Engineering MCQs Feed 1

P

Priyanka Tomar • 34.20K Points
Instructor I

Q. A unijunction transistor has ?

(A) two anodes and one gate

(B) anode, cathode and a gate

(C) two bases and one emitter

(D) anode, cathode and two gates

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S

Sonali Mishra • 3.40K Points
Extraordinary

Q. A three-phase full-wave half-controlled bridge uses ?

(A) 4 SCRs

(B) 3 SCRS

(C) 2 SCRs

(D) 8 SCRs

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V

Vinay • 27.41K Points
Instructor II

Q. An SCS has ?

(A) two anodes and two gates

(B) three layers and four terminals

(C) four layers and three terminals

(D) one anode, one cathode and two gates

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S

Sonali Mishra • 3.40K Points
Extraordinary

Q. The operation of a thermocouple is based on ?

(A) Seebeck effect

(B) Peltier effect

(C) Thomson effect

(D) Faraday's laws

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P

Praveen Singh • 35.48K Points
Coach

Q. Holding current in PNPN diode is the ?

(A) gate current required to keep the device ON

(B) minimum current to keep the, SCR ON

(C) current at breakover point

(D) minimum current to keep the device OFF

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V

Vijay Sangwan • 27.50K Points
Instructor II

Q. Most SCRs can be turned off by voltage reversal during negative half cycle of the A.C. supply for ?

(A) all frequencies

(B) frequencies upto 200 Hz

(C) frequencies upto 30 kHz

(D) none of the above

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P

Pooja • 3.28K Points
Extraordinary

Q. A voltmeter must have very high internal resistance so that ?

(A) Accuracy is high

(B) Resolution is high

(C) Draws small amount of current

(D) Creates high loading effect circuit

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R

Ravi Shankar • 3K Points
Extraordinary

Q. Errors which may be variable both in magnitude and nature (positive or negative) are classified as ............. error ?

(A) Hysteresis

(B) Random

(C) Interaction

(D) Systematic

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