Quiz: Electrical Engineering 03 Dec 2020

Quiz: Electrical Engineering
Topic: Miscellaneous

Each question carries 1 mark.
Negative marking: 1/3 mark
Time: 10 Minute

Q1. The number of output and input pins of 8085 microprocessors are respectively:
(a) 20,20
(b) 27,21
(c) 21,27
(d) None of the above

Q2. In INTEL 8085, while executing a program non-maskable interrupt occurs. The data present on data line is
(a) 00 H
(b) 24 H
(c) 36 H
(d) Can’t be predicted

Q3. Which of these is software interrupt?
(a) RST 4.5
(b) RST 5.5
(c) RST 6.5
(d) RST 5

Q4. When the supply voltage to an induction motor is reduced by 10 %, the maximum torque will be decreased approximately by:
(a) 5 %
(b) 10 %
(c) 19 %
(d) 40 %

Q5. It is given that the starting current of a 3-phase induction motor is 3-times the rated current, while the rated slip is 6%. What would be the ratio of starting torque to full-load torque?
(a) 1
(b) 1.8
(c) O.54
(d) 0.6

Q6. Choose the characteristics which is not related to an ideal op-amp?
(a) Very high gain
(b) Very high input impedance
(c) Very low output impedance
(d) Very low CMRR

Q7. What is the unit of reciprocal of reluctance?
(a) Henry
(b) Henry/ mater
(c) Meter/Henry
(d) Henry^(-1)

Q8. A single phase, half-wave, controlled rectifier has 400 sin⁡〖(314 t)〗 as the input voltage and R as the load. For a firing angle of 60⁰ for the SCR, the average output voltage is
(a) 200/π
(b) 240/ π
(c) 300/ π
(d) 400/ π

Q9. The unit of conductivity is
(a) ohm/m
(b) mho/m
(c) ohm. m
(d) mho. m

Q10. The sensitivity of a PMMC instruments is 10 KΩ/V. If this instrument is used in a rectifier type voltmeter with half wave rectification, the sensitivity will be:
(a) 10 KΩ/V
(b) 9 KΩ/V
(c) 4.5 KΩ/V
(d) 2.2 KΩ/V

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