Questions and Answers

 

Questions And Answers  Answers  No.

Question

1

Stokes theorem connects

Options

A) a line integral and a surface integral B) a surface integral and a volume integral C) a line integral and a volume integral D) gradient of a function and its surface integral

Your Answer

(Not Answered) Answered)

Correct Answer

A

2

Match the following Type of Mechanism Motion achieved P. Scott — Russel mechanism 1. Intermittent motion Q. Geneva mechanism 2. Quick return motion R. Off-set slider-crank mechanism 3. Simple harmonic motion S. Scotch Yoke mechanism 4. Straight line motion

Options

A) P-2 Q-3 R-l S-4 B) P-3 Q-2 R-4 S-l C) P-4 Q-l R-2 S-3 D) P-4 Q-3 R-l S-2

Your Answer

(Not Answered) Answered)

Correct Answer

C

3

A solar collector receiving solar radiation at the rate of 0.6 k W/m 2 transforms it to the internal energy of a fluid at an overall efficiency of 50%. The fluid heated to 350 K is used to run a heat engine which rejects heat at 313 K. If the heat engine is i s to deliver 2.5 kW power, the minimum area of the solar collector required would be

Options

A) 8.33m2  B) 16.66m2 C) 39.68m2  D) 79.36m2

Your Answer

(Not Answered) Answered)

Correct Answer

D

4

When the temperature of a solid metal increases,

Options

A) strength of the metal decreaes but ductility increases

B) both strength and ductility of the metal decrease

C) both strength and ductility of the metal increase

D) strength of the metal increases but ductility decreases

Your Answer Correct Answer

5

(Not Answered) Answered) A

A com compa pany ny pr prod oduc uces es tw two o typ types es of to toys ys:: P and and Q. Pro Produ duct ctio ion n tim time e of Q is is twi twice ce th that at of P and and th the e com compa pany ny has a maximum of 2000 time units per day. The supply of raw material is just sufficient to produce 1500 toys (of any type) per day. Toy type Q requires an electric switch which is available @ 600 pieces per day only. The company makes a profit of Rs. 3 and Rs. 5 on type P and Q respectively. For maximization of profits, the

 

daily production quantities of P and Q toys should respectively be Options

A) 100, 500 B) 500, 1000 C) 800, 600 D) 1000, 1000

Your Answer

(Not Answered) Answered)

Correct Answer

C

6

A spherical thermocouple junction of diameter 0.706 mm is to be used for the measurement of temperature of a gas stream. The convective heat transfer co-efficient on the bead surface is 400 W/m2K. Thermophysical properties of thermocouple material are k = 20 W/mK, C = 400 J/kg K and ρ = 8500 kg/m3. If the thermocouple initially tot 30°C is placed in a hot stream of 300°C, the time taken by the bead to reach 298°C, is

Options

A) 2.35 s B) 4.9 s C) 14.7 s D) 29.4 s

Your Answer

(Not Answered) Answered)

Correct Answer

B

7

In a spring-mass system, the mass is 0.1 kg and the stiffness of the spring is 1 kN/m. By introducing a damper, the frequency of oscillation is found to be 90% of the original value. What is the damping coefficient of the damper?

Options

A) 1.2 N.s/m B) 3.4 N.s/m C) 8.7 N.s/m D) 12.0 N.s/m

Your Answer Correct Answer

8

Options

(Not Answered) Answered) C

In a machining operation, doubling the cutting speed reduces the tool life to 1 8 of the original value. The exponent n in Taylor A) B) 1 1 8 4 C) D) 1 1 3 2

Your Answer

(Not Answered) Answered)

Correct Answer

C

9

In a rolling process, sheet of 25 mm thickness is rolled to 20 mm thickness. Roll is of diameter 600 mm and it rotates at 100 rpm. The roll strip contact length will be

Options

A) 5 mm B) 39 mm

 

C) 78mm D) 120mm Your Answer

(Right Answer) Answer)

The values of a function f(x) are tabulated below x f(x) 0 1 10

1 2 2 1 3 10 Using Newton,s forward difference formula, the cubic polynomial that can be fitted to the above data, is B)   B) A)

Options

3

2

2x + 7x -6x + 2

C)   C)

2x3 – 7x2 + 6x - 2 D)   D)

x3 - 7x2 – 6x2 + 1

2x3 - 7x2 + 6x + 1

Your Answer

(Right Answer) Answer)

