#1
19th August 2014, 09:36 AM
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DMRC Exam Question Paper
Will you provide the question paper of Delhi Metro Rail Corporation Limited ?
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#2
19th August 2014, 10:24 AM
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Re: DMRC Exam Question Paper
Here I am providing the list of few questions of Delhi Metro Rail Corporation Limited for your idea. 1. Mho relay is usually employed for the protection of a) Short lines only b) Medium lines only c) Long lines only d) Any line Ans: Long lines only 2. A modern power semiconductor device IGBT is combines the characteristics of a) BJT and MOSFET b) FCT and GTO c) SCR and MOSFET d) SCR and BJT Ans: BJT and MOSFET 3. For a single-phase a.c. to d.c. controlled rectifier to operate in regenerative mode, which of the following conditions should be satisfied? a) Half –controlled bridge, α 90°, source of e.m.f. in load c) Full-controlled bridge, α > 90°, source of e.m.f. in load d) Full-controlled bridge, α 90°, source of e.m.f. in load 4. Which is the most suitable power device for high frequency ( more 100 kHz) switching application? a) Power MOSFET b) BJT c) SCR d) UJT Ans: Power MOSFET 5. In a thyristor Latching current is ________ than Holding current a) Equal b) Less c) Greater d) None Ans: Greater 6. The transfer function of a system is 10/(1+s) when operating as a unity feedback system, the steady state error to a step input will be a) 0 b) 1/11 c) 10 d) Infinity Ans: 1/11 7. Which one of the following statements for a dc machine which is provided with inter pole winding (IW) as well as compensating winding (CW) is correct a) Both IW and CW are connected in series with Armature winding b) Both IW and CW are connected in parallel with Armature winding c) IW connected in series but CW is connected in parallel with Armature winding d) CW connected in series but IW is connected in parallel with Armature winding Ans: Both IW and CW are connected in series with Armature winding 8. A 0-10 mA PMMC ammeter reads 5mA in a circuit; its bottom control spring snaps out suddenly the meter will now read. a) 5mA b) 10mA c) 2.5mA d) 0 Ans: 0 9. A dc cumulatively compounded motor delivers rated load torque at rated speed. If series field is short circuited, then the armature current and speed will a) Both increases b) Both decreases c) Increases and decreases d) Decreases and increases Ans: Both increases 10. Moving coil in dynamometer wattmeter connected a) In series with fixed coil b) Across supply c) In series with load d) Across load Ans: Across supply 11. In an induction machine, if the air gap increased a) Speed will be reduced b) Efficiency will be improved c) Power factor will be lowered d) Breakdown torque will be reduced Ans: Power factor will be lowered 12. A CRO screen has ten divisions on the horizontal scale. If a voltage signal 5 sin 314t+45 deg)is examined with a line base settings of 5 msec/div, the number of cycles of signal displayed on the screen will be a) 0.5 cycles b) 2.5 cycles c) 5 cycles d) 10 cycles Ans: 2.5 cycles 13. A 3-phase 50HZ SCIM takes a power input of 30 KW at its full load speed of 1440 rpm. Total stator losses are 1 KW. The slip and rotor ohmic losses at full load are a) 0.02, 600 W b) 0.04, 580 W c) 0.04, 1160 W d) 0.04, 1200 W Ans: 0.04, 1160 W 14. Thermocouple is used to measure a) AC b) DC c) Both d) None Ans: Both 15. The two watt meters measurement the ratio of two meter readings is –(1-sqrt3) 1+sqrt3) then the power factor is a) 1 b) 0.866 c) 0.707 d) 0 Ans: 0.707 16. Hays bridge is used to measure___________ and Schering bridge is used to measure____________ a) Inductance, Inductance b) Inductance, Capacitance c) Capacitance, Inductance d) Resistance, Capacitance Ans: Inductance, Capacitance 17. When sine wave is given as input to Schmitt trigger then its generates a) Sine wave b) Saw tooth wave c) Triangle wave d) Square wave Ans: Square wave 18. In Gauss Seidel method the following factors are influenced for operation a) Acceleration factor b) Selection of slack buss c) Both d) None Ans: Selection of slack buss* 19. i. (X’+Y’) A. Low-pass filter function ii. (X’Y’) B. Sum iii. (XY) C. NAND D. Carry E.NOR a) i-C, ii-E, iii-D b) i-C, ii-E, iii-B c) i-C, ii-B, iii-D d) i-C, ii-E, iii-A Ans: i-C, ii-E, iii-D 20. The phase lead compensation is used to a) Increase rise time and decrease overshoot b) Decrease both rise time and overshoot c) Increase both rise time and overshoot d) Decrease rise time and increase overshoot Ans: Decrease rise time and increase overshoot 21. Voltage feed back amplifier is a a) Shunt-Shunt b) Shunt-Series c) Series-Shunt d) Series- Series Ans: Shunt-Shunt 22. In microprocessor the next instruction to be executed is stored in a) Program Counter b) Stack Pointer c) Memory Pointer d) Accumulator Ans: Program Counter 23. The following element retains it energy after source is disconnected a) Resister b) Inductor c) Capacitor d) Thermistor Ans: 24. In series RLC circuit at resonant a) Voltage is in phase with current b) Current is maximum c) Inductive reactance = Capacitive reactance d) All of the above Ans: All of the above 25.For RC low pass filter R=100 K ohms, C= 5 micro farads then lower cutt of frequency is a) 1 K HZ b) 0 HZ c) 381.3 HZ d) Infinity Ans: 26. V=100Sin (1000t+46 deg), I=2Sin (1000t+80 deg) what are the elements in the circuit a) R=30 ohm, L=30 mH b) R=30 ohm, C=33.3 micro farads c) R=40 ohm, L=30 mH d) R=40 ohm, L=33.3 micro farads Ans: R=40 ohm, L=33.3 micro farads |
#3
24th March 2015, 09:57 AM
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Re: DMRC Exam Question Paper
Will you please provide the Delhi Metro Rail Corporation Junior Engineer Electronics exam Question Paper ?
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#4
24th March 2015, 09:58 AM
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Re: DMRC Exam Question Paper
Here I am providing the list of few questions of Delhi Metro Rail Corporation Junior Engineer Electronics exam Question Paper which you are looking for . 1.The number of digits in octal system is a.8 b.7 c.10 d. none 2..The number of digits in Hexadecimal system is a.15 b.17 c.16 d. 8 3.The number of bits in a nibble is a.16 b.5 c.4 d.8 4.The digit F in Hexadecimal system is equivalent to —— in decimal system a.16 b.15 c.17 d. 8 5.Which of the following binary numbers is equivalent to decimal 10 a.1000 b.1100 c.1010 d.1001 6.The number FF in Hexadecimal system is equivalent to —— in decimal system a.256 b.255 c.240 d.239 7.IC s are a. analog b. digital c. both analog and digital d. mostly analog 8.The rate of change of digital signals between High and Low Level is a. very fast b. fast c. slow d. very slow 9. Digital circuits mostly use a. Diodes b. Bipolar transistors c. Diode and Bipolar transistors d. Bipolar transistors and FETs 10.Logic pulser a. generates short duration pulses b. generate long duration pulses c. generates long and short duration d. none of above 11.What is the output state of an OR gate if the inputs are 0 and 1? a.0 b.1 c.3 d.2 12.What is the output state of an AND gate if the inputs are 0 and 1? a.0 b.1 c.3 d.2 13.A NOT gate has… a. Two inputs and one output b. One input and one output c. One input and two outputs d. none of above 14.An OR gate has… a. Two inputs and one output b. One input and one output c. One input and two outputs d. none of above 15.The output of a logic gate can be one of two _____? a. Inputs b. Gates c.States d. none 16.Logic states can only be ___ or 0. a. 3 b. 2 c.1 d.0 17.The output of a ____ gate is only 1 when all of its inputs are 1 a. NOR b. XOR c. AND d. NOT 18.A NAND gate is equivalent to an AND gate plus a …. gate put together. a. NOR b. NOT c. XOR d. none 19.Half adder circuit is ______? a. Half of an AND gate b. A circuit to add two bits together c. Half of a NAND gate d. none of above 20. Numbers are stored and transmitted inside a computer in a. binary form b. ASCII code form c. decimal form d. alphanumeric form 21.The decimal number 127 may be represented by a. 1111 1111B b. 1000 0000B c. EEH d. 0111 1111 22.. A byte corresponds to a. 4 bits b. 8 bits c. 16 bits d. 32 bits 23.A gigabyte represents a.1 billion bytes b. 1000 kilobytes c. 230 bytes d. 1024 bytes 24. A megabyte represents a. 1 million bytes b. 1000 kilobytes c. 220 bytes d. 1024 bytes 25.. A Kb corresponds to a. 1024 bits b. 1000 bytes c.210 bytes d. 210 bits 26.A parity bit is a. used to indicate uppercase letters b. used to detect errors c. is the first bit in a byte d. is the last bit in a byte 27. Which of these devices are two state. a. lamp b. punched card c. magnetic tape d. all the above The output impedance of of a logic pulser is a. low b. high c. may be low or high d. none of above 28.The number of LED display indicators in logic probe are a.1 b.2 c.1 or 2 d.4 29.In hexadecimal number system,A is equal to decimal number a.10 b.11 c.17 d.18 30.Hexadecimal number F is equal to octal number a.15 b.16 c.17 d.18 31.Hexadecimal number E is equal to binary number a.1110 b.1101 c.1001 d.1111 32.Binary number 1101 is equal to octal number a.15 b.16 c.17 d.14 33.Octal number 12 is equal to decimal number a.8 b.11 c.9 d. none 34.Decimal number 10 is equal to binary number a.1110 b.1000 c.1001 d.1010 35.Binary number 110011011001 is equal to decimal number a.3289 b.2289 c.1289 d.289 36.1111+11111= a.101111 b.101110 c.111111 d.011111 37.Binary multiplication 1*0= a.1 b.0 c.10 d.11 38.110012 -100012= a.10000 b.01000 c.00100 d.00001 39.10112*1012= a.55 b.45 c.35 d.25 40.1110112*100012= a.111101101 b.111101100 c.111110 d.1100110 41.4 bits is equal to a. 1 nibble b.1 byte c. 2 byte d. none of above 42. which is non-volatile memory a. RAM b. ROM c. both d. none 43. The contents of these chips are lost when the computer is switched off? a. ROM chips b. RAM chips c. DRAM chips d. none of above 44.What are responsible for storing permanent data and instructions.? a. RAM chips b. ROM chips c. DRAM chips d. none of above 45. Which parts of the computer perform arithmetic calculations? a. ALU b. Registers c. Logic bus d. none of above |