Time Left - 15:00 mins
DMRC JE/A.M 2018 Electrical Mini Mock 1
Attempt now to get your rank among 818 students!
Question 1
Which one of the following oscillators is well suited for the generation of wide range of audio-frequency sine waves?
Question 2
The amplifier circuit shown in the figure is an example of:
Question 3
Carbon brushes are preferable to copper brushes because…………………
Question 4
A transformer will work on………………….
Question 5
A transformer does not posses………………. Changing property.
Question 6
The armature of a d.c. machine is made of……………….
Question 7
A 4-pole, 50 Hz single-phase induction motor has a slip of 5%. The speed of the motor will be …………..
Question 8
A symmetrical fault occurs on a power system. The percentage reactance of the system on 2500 base kVA is 25%. If the full-load current corresponding to base kVA is 20A, then short-circuit current is
Question 9
An n-type silicon can be formed by adding impurity of:
1) Phosphorous
2) Arsenic
3) Boron
4) Aluminum
Which of the above are correct?
1) Phosphorous
2) Arsenic
3) Boron
4) Aluminum
Which of the above are correct?
Question 10
If the drift velocity of holes under a field gradient of 200 V/m is 100 m/s, their mobility in SI units is
Question 11
Consider a semiconductor carrying current I and placed in a transverse magnetic field B, as shown below. The measured potential across 1 and 2 surfaces is positive at 2. What is the type of material?
Question 12
In low oil circuit breaker, the oil performs the function of
Question 13
The current rating of a fuse is 5 A. The fusing current will be
Question 14
An overcurrent relay having a current setting of 125% is connected to a supply circuit through a current transformer of ratio 400/5. The pick-up current is
Question 15
If the fault current is 2000 A, the relay setting 50% and C.T. ratio is 400/5 A, the P.S.M. is
Question 16
A triplex wave winding will have…………… parallel paths.
Question 17
The armature torque of a d.c. motor running at is and shaft torque is The iron and friction losses are
Question 18
The commutating-pole winding is connected in
Question 19
A 3-phase induction motor with a synchronous speed of develops 5 mechanical h.p. at What is the stator input if the stator loss is
Question 20
A voltmeter gives 120 oscillations per minute when connected to the rotor of an induction motor. The supply frequency is 50 Hz. The slip of the motor is
- 818 attempts
- 5 upvotes
- 12 comments
Tags :
ESE & GATE EEGeneralJun 29ESE & GATE EE