| 1 |
In an 8085 microprocessor, which one of the
following is the correct sequence of the machine cycles for the
execution of the DCR M instruction? |
| Options |
A) op-code fetch
|
B) op-code fetch, memory read, memory write |
C) op-code fetch memory read
|
D) op-code fetch memory write, memory write |
|
|
|
| Correct Answer |
B |
|
| 2 |
equals |
| Options |
|
|
|
| Correct Answer |
D |
|
| 3 |
Three DC currents I1, I2
and I3 meet at a node with I1entering and I2
and I3 leaving the node. I1 and I2
are measured as 100mA and 99 mA with a ± 1% accuracy. Then the
value of I3 and the accuracy of I3 are |
| Options |
| A) 1 mA ± 2% |
B) 199 mA ± 2% |
| C) 1 mA ± 2% |
D) 1 mA ± 199% |
|
|
|
| Correct Answer |
C |
|
| 4 |
The input-output characteristic of a Schmidt
trigger has a hysteresis band of ± 0.1 V. If the input voltage is 5
sin (1000 pt), the delay between the
corresponding zero cross-over points of the output and input signals
is |
| Options |
| A) 6.37 ms |
B) 0.02 ms
|
| C) 63.7 ms |
D) 2.0 ms |
|
|
|
| Correct Answer |
A |
|
| 5 |
In a spirit level, 2.5mm of movement of the
bubble corresponds to a tilt angle of 25 seconds. The radius of
curvature of the tube of the spirit level is |
| Options |
| A) 52.1 m |
B) 34.4 m |
| C) 26.3 m |
D) 15.6 m |
|
|
|
| Correct Answer |
B |
|
| 6 |
The loop transfer function of a system is given
by G(S)h(s) =
. The phase cross-over frequency is 5 rad/s.
The value of the dead time L is |
| Options |
| A) p/20 |
B) p/10 |
| C) -p/20 |
D) zero |
|
|
|
| Correct Answer |
B |
|
| 7 |
An 8-bit microcontroller has an external RAM is
the memory map from 8000H to 9FFFH. The number of bytes this RAM can
store is |
| Options |
| A) 8193 |
B) 8191
|
| C) 8192 |
D) 8000 |
|
|
|
| Correct Answer |
C |
|
| 8 |
Two copper-constantan thermocouples are
connected such that the two constantan wires are joined together.
The two copper wires are connected to the input of a low noise
chopper stabilized differential amplifier having a gain of 1000.
One of the thermocouple junctions is immersed in a flask containing
ice and water in equal proportion. The other thermocouple is
at a temperature T. If the output of the amplifier is 2.050V,
the temperature T is |
| Options |
| A) 205°C |
B) 102.5°C |
| C) 51.25°C |
D) 50°C |
|
|
|
| Correct Answer |
D |
|
| 9 |
The vectored address corresponding to the
software interrupt command RST7 in 8085 microprocessor is |
| Options |
| A) 0017H |
B) 0027H
|
| C) 0038H |
D) 0700H |
|
|
|
| Correct Answer |
C |
|
| 10 |
For a first order instrument a 5% settling time
is equal to |
| Options |
| A) three times the time constant |
B) two times the time constant
|
C) the time constant
|
D) time required for the output signal to reaches
5% of the final value |
|
| Your Answer |
(Not
Answered) |
| Correct Answer |
A |
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Topic: Instrumentation Engg GATE sample paper
Topic: Instrumentation Engg GATE sample paper
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