Electrical engineering HPCL RVUNL ISRO GATE DDFC Previous Year question

Electrical engineering HPCL RVUNL ISRO GATE DDFC Previous Year question

Q1. If we want to represent a relation between number of link currents and number of branch current in a direction graph, we Should .

1.  use incident
2. tie set
3. cut set
4. reduced incident

Q2. which class have higher distoration

1. Class A
2. Class B
3. Class C
4. Class AB

Q3. Poynting vector wattmeter works on _________

1. heating effect
2. Magnetic effect
3. induction effect
4. hall effect

Q4. In a RLC Current Induction is 20 mH and Capacator is 200 micro farad . find the resonance frequency of the circuit

1. 1000 rad/sec
2. 50 rad/sec
3. 250 rad/sec
4. 500 rad/sec

Q5. If the slip in on induction motor is 0.25 and the synchronous speed is 600 rpm the motor speed(in rpm)would be

1. 900
2. 750
3. 125
4. 450

Q6. For armature shunt which one of the following is not a possible requirements.

1. it should have high thermal automativer fore
2. it should carry current without excessive temperature rise
3. its temperature coefficient must be low
4. its resistance should not vary with time

Q7. Which of the following increase study state accuracy

1. phase lead compensator
2. phase lag compensator
3. Integrator
4. Differentiator

Q8. Which of the following instruments totalize events over a specified period of time.

1. Indicating Instruction
2. All type of analog instruction
3. recording instruction
4. integration instruction

Q9. The element have mobility ratio in Germanium is

1.  1.2 : 1
2.  2.8:1
3.  1:1
4.  2:1

Q10. The electron hole mobility ratio in silicon is

1.  1:1
2.  2:1
3.  2.6:1
4.  1.2:1

Q12. Out of the following what happens to the overall gain the system of a closed loop control

system with possative value of Feed back gain.

1. Increase or Decrease
2. Increase
3. No-effect
4. Decrease

Q13. A series or parallel RLC circuit is said to be over damped if

1.  alfa > wn
2.  2alfa=wn
3.  alfa<wn
4.  alfa=wn

Q14. In a BJT collector region width is Maximum when it

   1. collects maximum number of           charge carrier

   2. reduces heat dissipation per unit area out of these

1. only 2 is correct
2. only 1 is current
3. none is correct
4. both 1 and 2 are correct

Q15. For the measurement of high resistance following method are used

 1. loss of charge method

 2. direct deflection method

 3. substitution method

which of the following is/are correct

1. 1 and 2
2. 2 and 3
3. 1 and 3
4. only 1

Also Check - HPCL RVUNL ISRO GATE DDFCL UPCL exam Questions