BEL Placement Papers
BHEL PAPER ON 11th FEBRUARY AT TRICHY
Yesterday i attended the BHEL Engineer Trainee written test
in Mechanical stream. They conducted for four brances in
engineering. Comp sci, ECE, EEE and Mech. In Mechanical
stream there were a total of 240 questions.
120- Technical questions in Mechanical Engineering
120- General Apptitude questions. (Quantitative Aptitude,
Reasoning Ability, Logical thinking, English usage)
The questions were mainly asked in
Theory of machines
If you have strong fundas, u can really do well in this
Following are the questions asked: (I will try to give you
as many questions as i remember)
[One Mark for correct answer, 1/5th for wrong answer. Five
choices were given]
1)Unit of Entropy (J/kg K or kJ/kg K)
2)A mass of 100kg is falling from a height of 1 m and
penetrates the sand into for 1 m. What is the resistance
force given by sand.
3)Ratio of specific heats of air. (1.41)
4)A body weighs 3 kg in air. If it is submerged in a liquid,
it weighs 2.5 kg. What is the specific gravity of the
5)Two cars travell in same direction at 40 km/hr at a
regular distance. A car comes in a opposite direction in
60km/hr. It meets each car in a gap of 8 seconds. What is
the distance between them?
6)A simple problem involing in hoops stress. For sphere: M=
[3/2]*p*V*[density of pressure vessel material/Maximum
working stress it can tolerate] For Thin walled pressure
walls: Hoops stress or stress in the radial direction
7)A problem in force calculation in a body moving in a
8)Composition of bronze. (Copper+zinc)
9)Compostion of stainless steel.(iron+chromium+nickel+carbon)
10)CI is manifactured in which process. (cupola process)
11)What percentage of carbon is preset in pig iron. (4.5 to
12)Water is available at 10m height. What is the pressure
available? (pressure=density*g*height; p=1000*9.81*10;
13)What will happen if the speed of the centrifugal pump
14)The unit eV is widely used in ? (Nuclear and atomic
15)What will happen to the resistance, when the diameter of
the conductor is doubled?
16)The power comsumed by a electrical device is 1000W at
250V, What is the resistance in the device?
(Power= Voltage*current; Current=Power/Voltage, Current,I=1000/250=4
amps. V=IR, Therefore R=250/4=62.5 ohms)
17)Why DC current is not used in transformer.
18)On what principle the sonar/ radar( I dont remember)
19)Bending moment diagram for the UDL is in what shape?
20)Function of the distributor in petrol vehicles? (Spark
21)Which is not present in CI engines? (carburrettor)
22)What will happen if one cylinder recieves more amount of
fuel spray from injectors than other injectors?
23)Purpose of draft tube in hydraulic turbines? (The purpose
of a draft tube is toconvert some of the kinetic energy of
the flow from the runner (the rotating part of the turbine)
intopressure energy and thereby increase the efficiency
ofthe hydro power turbine. )
24)What is the effect or reheater in the gas turbine? (The
advantage of reheater is significantly increased thrust; the
disadvantage is it has very high fuel consumption and
25)Problems in involving with fricition coefficient.
26)Factor of safety = Yeild stress/Working stress.
27)Which is the example of non parallel power transmission
28)For perpendicular shafts worm gear is used.
29)A planet gear with 25 teeth is meshed with a sun gear of
100 teeth. Both are connected using a arm. How many
rotations are needed for planet gear to complete one
rotation around the sun gear?
30)What is equivalent spring constant for spring in
31) Some questions was asked related to boundry layer and
32) 5 questions were asked in PERT, Process planning,
Product planning, Break even analysis.
33)How are tungsten and sintered composite materials are
machined? (Electro Discharge Machining, EDM)
All the sections were very easy. Basic knowledge is
sufficient to attend all the questions. But Keep time factor
in mind and increase your speed. There are 120 questions
--- Detect the words with wrong spellings (5 questions)
---Fill in the blanks with appropriate words(5 questions)
--- Two reading comprehensions were given(10 questions)
---Find the error in the sentence (8 questions)
--- Seating arrangement problems
--- Find the relation between them
All the questions were very easy.
---50% of the questions are from basic geometry.
---Remaining were very general and easy. But as there is a
questions you have have to be really quick.
*****ALL THE BEST*****