BHEL aptitude and engineer trainee ECE sample question papers with Answers – Bharat Heavy Electricals Ltd. Electronics Placement Papers.

BHEL aptitude and engineer trainee ECE sample question papers with Answers or Bharat Heavy Electricals Ltd. Electronics Placement Papers can be checked here for the recruitment in BHEL as Engineer Trainee.

Written Test Details

About the Written Test
1. Written test will consists of 240 multiple choice objective type questions.Test is designed to assess the candidate’s Professional ( Technical) Knowledge of the chosen Engineering Discipline and Higher Aptitude covering area like Quantitative Aptitude, Reasoning Ability, Logical thinking, English usage, General Awareness etc.
1.Your performance in this written test will determine possibility of further considerations of your candidature.
3.There is a specific time limit for Written Test. Candidate will have to answer 240 questions in 2 hours and 30 minutes.
4. For each question, a choice of few alternative answers have been given, out of which only one alternative is correct. You have to choose the alternative, you think to be correct and indicate your choice on the OMR answer sheet.
5.Your admission to this Test is, however, provisional. The candidates are advised to ensure while applying that they fulfill the eligibility criteria and other requirements and that the particulars furnished by them are correct in all respects for the post applied for. Mere appearance at the Test does not entail you to make any claim for the post. You will be treated as debarred ab-initio in case you do not fulfill the essential eligibility criteria.
6. The Answer Sheet is a special OMR (Optical Mark Reader) sheet.
7.Use BLACK or BLUE Ball point Pen ONLY.
8.Every question will carry 1 mark. Negative marking to the extent of 0.2 marks per wrong answer will be applicable.
9. a) For answering the Test questions, there will be CIRCLES in the Answer Sheet. The chosen answer is to be indicated by darkening (encoding) one of the CIRCLES fully. Any other method of answering will be taken as incorrect answer.
For Example, If 10x+6=106, then 15X -10 will be
.     (1) 100 (2)140 (3)110 (4)80 (5) None of the above

Since correct answer is option (2), the CIRCLE 2 will have to be darkened (encoded) to fill the space completely like this:

The following are not correct methods of marking:

b) Darken only in the CIRCLES provided. Please do not make any stray marks on the answer sheet. This will be penalised.
c) Rough work must not be done on the Answer sheet. This will be penalised. You can use the Test Booklet for this purpose.
d) Change / Cutting / Overwriting / Erasing of CIRCLES is NOT permitted.

SAMPLE TEST QUESTION
1. APTITUDE TEST
Directions: In the following question, pick the choice whose meaning is opposite to the word shown in capitals.
1. HOI POLLOI:
(1) Cannibalism (2) Tyranny (3) The past (4) Aristocracy (5) Capitalist
Directions: In the following question, the descriptive sentence is aptly described by just one word. Select the choice which give the meaning most appropriately:
2.One who talks in his sleep:
(1) Somniloquist (2) Somnivocalist (3) Somnambulist (4) Somnalesist (5) None of these
Directions: In each question below you will find three words. The first two words are related to each other in some way. The third word is also related in the same way to one of the four alternatives marked as: (1), (2), (3) and (4). Find it out.
Directions: In each question below you will find three words. The first two words are related to each other in some way. The third word is also related in the same way to one of the four alternatives marked as: (1), (2), (3) and (4). Find it out.
3.REMAIN : STAY LEAVE: ?
(1) Good-bye (2) Run (3) Farewell (4) Depart
4. POET : VERSE SCULPTOR : ?
(1) Artist (2) Chisel (3) Statue (4) Marble
Directions: In each question below you will find words, four of which are alike in some respect; they have something in common and belong to one category. Only one word is different from them; it does not belong to the category to which the other four belong. Which word is different from the rest?
5. (1) Foot ball (2) Cricket (3) Polo (4) Chess (5) Hockey
6. (1) Eye (2) Nose (3) Tongue (4) Finger (5) Liver
7.In a code where a numeral represents an alphabet the most likely code for the word RECESS is:
(1) 913155 (2) 723245 (3) 865277 (4) 233300 (5) 983499
8.If in a code a,b,c, means `try your best’, b,o,p,o means `try again & again’ x,y,a means `all the best’ – Then `your best again’ is represented by
(1) c a o (2) p o c (3) a c p (4) y c a (5) o c y
Directions: In the following question complete the given series
9. 48,24,72,36,108, . . . . . . . . . . .
(1) 110 (2)115 (3) 64 (4) 54 (5) 125
10.Of the following numbers which one is the greatest?
(1) (0.6 x 0.6)-12 (2) 0.004 x 100 (3) (-0.7)4 (4) 0.2 x 0.2
11.Which of the following numbers is least?
(1) (1/4)2 (2) 49 (3) 4-9 (4) 42
12. It costs Rs.4.25 for two adults and their child to attend the Circus. If the child’s ticket is half the price of adult’s ticket, what is the price of an adult’s ticket?
(1) Rs.0.75 (2)Rs. 1.70 (3) Rs.1.75 (4) Rs.1.44
13.If `a’ is less than 50 and ‘b’ is less than 25, it follows that:
(1) a=2b (2) `a` is greater than b (3) a+b is less than 75 (4) a-b =25 (5) None of these

