A football was inflated to a gauge pressure of 1 bar when the ambient temperature was $$15^\circ C$$. When the game started next day, the air temperature at the stadium was $$5^\circ C$$. Assume that the volume of the football remains constant at 2500 $$cm^{3}$$. Gauge pressure of air to which the ball must have been originally inflated so that it would equal 1 bar gauge at the stadium is _____
SSC JE Mechanical Engineering 2nd March 2017 Shift-1
For the following questions answer them individually
The engine oil at $$150^\circ$$ C is cooled to $$80^\circ$$C in a parallel flow heat exchanger by water entering at $$25^\circ$$C and leaving at $$60^\circ$$ C. The exchanger effectiveness will be
The atomic packing factor is the highest in which of the following cubic lattice system?
The valves mounted on the boilers which change the direction of flow of steam by $$90^\circ$$ and valves fitted in the pipelines which allow the steam in the same direction are respectively called as _____
Which of the following are boiler mountings and not boiler accessories ?
A: Pressure gauge
B: Air preheater
C: Superheater
Entropy is a measure of
Gibbs free energy is considered at which one of the following condition?
In vapour absorption refrigeration systems, which of the following fluids are commonly used?
In a cross compound steam engine ......
Which of the following is expected to have highest thermal conductivity?
A reversible thermodynamic cycle containing only three processes and producing work is to be constructed. The constraints are
A. there must be one isothermal process
B. there must be one isentropic process
C. maximum and minimum cycle pressures and the clearance volume are fixed, and
D. polytropic processes are not followed Then, the number of possible cycles is
Which combination of the following statements is correct?
The incorporation of re-heater in a steam power plant
A: Always increases the thermal efficiency of the plant
B: Always increases the dryness fraction of steam at condenser inlet
C: Always increases the main temperature of heat addition
D: Always increases the specific work output
The amount of heat required to raise the temperature of 1 kg of water from $$0^\circ C$$ to the saturation temperature $$Ts ^\circ C$$ at a given constant pressure is defined as _____.
The enthalpy of steam is defined as ___
What are the advantages of water tube boilers over fire tube boilers?
A. Steam at higher pressures can be produced.
B. More effective heat transfer.
C. Sediment deposition is more.
What is the state, in which none of the properties of the system change with time, known as?
The rate of heat transfer across any plane normal to the x-direction is proportional to the wall area and the temperature gradient in the x-direction. This statement is also referred to as _____
The critical temperature of a pure substance is defined as _____
Which of the following is the correct expression for the maximum thermal efficiency $$(\eta)$$ of a system undergoing a reversible power cycle while operating between thermal reservoirs at temperatures $$T_{c}$$ and $$T_{h}$$
In actual refrigeration systems, the compressor handles vapour only. What is this process commonly referred to as _____
Property of a fluid at zero temperature is referred to as _____
The increase in pressure _____.
The overall efficiency of thermal power plant is _____.
Heat transfer by radiation mainly depends upon _____.
Thermal diffusivity is _____.
Condensing temperature in a refrigerator is the temperature _____
With an increase in the thickness of insulation around a circular pipe, heat loss to surroundings due to _____
For air with a relative humidity of 80% _____
If a mass of moist air in an airtight vessel is heated to a higher temperature, then ........
In a vapour compression refrigeration system, liquid to suction heat exchanger is used to _____.
A right-circular cylinder open at top is filled with water and rotated about its vertical axis at such speed that half the water spills out. What is the value of pressure at centre of the bottom?
At a point on a streamline, the velocity is 3 m/sec and the radius of curvature is 9 m. If the rate of increase of velocity along the streamline at this point is $$\frac{1}{3}$$ m/sec/m, then the total acceleration at this point would be _____
Which of the following statements is correct regarding an impulse turbine?
A draft tube is used with .......
For Newtonian fluid behaviour, the shear stress exerted by the fluid is equal to the _____.
Which of the following are the advantages of impulse turbine over reaction turbines ?
A: Occupies less space per unit power
B: Compounding is not necessary for speed reduction as the rotor speeds are usually low.
C. Suitable for high power generation.
The compressors used in a gas turbine are typically of which type?
Which turbine is also called as the propeller turbine?
