Worksheets21ECC503T Embedded control system
Total questions: 15
Worksheet time: 15mins
Name
Class
Date
1.
The speed ω of the D.C machine is almost proportional with the ---------------------
a)
Vmed
b)
Vcc
c)
Vmed/2
d)
Vcc/2
2.
A more sophisticated circuit is the ------- (by Linear Technology) is a low power, high accuracy triple supply monitor with power-fail comparator.
a)
LTC 2822
b)
LTC 2811
c)
LTC 2911
d)
LTC 2922
3.
Embedded systems are designed for specific tasks and often mass-produced they are -----------------------
a)
optimized in size
b)
production costs
c)
performance and reliability
d)
More memory
4.
Current, position, speed and other sensor signals are measured and are fed into the embedded control system. All these functions are situated at the -----
a)
signal processing level
b)
electric power level
c)
mechanical level
d)
Input level
5.
Using the H-bridge a -------- quadrant operation is possible
a)
2
b)
3
c)
4
d)
5
6.
When running full CAN (ISO11898-2) at higher speeds, it is required to terminate the CAN bus at both ends with ---------- resistors
a)
100Ω
b)
120Ω
c)
140Ω
d)
80Ω
7.
The embedded control system provides the ----------- with the correct duty cycle is possible to control the ----------------------and --------------------
a)
stability
b)
right switching sequence
c)
machine speed
d)
direction of movement
e)
B,C,D
8.
For an embedded application, the important boundaries are the ----------------. Within these boundaries the watchdog shall be serviced (re-triggered)
a)
T boundary min and T window max
b)
T boundary max and T window min
c)
S boundary max and S window min
d)
S boundary max and S window min
e)
B
9.
CAN offers high-speed communication rate up to ---------- and thus allows real-time control
a)
1 Mbit/sec
b)
2 Mbit/sec
c)
1.5 Mbit/sec
d)
0.5 Mbit/sec
e)
A
10.
Widely used CAN transceiver chips are -------------
a)
Philips 82C251
b)
TIA1040
c)
TJA1040
d)
Philips 82C151
e)
A,C
11.
CAN message remote frames, Remote Transmission Request (RTR) -------------------------
a)
0
b)
3
c)
2
d)
1
e)
D
12.
If a transmitter determines that a message has not been acknowledged then an ----------------- is flagged
a)
Checksum error
b)
Frame error
c)
Acknowledgement Error
d)
Format error
e)
C
13.
A transmitting node inserts a ---------------------------- . This is called bit stuffing
a)
high bit after five consecutive low bits
b)
high bit after three consecutive low bits
c)
a low after five consecutive high
d)
a low after three consecutive high
e)
A,C
14.
In a CAN network, the maximum number of nodes that can be connected is limited to ---------- nodes.
a)
256
b)
32
c)
64
d)
128
15.
The typical voltage levels for a CAN bus are between ---------- volts.
a)
0 to 5
b)
0 to 3.3
c)
2.5 to 5
d)
0 to 12
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