2A. TECHNICAL TEST (for Engineer Trainees)
PART 1 – GENERAL
1.A series combination of Resistance and Capacitor is put across a Thyristor to protect it from:
(1) High Currents (2) High voltage (3) High rate of change of voltage (4) High rate of change of current
(5) Thermal run away
2.A Babbitt is:
(1) An eutectic of iron and iron phosphide
(2) A gadget of measuring volume
(3) Antimony bearing lead or tin alloy
(4) A measure of magnetic induction produced in a material
(5) None of these above
3.An Induction motor is:
(1) Self-starting with zero torque (2) Self-starting with very high torque
(3) Self-starting with smaller torque than the rated torque (4) None of the above

ELECTRONICS ENGINEERING
1.     A 10 Kw transistor is modulated to 80%. The average side band power will be:
(1) 1.8 KW (2) 8 KW (3) 3.2 KW (4) 4.6 KW (5) 4.26 KW
2.     A resonant circuit has the resonance frequency 1 MHz and quality factor, Q, 100. Its 3-db band width is:
(1) 10 KHz (2) 5 KHz (3) 100 KHz (4) 20 KHz (5) None of these

ANSWER KEY :

1. APTITUDE TEST
1(4) 2. (1) 3.(4) 4.(3) 5.(4) 6.(5) 7.(1) 8. (1) 9.(4) 10.(1) 11.(3) 12.(2) 13.(3)
2A. TECHNICAL TEST – PART I – GENERAL
1(3) 2.(3) 3.(3)
PART II – SPECIALISED FIELDS

2.     ELECTRONICS ENGG. 1. (3) 2. (1)

SECTION 1 -BASIC DIGITAL SECTION

1. In order to find out stack fault of a three input nand gate how many necessary input vectors are needed ?
2.What is parity generation ?
3.A nand gate becomes ___ gate when used with negative logic ?
4.What is the advantage of cmos over nmos ?
5. What is the advantage of synchronous circuits over asynchronous circuits ?
6.What is the function of ALE in 8085 ?
7. A voice signal sample is stored as one byte. Frequency range is 16 Hz to 20 Hz. What is the memory size required to store 4 minutes voice signal?
8.What will the controller do before interrupting CPU?
9.In a normalized floating point representation, mantissa is represented using 24 bits and exponent with 8 bits using signed representation. What is range ?
10. The stack uses which policy out of the following? LIFO, FIFO, Round Robin or none of these ?
11.Where will be the actual address of the subroutine is placed for vectored interrupts?
12. Give the equivalent Gray code representation of AC2H.
13. What is the memory space required if two unsigned 8 bit numbers are multiplied ?
14. The vector address of RST 7.5 in 8085 processor is _______.
Ans. 003C (multiply 7.5 by 8 and convert to hex)
15.Subtract the following hexadecimal numbers? 8416 – 2A16
16.Add the following BCD numbers? 1001 and 0100
17.How much time does a serial link of 64 Kbps take to transmit a picture with 540 pixels
18. Give the output when the input of a D-flip flop is tied to the output through the XOR gate.
19.How much time does a serial link of 64 Kbps take to transmit a picture with 540 pixels.
20. Give the output when the input of a D-flip flop is tied to the output through the XOR gate Implement the NOR gate as an inverter.
21. What is the effect of temperature on the Icb in a transistor
22.What is the bit storage capacity of a ROM with a 512*4 organization?
23.What is the reason of the refresh operation in dynamic RAM?s ?
24.Suppose that the D input of a flip flop changes from low to high in the middle of a clock pulse. Describe what happens if the flip flop is a positive edge triggered type?
25.How many flip flops are required to produce a divide by 32 device ?
26.An active HIGH input S-R latch has a 1 on the S input and a 0 on the R input. What state is the latch in?
27. Implement the logic equation Y = C^BA^ + CB^A + CBA with a multiplexer.
(where C^ stands for C complement)
28. Equivalent Gray code representation of AC2H.
29. What does a PLL consist of ?