According to Bernoulli's principle in fluid dynamics, for inviscid flow, increase in speed of fluid leads to which of the following?
The material commonly used for air craft gas turbine is _____
The difference of absolute pressure and local atmospheric pressure is known as _____
The sum of pressure head and elevation head is known as _____.
Specific gravity is defined as the ratio of density of fluid and density of water at which temperature (in $$^\circ$$ C)
- Falling drops of water become spheres due to the property of _____.
Fluid flow in a straight circular pipe is typically laminar in nature when the Reynolds number is _____.
The reduction in fluid pressure that results when a fluid flows through a constricted section of a pipe is known as _____.
For a compressible flow, Mach Number (M) is given by which of the following expression? where v = velocity of fluid in compressible flow c = speed of sound in air
Which type of forces dominates a fluid flow with a very high Reynolds Number ($$R_e \approx 10000$$)?
To avoid cavitation in centrifugal pumps __
For the continuity equation given by $$\overrightarrow{\triangledown}.\overrightarrow{V} = 0$$ to be valid, where $$\overrightarrow{V}$$ is the velocity vector, which one of the following Is a necessary condition?
Match the items in List I and List II
Match the items in List I and List II
A fluid whose shear stress is linearly proportional to the velocity gradient in the direction perpendicular to the plane of shear is called as _____.
Euler's equation for the motion of liquid assumes that ____
A flow whose stream line is represented by a curve, is called _____
The frictional resistance of a pipe varies approximately with _________of the liquid
The cavitation in a hydraulic machine is mainly due to _____.
The stress, which is responsible for retaining water in a capillary tube above the free water surface of the water body in which the capillary tube is inserted, is called the _____
A flow whose stream line is represented by a curve, is called _____.
A single speed centrifugal pump, feeding a small water supply distribution system of a block of houses, works at _____
In under-damped vibrating system, the amplitude of vibration with reference to time _____
A three rotor system has following number of natural frequencies _____
The figure given below shows a crusher having a cylindrical roller of weight w .The crushing force due to each roller will be :
The principle of direct and reverse cranks is readily applicable to _____.
In order to facilitate the starting of locomotive in any position, the cranks of a locomotive with two cylinders are placed at following angle to each other _____.
The critical speed depends on .......
If a more stiff spring is used in Hartnell governor, then the governor will be _____.
A gear having 100 teeth is fixed and another gear having 25 teeth revolves around it, the centre lines of both gears being joined by an arm. How many revolutions will be made by gear of 25 teeth for one revolution of arm?
The power transmitted by a belt is maximum when the maximum tension in the belt compared to centrifugal tension is _____.
A rotating mass having moment of inertia of 30 $$kgm^{2}$$ rotates at 800 rpm and is travelling in a curve of 170 metre radius at a speed of 240 km/hr. It will experience a gyroscopic reaction of _____.
Throw of a cam is the maximum distance of the follower from:
The following is the inversion of slider crank mechanism
A. Whitworth quick return mechanism
B. Hand pump
C. Oscillating cylinder engine
The horse power transmitted by a belt is dependent upon
A. tension on tight side of belt
B. tension on slack side of belt
C. radius of pulley
D. speed of pulley
Which of the following is a lower pair?
A. Ball and socket
B. Piston and cylinder
C. Cam and follower
The distance between the centres of the rivets in adjacent rows of zigzag riveted joint is known as _____.
A body is resting on a plane inclined at angle 30° to horizontal. What force would be required to slide it down, if the coefficient of friction between body and plane is
0.3?
A satellite is kept on moving in its orbit around the earth due to _____
The tension in the cable supporting a life is more when the lift is _____.
For steel, the ultimate strength in shear as compared to ultimate strength in tension is _____
In a simply supported beam, where the shear force is zero, the bending moment will be _____.
The stress in a body due to suddenly applied load compared to when it is applied gradually is _____.
Modulus of rigidity is defined as the ratio of _____.
The intensity of stress which causes unit strain is called _____
The property of a material by virtue of which a body returns to its original shape after removal of the load is called _____.
For which material the Poisson's ratio is more than unity?
A: steel
B: copper
C: aluminium
D:cast iron
A beam is loaded as cantilever. If the load at the end is increased, the failure will occur _____.
At the principal planes _____.
