BHEL Engineer Trainee Exam for Mechanical stream previous year solved question paper

Kindly provide me the BHEL Engineer Trainee Exam for Mechanical stream previous year solved question paper…………..

[Kiran Chandar]

As per your request here I am sharing the BHEL Engineer Trainee Exam for Mechanical stream previous year solved question paper:

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 liquid.
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 =p*r/2t
7)A problem in force calculation in a body moving in a inclined surface.
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 6%)
12)Water is available at 10m height. What is the pressure available? (pressure=density*g*height;
p=1000*9.81*10; p=98100N/m2) Ch

13)What will happen if the speed of the centrifugal pump doubles.
14)The unit eV is widely used in ? (Nuclear and atomic physics)
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 works?
19)Bending moment diagram for the UDL is in what shape?
20)Function of the distributor in petrol vehicles? (Spark timing) 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 inefficiency) )Problems
involving with fricition coefficient.
26)Factor of safety = Yeild stress/Working stress. 27)Which is the example of non parallel power
transmission (Universal coupling) 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 parallel?
31) Some questions was asked related to boundry layer and vortex flow.
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)
General Apptitude:

Could you please provide me the previous years paper for ELECTRICAL & ELECTRONICS for BHEL?

[Raman Vij]

BHEL question paper for ELECTRICAL & ELECTRONICS has been given as below:

When a inductive coil connected to a 200 V, 50Hz ac supply with 10A current flowing through it dissipates 1000 watts then which of the following will have least value in ohms
a.) Resistance
b) Reactance
c.) Impedance
d.) None


Oscillator crystal are made of –
a.) Silicon
b.) Germanium
c.) Quartz
d.) None

For small size, high frequency coils, the most common core material is.
a)Air
b)Ferrite
c.) Powdered ion
d.) Steel

A superconductor is a –
a.) A material showing perfect conductivity and Meissner effect below a critical temperature
b.) A conductor having zero resistance
c.) A perfect conductor with highest di-magnetic susceptibility
d.) A perfect conductor which becomes resistance when the current density through it exceeds a critical value

When an inductor tunes at 200 KHz with 624 pF capacitor and at 600 KHz with 60.4 pF capacitor then the self capacitance of the inductor would be –
a) 8.05 pF
b) 10.05pF
c.) 16.01pF
d.) 20.01pF

Sparking occur when a load is switched off because the circuit has high –
a.) Inductance
b.) Capacitance
c.) Resistance
d.) None

Sparking between contacts can be reduced by inserting a –
a.) Resistance in the line
b.) Capacitor in series with contacts
c.) Capacitor in parallel with contacts
d.) None

RF amplifier of an A.M. receiver is normally biased in –
a.) Class ‘A’
b.) Class ‘b’
c.) Class ‘C’
d.) None

The value of gate voltage for the operation of enhancement of only N channel MOSFET has to be –
a.) High positive
b.) High negative
c.) Low positive
d.) Zero

The input gate current of a FET is –
a.) a few microamperes
b.) negligibly small
c.) a few milliamperes
d.) a few amperes