11

Two tools P and Q have signatures 5°-5°-6°-6°-8°-30°-0 and 5°-5°-7°-7°-8°-15°-0 (both ASA) respectively. They are used to turn components under the same machining conditions. If hp and hQ denote the peak-tovalley heights of surfaces produced by the tools P and Q, the ratio hp/hQ will be

Options

A ) B) C) D)

Your Answer

12

Options

(Right Answer) Answer)

A soldering operation was work-sampled over two days (16 hours) during which an employee soldered 108  joints. Actual working time was 90% of the total total time and the performance rating was estimated to be 120 percent. If the contract provides allowance of 20 percent of the total time available, the standard time for the operation would be A) 8min. B) 8.9 min. C) 10 min D) 12 min.

Your Answer

(Not Answered) Answered)

Correct Answer

D

13

A welding operation is time-studied during which an operator ope rator was pace-rated as 120%. The operator took, on an average, 8 minutes for producing the weld-joint. If a total of 10% allowances are allowed for this operation, the expected standard production rate of the weld-joint (in units per 8 hour day) is

Options

A) 45 B) 50 C) 55 D) 60

Your Answer Correct Answer

(Not Answered) Answered)

A

 

14

In PERT analysis a critical activity has

Options

A) maximum Float B) zero Float C) maximum Cost D) minimum Cost

Your Answer

(Not Answered) Answered)

Correct Answer

B

15

Through holes of 10 mm diameter are to be drilled in a steel plate of 20 mm thickness. Drill spindle speed is 300 rpm, feed 0.2 mm/rev and drill point angle is 120°. Assuming drill overtravel of 2 mm, the time for producing a hole will be

Options

A) 4 Seconds B) 25 seconds C) 100 seconds D) 110 seconds

Your Answer

(Right Answer) Answer)

16

Environment friendly refrigerant R134 a is used in the new generation domestic refrigerators. Its chemical formula is

Options

A) CH C1 F2  B) C2 C13 F3 C) C2 C12 F4  D) C2 H2 F4

Your Answer Correct Answer

(Not Answered) Answered) D

A standard machine tool and an automatic machine tool are being compared for the production of a component. Following data refers to the two machines.  

17 Setup time

Standard

Automatic

Machine Tool

Machine Tool

30 min.

2 hours

Machining time per piece 22 min. Machine rate

5min

Rs. 200 per hour Rs. 800 per hour

The breakeven production batch size above which the automatic machine tool will be economical to use, will be   Options Your Answer

A) 4 B) 5 C) 24 D) 225 (Right Answer) Answer)

 

18

The mec mech hanism of of ma mater eria iall re removal in in EDM pr process is

Options

A) Melting and Evaporation B) Melting and Corrosion C) Erosion and Cavitation D) Cavitation and Evaporation

Your Answer

(Not Answered) Answered)

Correct Answer

A

19

From a pack of regular playing cards, two cards are drawn at random. What is the probability that both cards will be Kings, if the first card is NOT replaced?

Options

A)  A)  1 26 C)   C) 1 169

Your Answer

B)  B)  1 52 D)   D) 1 221

(Not Answered) Answered)

Correct Answer

D

20

The strength of a brazed joint

Options

A) decreases with increase in gap between the two  joining surfaces C) decreases up to certain gap between the two  joining surfaces beyond which it increases

Your Answer Correct Answer

B) increases with increase in gap between the two  joining surfaces D) increases up to certain gap between the two  joining surfaces beyond which it decreases

(Not Answered) Answered) D

Questions And Answers  Answers  No.

Question

1

In PERT analysis a critical activity has

Options

A) maximum Float B) zero Float C) maximum Cost D) minimum Cost

Your Answer

(Not Answered) Answered)

Correct Answer

B

2

Environment friendly refrigerant R134a is used in the new generation domestic refrigerators. Its chemical formula is

Options

A) CH C1 F2  B) C2 C13 F3 C) C2 C12 F4  D) C2 H2 F4

 

Your Answer

(Not Answered) Answered)

Correct Answer

D

3

A solid cylinder (surface 2) is located at the centre of a hollow sphere (surface 1). The diameter of the sphere is 1m, while the cylinder has a diameter and length of 0.5 m each. The radiation configuration factor F 11 is

Options

A) 0.375 B) 0.625 C) 0.75 D) 1

Your Answer

(Not Answered) Answered)