Two wires AO and BO supports a vertical load W at O as shown in the figure below .The wires are of equal length and equal cross sectional area .The tension in each wire is equal to:
A weight of 500 kgs is held on smooth plane , inclined at $$30^\circ$$ to the horizontal by a force P acting at $$30^\circ$$ above the plane as shown in the figure below .The reaction of plane on the weight will be :
Given figure shows a quick return mechanism.The crank OA rotates clockwise uniformly. OA = 2 cm. OO’ =4 cm. Theratio of time for for-ward motionto that for return motion is:
Binding wire used to support the joints for soldering is made of _____.
Which of the following is not a casting process?
Carburising flame is used to weld metals like _____.
The most commonly used flame in gas welding is
A. Neutral
B. Oxidising
C. Carburising
In braze welding, the filler metal is
A. Distributed by capillary attraction
B. Melted and deposited at the point where the weld is to be made
C. Not required
Magnetic arc blow is _____
Preheating is essential in welding _____.
Tool in the case of ultrasonic machining is made of _____.
Thread rolling is somewhat like _____.
The fatigue strength of metal is improved by setting up compressive stresses in the surface by a process known as _____.
Select the related word/letters/number from the given alternatives.
Wallet : Cash :: Jar : ?
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Select the related word/letters/number from the given alternatives.
Cat : Paws :: Goat : ?
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Select the related word/letters/number from the given alternatives.
Leaf : Leaves :: ?
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Select the related word/letters/number from the given alternatives.
ZAYB : XCWD :: VEUF : ?
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Select the related word/letters/number from the given alternatives.
Mouse : Museums :: Worst : ?
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Select the related word/letters/number from the given alternatives.
Treason : Sonnets :: Bribes : ?
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Select the related word/letters/number from the given alternatives.
78 : 15 :: 67 : ?
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Select the related word/letters/number from the given alternatives.
111 : 120 :: 222 : ?
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Select the related word/letters/number from the given alternatives.
123 : 444 :: 431 : ?
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Select the odd word/letters/number/word pair/number pair from the given alternatives
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Select the odd word/letters/number/word pair/number pair from the given alternatives.
Solution
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Select the odd word/letters/number/word pair/number pair from the given alternatives.
Solution
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Select the odd word/letters/number/word pair/number pair from the given alternatives.
Solution
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Select the odd word/letters/number/word pair/number pair from the given alternatives.
Solution
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Select the odd word/letters/number/word pair/number pair from the given alternatives.
Solution
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Select the odd word/letters/number/word pair/number pair from the given alternatives
Solution
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Select the odd word/letters/number/word pair/number pair from the given alternatives.
Solution
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Select the odd word/letters/number/word pair/number pair from the given alternatives
Solution
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In the given series one word/one term/one number is missing. Select the correct alternative from the given ones that will complete the series.
adDEGT, FbuION, BDcsTY, DFGhjK, ?
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In the given series one word/one term/one number is missing. Select the correct alternative from the given ones that will complete the series.Cream, Ampere, Revenge, Gene, ?
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In the given series one word/one term/one number is missing. Select the correct alternative from the given ones that will complete the series.ire, cowl, moans, sheath, ?
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In the given series one word/one term/one number is missing. Select the correct alternative from the given ones that will complete the series.X, S, N, I, ?
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In the given series one word/one term/one number is missing. Select the correct alternative from the given ones that will complete the series.
cau, dbv, ecw, fdx, ?
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In the given series one word/one term/one number is missing. Select the correct alternative from the given ones that will complete the series.
OOXXXXX, OXOXXXX, XOOXXXX, XOXOXXX, ?
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In the given series one word/one term/one number is missing. Select the correct alternative from the given ones that will complete the series.
7, 5, 2, ?, -7
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In the given series one word/one term/one number is missing. Select the correct alternative from the given ones that will complete the series.
-2, $$\frac{-1}{2}$$, 1, ?, 4
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In the given series one word/one term/one number is missing. Select the correct alternative from the given ones that will complete the series.
29, 31, 37, ?, 43
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- If x < y, w > x and w < z, which of the following must be true?
I. y < w
II. z < x
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The weights of five boxes are 20, 40, 40, 70 & 90 kilograms. Which of the following cannot be the total weight, in kilograms, of any combination of these boxes?
