General Digital /Math

Question 1

Bluetooth uses what standard

Answer 1

Uses it own standard

Question 2

True or False Wrapping a conductive cable around your wrist and grounding it to an outlet can safely construct an electric static discharge (ESD) wrist strap

Answer 2

False

Question 3

If given the octal number of 462; the binary number would be

Answer 3

512 256 128 64 32 16 8 4 2 1
100110010

Question 4

In a hydraulic servo valve oscillation of the valve spool used to improve the response time is called

Answer 4

dither

Question 5

AC is converted from one level of voltage and current to a different level with the same amount of power using a

Answer 5

transformer

Question 6

How would you change the direction of rotation of a three phase motor

Answer 6

reversing the connection of two of the power lines to the motor leads

Question 7

the binary 10101101 converted to decimal
A) 173
B) 1013
C) A13
D) 1215

Answer 7

173

Question 8

Primary voltage of a transformer is 480 volts and the secondary is 240 volts. the turns ration of the transformer is

Answer 8

2:1

Question 9

What is the reactance of a 0.001 microfarad capacitor operated at a frequency of 800 Hz

Answer 9

200000 ohms

Question 10

What item below is not measured in ohms
A) Capacitance
B) Resistance
C) Inductive reactance
D) Impedance

Answer 10

Capacitance

Question 11

typical ESD wrist strap contains what size resistor

Answer 11

1 Megaohm

Question 12

With constant voltage what happens to the power dissipated in a circuit if resistance decreases.

Answer 12

power increases

Question 13

If a surge limiting resistor is burnt out
A) no DC output will come from the low voltage supply
B) expect the high voltage measurement to be high
C) the set must have been struck by lightning
D) replace it with one that has a higher power rating, never replace it with one that has a lower power

Answer 13

no DC output will come from the low voltage supply

Question 14

How many clock pulses are needed to shift a byte of data into and out of an eight-bit serial in- serial out shift register?
A) 16
B) 8
C) 4
D) 12

Answer 14

16

Question 15

Intial content of a 4-bit bip-directional shift register is 0011. The serial input contains 1111. after applying two clock pulses when the control line is set to shift-left mode, and then two clock pulses when the control line is set to shift-right mode.
A)1111
B)0
C)11
D)1100

Answer 15

1111

Question 16

binary number 100101 is serially shifted (LSB) into a four-bit parallel out shift register that has an initial content of 1010. After 6 clock pulses the content becomes?
A) 1001
B) 110
C) 101
D) 1010

Answer 16

1001

Question 17

What is a bit?

Answer 17

short for binary digit 1 or 0

Question 18

value of 12 is represented by 0001 0010 in a numbering system called_____?
A) BCD
B) Binary
C)
D)

Answer 18

BCD

Question 19

To connect an operational amplifier in a common mode configuration you would
A) Connect the inverting and non-inverting inputs together
B) Connect the output to the non-inverting input terminal
C) Ground the output
D) Connect the output to the inverting input terminal

Answer 19

Connect the inverting and non-inverting inputs together

Question 20

Synchronous speed of a rotating magnetic field of an induction motor is determined by the number of stator poles and the ?
A) frequency
B) current
C) torque
D) shaft

Answer 20

frequency

Question 21

A 100 foot section of 300 ohm cable is cut into two equal, 50 foot sections. the impedance of each section is _____?
A) 300 ohms
B) 600 ohms
C) 225 ohms
D) 150 ohms

Answer 21

300 ohms

Question 22

Two 10Kohm resistor are wired in a parallel across a 28VDC power supply. What is the power dissapated by this load?
A)
B)
C)
D)

Answer 22

157 watts

Question 23

Transformer has a secondary voltage of 120 volts. The primary winding has 1800 turns and the secondary has 90 turns. What is the primary voltage?
A) 2400
B) 480
C) 120
D) 1800

Answer 23

2400

Question 24

What are two factors that determine the synchronous sped of the rotating magnetic field of an induction motor?

Answer 24

number of poles
Frequency

Question 25

What is dither?

Answer 25

hydraulic servo used to improve response time and prevent sticking

Question 26

Define impedance matching

Answer 26

process of adjusting the impedance of the source and load to obtain maximum power transfer

Question 27

Which electrical quantity does a meggar measure?
A) resistance
B) voltage
C) current
D) watts

Answer 27

resistance

Question 28

How much current would flow in the following circuit: two voltage sources 12 volts each are connected in parallel supplying power to a 24 ohm load?
A) 2A
B) 4A
C) 1A
D) 0.5A

Answer 28

0.5A

I=V/R

Question 29

Which of the following does not provide surge protection?
A) standby power supply (SPS)
B) power conditioner
C) gas discharge tube
D) and uninterruptable power supply (UPS)

Answer 29

Standby power supply