for ____ applications such as air handlers found in the air-conditioning field.

41

On all electric motors, the starting amperage is less than the running amperage because the rotor is stationary on startup.

42

It is important to remember that some sort of ________ jack or block is needed to complete a copper circuit and that many jacks and blocks are also used to provide a cross connect point and test point

43

What are the main components of an alternator?

44

Buffers are used to ensure that the power dissipation of a device driving multiple loads is not exceeded

45

In a combination circuit, the ____ of all individual wattages will equal the total circuit wattage.

46

Describe a resonant circuit.

47

The circular mil area of stranded wire is determined by finding the area of one of the strands and then ____ the number of strands.

48

Answer the following statement(s) true (T) or false (F)

49

The hexadecimal equivalent of a binary 0010111101111110 is ________

50

What is the difference between overload protection and fuse or circuit protection?

Overload protection should not be confused with fuse or circuit protection. Fuses and circuit breakers protect the circuit from some type of high current condition such as shorts and grounds. Overload protection is designed to protect the motor from an overload condition. Assume, for example, that a motor has a full-load current rating of 10 amperes. Also assume that the motor is connected to a 20 ampere circuit. If the motor should become overloaded and the current increase to 15 amperes, the circuit breaker would never trip or the fuse never blow because the current draw is below the 20 ampere rating. The motor, however, will probably be damaged or destroyed because of the excessive current. Overloads are intended to open the circuit when the current exceeds the full-load current rating of the motor by 115 percent to 125 percent.

51

The projections of gray matter extending through the white matter toward the outer surface of the spinal cord are called

52

General purpose processors typically have control lines with which to select system devices

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Quiz Step by Step 2. Trades & Technology - Electronics And Electricity

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