General Digital /Math Flashcards
(29 cards)
Bluetooth uses what standard
Uses it own standard
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
False
If given the octal number of 462; the binary number would be
512 256 128 64 32 16 8 4 2 1
100110010
In a hydraulic servo valve oscillation of the valve spool used to improve the response time is called
dither
AC is converted from one level of voltage and current to a different level with the same amount of power using a
transformer
How would you change the direction of rotation of a three phase motor
reversing the connection of two of the power lines to the motor leads
the binary 10101101 converted to decimal
A) 173
B) 1013
C) A13
D) 1215
173
Primary voltage of a transformer is 480 volts and the secondary is 240 volts. the turns ration of the transformer is
2:1
What is the reactance of a 0.001 microfarad capacitor operated at a frequency of 800 Hz
200000 ohms
What item below is not measured in ohms
A) Capacitance
B) Resistance
C) Inductive reactance
D) Impedance
Capacitance
typical ESD wrist strap contains what size resistor
1 Megaohm
With constant voltage what happens to the power dissipated in a circuit if resistance decreases.
power increases
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
no DC output will come from the low voltage supply
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
16
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
1111
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
1001
What is a bit?
short for binary digit 1 or 0
value of 12 is represented by 0001 0010 in a numbering system called_____?
A) BCD
B) Binary
C)
D)
BCD
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
Connect the inverting and non-inverting inputs together
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
frequency
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
300 ohms
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)
157 watts
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
2400
What are two factors that determine the synchronous sped of the rotating magnetic field of an induction motor?
number of poles
Frequency