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If the letters N, E, Y, G, S & R are numbered 1, 2, 3, 4, 5 & 6 respectively. Select that combination of numbers so that letters arranged accordingly, form a meaningful word
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If URBANITY is coded as FIYZMRGB, then how will HOW be coded as?
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In a certain code language, 528 means 'leaf is flat', 513 means 'glass is curved', 923 means 'flat or curved'. Find the code for 'or'.
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In a certain code language, '+' represents '$$\times$$', '-' represents '+', '$$\times$$' represents '÷' and '÷' represents '-'. Find out the answer to the following question.
$$0.002 + 8000 - 126 \times 3$$ = ?
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If A % B means A is mother of B, A & B means A is sister of B and A $ B means A is daughter of B, then what does P % Q & R $ S mean?
Solution
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If 91#32 = 7, 83#54 = 4 then find the value of 62#96 = ?
Solution
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Which of the following words follows the trend of the given list?
Goodbye, Popeye, Butyne, Layman, Lychee, ?
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Which of the following terms follows the trend of the given list? OQO, QOQO, OQOQO, ?
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The marathon route goes 6 km South from the starting point. It then turns West and goes 6 kms, then turns North and goes 6 km, finally it turns left and goes 2 km to reach the end point. Where is the end point with reference to the start point?
Solution
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Two children A and B are playing. B is standing 5 m to the North of A. B then walks 10 m East, then turns to his right and walks 8 m. At the same time, A has walked 2 m to the west, then has turned to his left and walked 3 m. Where is B now with respect to the position of A?
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In the question two statements are given, followed by two conclusions, I and II. You have to consider the statements to be true even if it seems to be at variance from commonly known facts. You have to decide which of the given conclusions, if any, follows from the given statements.
Statement 1 : All apples are red.
Statement 2 : Some red things are fruits.
Conclusion I: Some fruits are apples.
Conclusion II: All red things are fruits
Solution
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In the question a statement is given, followed by two arguments, I and II. You have to consider the statement to be true even if it seems to be at variance from commonly known facts. You have to decide which of the given arguments, if any, is a strong argument.
Statement : Should children be allowed to use smartphones?
Argument I : No, Smartphones are addictive, they reduce study time and play time.
Argument II : Yes, The future is about technology. The sooner the children learn how to use technology the better for their and society's future
Solution
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Which of the following cube in the answer figure cannot be made based on the unfolded cube in the question figure?
Which of the following answer figure patterns can be combined to make the question figure?
Which of the following diagrams represent the relationship between Maharashtrians, Asians and Indians?
In the following figure, square represents hindi speakers, triangle represents tamil speakers, circle represents marathi speakers and rectangle represents english speakers. Whichsetof letters represents english speakers who do not speak hindi and tamil speakers who do not speak english?
Which answer figure will complete the pattern in the question figure?
From the given answer figures, select the one in which the question figure is hidden/embedded.
A piece of paper is folded and punched as shown below in the question figures. From the given answer figures, indicate how it will appear when opened.
If a mirror is placed on the line MN, then which of the answer figures is the right image of the given figure?
A word is represented by only one set of numbers as given in any one of the alternatives. The sets of numbers given in the alternatives are represented by two classes of alphabets as shown in the given two matrices, The columns and rows of Matrix-I are numbered from 0 to 4 and that of Matrix-lI are numbered from 5 to 9. letter from these matrices can be represented first by its row and next by its column, for example "U' can be represented by 30, 41 etc and 'E’ can be represented by 85, 67 etc. Similarly, you have to identify the set for the word SWORD".
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Hydrochloric acid in the stomach provides the acidic pH of ________ which is optimal for pepsins.
___________ are the most abundant cells (60-65 per cent) of the total White Blood Cells
In which type of flower the gynoecium occupies the highest position while the other parts are situated below it?
Through which part of the leaves plants lose maximum water?
Consider the following pairs:
Name : Formula
1] Propan-2-ol : $$ CH_{3}CH_{2} CH_{2} CH_{2}CHO $$
2] 1-Bromo-2,2-dimethylpropane :$$ (CH_{3})_{3}CCH_{2}Br $$
3] Methanal : $$HCHO$$
4] Pentanal : $$CH_{3}-CH(OH)-CH_{3}$$
Which of the above pairs are correctly matched?
What is the IUPAC name of n-Propyl fluoride?
Formula for 1,3 butadiene is_____.
Which of the following elements has the highest atomic number?
Which character informs browsers to stop tagging the text (in HTML)?
Using the end key in Microsoft Word, processor moves the cursor to the end of the ___________.
In which state the Feast of St. Francis Xavier festival is celebrated?
The citizens of _______ voted in a referendum to leave the European Union.
Who discovered the neutron in 1932 while working at Cavendish Laboratory ?
The point at which the budget line just touches, one of the ____________ curves would be the consumer's optimum.
Which of the following is true with respect to SMC (Short run marginal cost) and SAC (Short run Average cost) ?
A glass factory hires 11 craftsmen by paying each of them Rs 1100 per day. The 12th craftsman demands Rs 1200 per day. If this craftsman is hired then all other craftsmen must be paid Rs 1200. The marginal resource (labour) cost of the 12th craftsman is ___________.
_______ is the ratio which requires the banks to maintain a given fraction of their total demand and time deposits in the form of specified liquid assets
Net National Product at market prices - Net indirect taxes =
Due to large quantities of nutrients in water an excessive growth of planktonic __________ occurs
Relative contribution of which of the following green house gases is the most towards total global warming?
Radio waves transmitted from the earth are reflected back to the earth by which layer of the atmosphere?
Which of the following is a characteristic of the Subtropical Steppe type of climate?
Which of the following is the son of Shiva and Mohini and was also called as Shastha?
With reference to the interior of the earth and earth quakes consider the following statements
] The earth's crust is brittle in nature.
2] The direction of vibrations of S-waves is parallel to the wave direction.
3] Surface waves are considered to be the most damaging waves
Which of the statements given above is / are correct?
The tectonic plate _________ is located between the Philippine and Indian plate (North of New Guinea)
Our solar system consists of the sun (the star), 9 planets and ________ moons.
Which of the following is a sedimentary rock?
Bajra is cultivated in Northern Indian States during the __________________ cropping season
With reference to India's freedom struggle consider the following statements.
1] Entrepreneurs, such as G.D. Birla opposed the national movement openly.
2] On 26 January 1930, "Independence Day" was observed.
3] The Dandi March ended on 6 April 1930.
Which of the statements given above is / are correct?
_________ (14-37 CE), the second in the long line of Roman emperors, was the adopted son of Augustus
Prabhavati Gupta was the daughter of ______ (c. 375-415 CE), one of the most important rulers in early Indian history.
- Francois Bernier, a Frenchman was associated with the Mughal court, as a physician to Prince Dara Shukoh, the eldest son of Emperor ______.
The twelfth century witnessed the emergence of a new movement in Karnataka, led by a Brahmana named Basavanna (1106-68) who was initially a Jain and a minister in the court of a ___________ king.
Who is known as the founder of psychoanalysis?
Consider the following pairs:
Event : Time interval ( in Seconds)
1] Period of light wave : 10-15
2] Wink of eye : 101
3] Time period of a satellite : 104
4] Revolution period of the earth : 107
Which of the above pairs are correctly matched?
Time period of a simple pendulum, where L is length of the pendulum and g is acceleration due to gravity, is ______.
Wavelength of Infrared waves is smaller than _____.
An object is placed at 20 cm in front of a concave mirror and the image is formed at a distance of 30 cm from the mirror, find the focal length of the mirror
The A quasi-federal form of government of the Indian Constitution are borrowed from the ______________ constitution.
Which of the following countries follows the "First Past the Post" electoral system?
Bhutan is still a _____________.
The People's Republic of China was founded in 1949, following the ______ revolution under the leadership of Mao.
In the Indian Constitution, as per Fundamental Rights, Prohibition of forced labour is a __________
Who is the first Formula One motor racing driver from India?
Who wrote the novel "A Passage to India"?
Octopus belongs to which animal phylum?
Bones have a hard and non-pliable ground substance rich in calcium salts and ________ fibres which give bone its strength.
At 73 metres, which of the following is the world's tallest rubble masonry minaret?
Which of the following is a famous Indian singer?
All of the following are recipients of the Bharat Ratna, except _______.