Correct Answer

C

4

For a fluid flow through a divergent pipe pip e of length L having inlet and outlet radii of o f R1 and R2 respectively and a constant flow rate of Q, assuming the velocity to be axial and uniform at any cross-section, the acceleration at the exit is

Options

A)  A)  2Q(R1 - R2) π LR23 

B)  B)  2Q2 (R1 - R2) 3

C) 2 C)  D)  π LR2   D)  2Q (R1 - R2) 2Q2 (R2 - R1) 2 2 π LR25  π LR25  Your Answer

(Not Answered) Answered)

Correct Answer

C

5

An incompressible fluid (kinematic viscosity, 7.4 x 10 -7 m2 /s, specific gravity, 0.88) is held between two parallel plates. If the top plate is i s moved with a velocity of 0.5 m/s while the bottom one is held stationary, the fluid attains a linear velocity profile in the gap of 0.5 mm between these plates; the shear stress in Pascals on the surface of top plate is

Options

A) 0.651 x 10-3 B) 0.651 C) 6.51 D) 0.651 x 103

Your Answer

(Not Answered) Answered)

Correct Answer

B

6

The tool of an NC machine has to move along a circular arc from (5,5) to (10,10) while performing pe rforming an operation. The centre of the arc is at (10,5). Which one of the following NC tool path commands performs the above mentioned operation?

Options

A) N010 G02 X10 Y10 X5 Y5 R5 B) N010 G03 X10 Y10 X5 Y5 R5 C) N010 G01 X5 Y5 X10 Y10 R5 D) N010 G02 X5 Y5 X10 Y10 R5

Your Answer Correct Answer

(Not Answered) Answered) D

 

7

Options

During a Morse test on a 4 cylinder engine, the following measurements of brake power were we re taken at constant speed. All cylinders firing 3037 kW Number 1 cylinder not firing 2102 kW Number 2 cylinder not firing 2102 kW Number 3 cylinder not firing 2100 kW Number 4 cylinder not firing 2098 kW The mechanical efficiency of the engine is A) 91.53% B) 85.07% C) 81.07% D) 61.22%

Your Answer

(Right Answer) Answer)

8

In terms of theoretical stress concentration factor (Kt ) and fatigue stress concentration factor (Kf  ), the notch sensitivity ‘q’ is expressed as

Options

A)  A)  (Kf  -1) (Kt  -1) C)   C) (Kt  -1) (Kf  -1)

Your Answer

B)  B)  (Kf  -1) (Kt   +1) D)  D) (Kf  +1) (Kt  +1)

(Not Answered) Answered)

Correct Answer

A

9

Starting from x0 = 1, one step of Newton-Raphson method in solving the equation x3 + 3x -7 = 0 gives the next value (x1) as B)   B)

Options

A) x1 = 0.5 C) x1= 1.5

Your Answer Correct Answer

10

Options

Your Answer

x1= 1.406 D) x1 = 2

(Not Answered) Answered) C

A maintenance service facility has Poisson arrival rates, negative exponential service time and operates on a  ‘first come first served’ queue discipline. Break downs occur on an average average of 3 per day with a range of zero to eight. The maintenance crew can service an average of 6 machines per day with a range of zero ze ro to seven. The mean waiting time for an item to be serviced would be A)  A)  1 6 day C) 1 day

B)  B)  1 3 day D) 3 days

(Not Answered) Answered)

 

Correct Answer

A

11

The S-N curve for steel becomes asymptotic nearly at  

Options

A) 103 cycles B) 104 cycles C) 106 cycles D) 109 cycles

Your Answer

(Not Answered) Answered)

Correct Answer

C

12

In a rolling process, sheet of 25 mm thickness is rolled to 20 mm thickness. Roll is of diameter 600 mm and it rotates at 100 rpm. The roll strip contact length will be

Options

A) 5 mm B) 39 mm C) 78mm D) 120mm

Your Answer

(Right Answer) Answer)

13

Water at 42°C is sprayed into a stream of air at atmospheric pressure, dry bulb temperature of 40°C and a wet bulb temperature of 20°C. The air leaving le aving the spray humidifier is not saturated. Which of the following statements is true?

Options

A) Air gets cooled and humidified C) Air gets heated and dehumidified

Your Answer

B) Air gets heated and humidified D) Air gets cooled and dehumidified

(Not Answered) Answered)

Correct Answer

B

14

The Th e angl angle e betw betwee een n two two unit unit-ma -magn gnit itud ude e copl coplan anar ar vec vector tors s P(0. P(0.86 866, 6, 0.5 0.500 00,0 ,0)) and and Q(0. Q(0.25 259, 9, 0.9 0.966 66,0 ,0)) will will be be

Options

A) 0° B) -30° C) 45° D) 60°

Your Answer

(Not Answered) Answered)

Correct Answer

C

15

A lot has 10% defective items. Ten items are chosen randomly from this lot. The probability that exactly 2 of  the chosen items are defective is A)   A)

Options

B) 0.1937 0.0036 C) 0.2234 D) 0.3874

Your Answer Correct

(Not Answered) Answered) B

 

Answer

16

Two tools P and Q have signatures 5°-5°-6°-6°-8°-30°-0 and 5°-5°-7°-7°-8°-15°-0 (both ASA) respectively. They are used to turn components under the same machining conditions. If hp and hQ denote the peak-tovalley heights of surfaces produced by the tools P and Q, the ratio hp/hQ will be

Options

A ) B) C) D)

Your Answer

(Right Answer) Answer)

17

For a typical sample of ambient air (at 35° C, 75% relative humidity and standard atmospheric pressure), the amount of moisture in kg per kg of dry air will be approximately

Options

A) 0.002 B) 0.027 C) 0.25 D) 0.75

Your Answer

(Not Answered) Answered)

Correct Answer

B

18

For a fluid flow through a divergent pipe pip e of length L having inlet and outlet radii of o f R1 and R2 respectively and a constant flow rate of Q, assuming the velocity to be axial and uniform at any cross-section, the acceleration at the exit is

Options

A)  A)  2Q(R1 - R2) π LR23  C)   C) 2Q2 (R1 - R2) 2 π LR25 

Your Answer

B)  B)  2Q2 (R1 - R2) π LR23  D)   D) 2Q2 (R2 - R1) 2 π LR25 

(Not Answered) Answered)

Correct Answer

C

19

A mould has a downsprue whose length is 20 cm and the cross sectional area at the base of the downsprue is is 1 cm2. The downsprue feeds a horizontal runner leading into the mould cavity of volume 1000 cm 3 . The time required to fill the mould cavity will be

Options

A) 4.05 s B) 5.05 s C) 6.05 s D) 7.25 s

Your Answer Correct Answer

20

(Not Answered) Answered) B

The values of a functio ion n f(x (x)) are tabulated belo low w x f(x) 0 1 1 2

2 1

 

3 10 Using Newton,s forward difference formula, the cubic polynomial that can be fitted to the above data, is B)   B) 3

2x + 7x -6x + 2

A) Options

2

2x3 – 7x2 + 6x - 2 D)   D)

C)   C) 3

2

3

x - 7x – 6x2 + 1 Your Answer

2

2x - 7x + 6x + 1

(Right Answer) Answer)

Questions And Answers  Answers  No.

Question The following data about the flow of liquid was observed in a continuous chemical process plant   7.5 7.7 7.9 8.1 8.3 8.5

1

Flow rate to

to

to

to

to

to

(litres/sec) 7.7 7.9 8.1 8.3 8.5 8.7 Frequency 1

5

35

17 12 10

Mean flow rate of the liquid is Options

A) 8.00 litres/sec B) 8.06 litres/sec C) 8.16 litres/sec D) 8.26 litres/sec

Your Answer

(Not Answered) Answered)

Correct Answer

C

2

During the execution of a CNC part program block NO20 GO2 X45.0 Y25.0 R5.0 R5.0 the type of tool motion will be

Options

A) circular Interpolation — clockwise B) circular Interpolation — counterclockwise C) linear Interpolation D) rapid feed

Your Answer

(Not Answered) Answered)

Correct Answer

A

3

A component can be produced by any of the four processes I, II, III and IV. Process I has a fixed cost ofRs. 20 and variable cost of Rs. 3 per piece. Process II has a fixed cost Rs. 50 and variable cost of Re. 1 per piece. Process III has a fixed cost of Rs. 40 and variable cost of Rs. 2 per piece. Process IV has a fixed cost of Rs. 10 and variable cost of Rs. 4 per piece. If the company wishes to produce 100 pieces pie ces of the component, from economic point of view it should choose

 

Options

A) Process I B) Process II C) Process III D) Process IV

Your Answer Correct Answer

(Not Answered) Answered) B

4 Options

A ) B) C) D)

Your Answer

(Right Answer) Answer)

5

In an interchangeable assembly, shafts of size 25.000+0.040mm mate with holes of size 25.000 +0.020 mm. The maximum possible clearance in the assembly will be

Options

A) 10 microns B) 20 microns C) 30 microns D) 60 microns

Your Answer

(Not Answered) Answered)

Correct Answer

D

6

A company has two factories S 1, S2 and two warehouses D1, D2. The supplies from S 1 and S2 are 50 and 40 units respectively. Warehouse D1 requires a minimum of 20 units and a maximum of 40 units. Warehouse D2 requires a minimum of 20 units and, over and above, it can take as much as can be supplied. A balanced transportation problem is to be formulated for the above situation. The number of supply points, the number of demand points, and the total supply (or total demand) in the balanced transportation problem respectively are

Options

A) 2, 4, 90 B) 2, 4, 110 C) 3, 4, 90 D) 3, 4, 110

Your Answer

(Not Answered) Answered)

Correct Answer

C

7

A sta stand ndar ard d mac machi hine ne to tool ol an and d an an aut autom omat atic ic mac machi hine ne to tool ol ar are e bein being g com compa pare red d for for the the pr prod oduc ucti tion on of a component. Following data refers to the two machines.  

Setup time

Standard

Automatic

Machine Tool

Machine Tool

30 min.

2 hours

Machining time per piece 22 min. Machine rate

5min

Rs. 200 per hour Rs. 800 per hour

 

The breakeven production batch size above which the automatic machine tool will be economical to use, will be   Options

A) 4 B) 5 C) 24 D) 225

Your

(Right Answer) Answer)

Answer

8

An incompressible fluid (kinematic viscosity, 7.4 x 10 -7 m2 /s, specific gravity, 0.88) is held between two parallel plates. If the top plate is i s moved with a velocity of 0.5 m/s while the bottom one is held stationary, the fluid attains a linear velocity profile in the gap of 0.5 mm between these plates; the shear stress in Pascals on the surface of top plate is

Options

A) 0.651 x 10-3 B) 0.651 C) 6.51 D) 0.651 x 103

Your Answer

(Not Answered) Answered)

Correct Answer

B

9

A weighing machine consists of a 2 kg pan resting re sting on spring. In this condition, with the pan resting on the spring, the length of the spring is 200 mm. When a mass of 20 kg is placed on the pan, the length of the spring becomes 100 mm. For the spring, the un-deformed length 10 and the spring constant k (stiffness) are

Options

A) l0 = 220 mm, C) l0 = 200 mm,

Your Answer

k = 1862 N/m B) l0 = 210 mm, k = 1960 N/m D) l0 = 200 mm,

k = 1960 N/m k = 2156 N/m

(Not Answered) Answered)

Correct Answer

B

10

Match the following with respect to spatial mechanisms. Type of Joint Degrees of constraint P-Revolute. 1. Three Q-Cylindrical 2. Five R-Spherical 3. Four 4. Two 5. Zero

Options

A) P-l Q-3 R-3 C) P-2 Q-3 R-l

Your Answer

B) P-5 Q-4 R-3 D) P-4 Q-5 R-3

(Not Answered) Answered)

Correct Answer

C

11

Environment friendly refrigerant R134a is used in the new generation domestic refrigerators. Its chemical formula is

Options

A) CH C1 F2  B) C2 C13 F3 C) C2 C12 F4  D) C2 H2 F4

 

Your Answer Correct Answer

12

Options

(Not Answered) Answered) D

A company has an annual demand of 1000 units, ordering cost of Us. 100/order and carrying cost of Rs. 100/unit-year. If the stock-out costs are estimated to be nearly ne arly Rs. 400 each time the company runs out-ofstock, the safety stock justified by the carrying cost will be A) 4 B) 20 C) 40 D) 100

Your Answer

13

Options

(Right Answer) Answer)

Which among the NC operations given below are continuous path operations? Arc Welding (AW) Milling (M) Drilling (D) Punching is Sheet Metal (P) Laser Cutting of Sheet Metal (LC) Spot Welding (SW) A) AW, LC and M B) AW, D, LC and M C) D, LC, P and SW D) D, LC, and SW

Your Answer

(Not Answered) Answered)

Correct Answer

B

14

The S-N curve for steel becomes asymptotic nearly at  

Options

A) 103 cycles B) 104 cycles C) 106 cycles D) 109 cycles

Your Answer

(Not Answered) Answered)

Correct Answer

C

15

There are four samples P, Q, R and S, with natural frequencies 64, 96, 128 and 256 Hz, respectively. They are mounted on test setups for conducting vibration experiments. If a loud pure note of frequency 144 Hz is produced by some instrument, which of the samples will show the most perceptible induced vibration?

Options

A) P B) Q C) R D) S

Your Answer

(Not Answered) Answered)

Correct Answer

A

16

A vibr vibrat atin ing g mach machin ine e is iso isola late ted d from from the the flo floor or usi using ng spr spring ings. s. If If the the rati ratio o of exci excita tati tion on fre frequ quenc ency y of vibr vibrat atio ion n of 

 

machine to the natural frequency of the isolation system is equal to 0.5, t he transmissibility of ratio of  isolation is

Options

A) 1 2 C) 4 3

Your Answer

B)  B)  3 4 D) 2

(Not Answered) Answered)

Correct Answer

C

17

When 3-2-1 principle is used to support and locate lo cate a three dimensional work-piece during machining, the number of degress of freedom that are restricted is

Options

A) 7 B) 8 C) 9 D) 10

Your Answer Correct

(Not Answered) Answered) C

Answer

18

A solar collector receiving solar radiation at the rate of 0.6 k W/m2 transforms it to the internal energy of a fluid at an overall efficiency of 50%. The fluid heated to 350 K is used to run a heat engine which rejects heat at 313 K. If the heat engine is to deliver 2.5 kW power, the minimum area of the solar collector required would be

Options

A) 8.33m2  B) 16.66m2 C) 39.68m2  D) 79.36m2

Your Answer Correct Answer

(Not Answered) Answered) D

A fluid flow is represented by the velocity field >

V = ax 19

>

i + ay >

 j Where a is a constant. The equation of stream line passing through a point (1, ( 1, 2) is Options

A) x-2y = 0 B) 2x + y = 0 C) 2x - y = 0 D) x + 2y = 0

Your Answer Correct Answer

(Not Answered) Answered)

C

 

20

A welding operation is time-studied during which an operator was pace-rated as 120%. The operator took, on an average, 8 minutes for producing the weld-joint. If a total of 10% allowances are allowed for this operation, the expected standard production rate of the weld-joint (in (i n units per 8 hour day) is

Options

A) 45 B) 50 C) 55 D) 60

Your Answer Correct Answer

(Not Answered) Answered) A

Some of the aptitude questions are: 1.

SQRT (156.25) * SQRT (14.25) = 35 * X what is the value of X? X = 1.25 

2.

A + 8450 ÷ 650 = 13 + A. What is the value of A? A = 0 

3.

The sum of a number whose ⅛ th is 45. What is the number? Ans: None 

4.

The sum of a 2 digit number is equal to the difference between them. Find how many such numbers are possible? Ans: 10

5.

The sum sum of a 2 digit digit number is is equal to twice the difference between them. them. Find Find how many such numbers are possible?

6.

1000.01 – 100.01 – 10.01 = X. what is X? X = 889.99

7.

0.25% of 10 – 10% of 0.25 = 25% of 100 – 100% of X. What is X? X = 25

8.

One – fifth of two – third of a number number is is equal to 24. What is the number?

9.

100$8 – 2$39 = $319. What is $? $ = None of these 

10. Ajith and Ajay’s age are in the ratio of 3:5. Two years hence, their age are in the ratio 7:11. What is Ajith’s present age? Ajith’s age = 12.

11. The length of a train is is 200m and it crosses a platform of 75m in in 15sec. Another  train with a length of 180m which wh ich is on the opposite direction approaches it. How long it will take to cross the other? 12. (X) – Square, % - Square root, # - Divide, * - Multiply, @ - addition addition and & Subtraction. Find the value of (4)#4%4*4@4 13. Solve 30 – 0.05 *20 +10÷ 5 =?

 

14. A circle of diameter 28 cm. If there is a rectangle of length 56 cm. What is the value of breadth whose areas are equal? Breadth = 44cm 15. A wheel rotates 18 revolutions in 4.5 sec. What are the revolutions of the wheel  per minute? Revolutions = 240

nu mber is equal to 40% of 200. 20 0. What is the number? 16. Solve: 20% of 60%of a number 17. 252 x 253 =? 252 + 3 18. Series: 5 5 7.5 15 37.5 112.5 339.75 X 19. Trisha’s monthly salary is 25% more than Krishna’s salary but 25% less than Payal’s salary. Krishna’s annual income is Rs. 1, 20, 000. What is the monthly income of Payal?   20. There is a seven consecutive odd numbers. What is the number greater than 6 and it is smaller than 6? 

Technical Aptitude:

1.

Work done is Zero for which process? Ans: Constant Volume 

2.

Which cycle has high efficiency? Ans: Otto Cycle 

3.

The power of 2 –stroke engine varies from 4 – stroke engine by______. Ans: Twice 

4.

Sudden reduction in barometer leads to ______. Ans: Storm 

5.

Composition of Stainless steel ____. Ans: Chromium, Nickel … 

6.

Gears are produced in mass production by ______. Ans: Hobbing 

7.

Pick out the wrong statements:  a)

The good fuel should have high calorific value

 b)

Ease in storing 

c)

High ignition point 

 

d)

Low smoke and gases Ans: (C) 

8.

Composition of Gun metal _____. Ans:

9.

Gears are commonly called with _______ Ans: Pitch Circle Diameter 

10. A good fuel should have ________ ignition point. Ans: Low  11. If heat supplied into the the system is 30000 J/S and the power output is 9KW. What is the efficiency of system? Ans:  12. A square rod of 2cm x 2cm of which a force of 8800Kg is acting on it. What is the stress developed in it? Ans: 2200 Kg/cm2 13. GNATT chart shows___________   14. Which is the high efficiency freezing agent? Ans: Freon 22  15. Property of the freezing agent agen t is: Ans: Low boiling point and high melting point  16. A diesel engine, that is, slow speed engine follows which cycle? Ans: Diesel Cycle 17. Hardness is the property of _________. Ans:  18. A Rotary compressor depends on ___________.   19. The potential energy raised upwards ___________ the kinetic energy downwards. Ans: is equal to  20. Centipoise is the unit of ________. Ans: Dynamic Viscosity  21. For a thermodynamic system, the COP is 5 and the heat supplied to the system is 1 KW. What is the work done?  

The technical aptitude questions are given to the students who cleared Aptitude test and it contains 50 questions. After the Technical Aptitude is over, GD was conducted and the students who are short listed are allowed for Technical Interview and HR Interview.

 

Essar Sample Questions In an ideal gas compared to a real gas at very high pressure occupies? Kinetic theory of gases assumes that collisions between the molecules are? The condition of perfect vacuum that is at absolute zero pressure can be attained at? Specific heat of air? Which law states that internal energy is function of Temperature? Minimum work done for an adiabatic process the value of o f n? Air Refrigerator works on? 1 watt = 1Nm/S 1 h.p = ?kw When crude oil heated Which Hydro carbon comes first? What is the purpose of Supercharger? 1Kg of carbon to CO, Amount oxygen required? Horse power per tones of refrigeration? Scale formation on the surface of the boiler tubes due to ? Axial shift in steam turbine occurs due to? Latent heat of vapourization at low pressure and temperature? Shaft revolving in a bearing which pair? Difference between dedendum and addendum? The fatique life of a part can be improved by ? Rotational tendency of force? Acetylene dissolved in ? The frequency of transverse vibration is 3hz then critical speed? More viscous lub oil? Example for Non destructive test? Advantage of V belt? In gear boxes Which type of key is used A structural member subjected to an axial compressive force is called? Pig iron is produced in which furnace? Heat generation of arc welding is due to ? In what angle does an object thrown height will wi ll travel the longest distance? Angle of contact between the journal and bearing? The coupling is required to connect two parallel shaft distance between the shaft is small and variable? Carbon is added to steel to increase its hardness-True/False Wings of airplane are made by--To protect from thrust which type of follower is used? With increase in temperature--- Viscosity of liquid--Heavy machine beds are made of CI for------For shock resistance and vibrations we use ---Rupture strength==== ? Washer is used for------Surface endurance limit depends on (toughness/surface tension/yield strength/surface finish) In a uniformly distributed load of 6n/m over ove r a 5 meter length simply supported beam, be am, the value of  B.M at the point where shear force is zero (17.5/22.5/55/75) Cam size depends on (base circle/pitch circle/prime circle/none) Poisons ratio is higher in (rubber/steel/wood) In drill tool carbon % is (