Prepare for the BHEL Engineer Trainee (ET Electrical) recruitment examination with official previous years' solved question papers across Electric Circuits & Fields, Electrical Machines (Turbo-Generators, Synchronous & Induction Motors, Transformers), Power Systems (Generation, EHV Transmission, Grid Stability & Switchgear Protection), Control Systems, Power Electronics & HVDC Transmission, Electrical & Electronic Measurements, Analog & Digital Electronics, and General Engineering Aptitude.
Marking pattern: +1.00 positive, -0.25 (1/4th) negative marking (Official BHEL Engineer Trainee Computer-Based Test Scheme).
Find the value of $t$ so that the sum of the roots of the equation $7x^{2} + (4t+3)x - 3t - 8 = 0$ is equal to the product of the roots.
What should come in place of the question mark (?) in the given series?
6 19 31 69 131 ?
P, Q and R are three points on the circumference of a circle. If $\overline{PQ} = \overline{PR} = 10\text{ cm}$ and the radius of the circle is 13 cm, then the length of the chord $\overline{QR}$ is:
Based on the English alphabetical order, three of the following four letter-cluster pairs are alike in a certain way and thus form a group. Which letter-cluster pair DOES NOT belong to that group?
(Note: The odd one out is not based on the number of consonants/vowels or their position in the letter-cluster.)
What should come in place of the question mark (?) in the given series?
5 13 41 121 365 ?
In a certain code language, 'MINK' is coded as '7569' and 'MONK' is coded as '6259'. What is the code for 'O' in the given code language?
Read the given statement(s) and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusion(s) logically follow(s) from the statement(s).
Statements:
Some pigs are cameras.
All statues are cameras.
Conclusions:
(I) Some pigs are statues.
(II) All cameras are statues.
A sum of ₹2,128 is to be distributed among X, Y and Z in the ratio of 5:2:7. What will be the difference between X's and Z's shares?
The areas of two similar triangles, $\Delta XYZ$ and $\Delta ABC$, are $36\text{ cm}^2$ and $49\text{ cm}^2$, respectively. If $BC = 21\text{ cm}$, find $YZ$.
If X, Y and Z can do a work in 9 days, 12 days and 18 days, respectively, then how long will they take to complete the work when all three work together?
Read the given statement(s) and conclusions carefully. Assuming that the information given in the statements is true, even if it appears to be at variance with commonly known facts, decide which of the given conclusion(s) logically follow(s) from the statement(s).
Statements:
Some trees are sims.
No sim is a bell.
Conclusions:
(I) Some trees are bells.
(II) Some sims are trees.
A right circular cone of height 45 cm and base radius 24 cm is melted and cast into smaller cones of equal sizes of height 15 cm and base radius 2.4 cm. The number of cones cast is:
A sofa set when sold for ₹22,080 incurred a loss of 8%. At what price should it have been sold to make a profit of 18% on the cost?
The present ages of Ramesh and Mohan are in the ratio 12:5. After six years, their ages will be in the ratio 2:1. Find their respective present ages.
In how much time will the simple interest be $\frac{3}{5}$ of the principal at 12% per annum?
H, I, J, K, W, X, and Y are sitting around a circular table facing the centre of the table. H sits fourth to the right of Y. Only two people sit between X and K when counted from the left of X. J sits third to the left of I. W is an immediate neighbour of I and K. How many people sit between H and W when counted from the left of W?
Seven boxes J, K, L, M, W, X and Y are kept one over the other but not necessarily in the same order. Only four boxes are kept between M and W. Only K is kept above M. Only two boxes are kept between X and L. J is kept immediately above Y. L is not kept immediately above J. Which box is kept fourth from the top?
The marked price of a wallet is ₹500. After allowing a discount of 24% on the marked price, the shopkeeper makes a profit of ₹130. Find the gain percentage.
If the angle of elevation of the sun changes from $45^{\circ}$ to $60^{\circ}$, then the length of the shadow of a pillar decreases by 24 m. The height of the pillar is:
Refer to the following letter, number and symbol series and answer the question that follows. Counting to be done from left to right only.
(Left) # H P W H & $ C A 7 T V & ? 7 G Y 7 W Z M E (Right)
How many such numbers are there each of which is immediately preceded by a symbol and also immediately followed by a letter?
From a point on a circular track 18 km long, P, Q and R started running in the same direction at the same time at the speeds of 3 km/hr, 9 km/hr and 6 km/hr, respectively. Then, on the starting point, all three will meet again after:
Find the median from the following data.
| Marks | 30-40 | 40-50 | 50-60 | 60-70 | 70-80 | 80-90 | 90-100 |
|---|---|---|---|---|---|---|---|
| Freq. | 15 | 13 | 8 | 6 | 15 | 7 | 6 |
Based on the English alphabetical order, three of the following four letter-cluster pairs are alike in a certain way and thus form a group. Which letter-cluster pair DOES NOT belong to that group?
(Note: The odd one out is not based on the number of consonants/vowels or their position in the letter-cluster.)
Five coins whose faces are marked 4 and 5 are thrown. What is the probability of obtaining a total of 22?
The number of employees working in a company is increased by 12% and the wages per head are decreased by 12%. If it results in $k\%$ decrease in total wages, then the value of $k$ is: