Screening Exam.Paper Junior Engineer Mechanical 2018

By | November 29, 2018

Download Solved Exam. Paper J.E.Mechanical 2018

This is the paper of J.E.Mechanical.This exam. paper held on october 2018.In this exam. paper total 170 questions asked which are in 85 marks.

Download Screening Test JE Mechanical 2018

Ques:- The co-efficient of friction is the

Ans:- Ratio of limiting friction and normal reaction

Ques:- If the arm of couple is doubled, them moment of that couple would

Ans:- Be doubled

Ques:- When trying to turn a key into the lock, which of the following is applied ?

Ans:- Couple

Ques:- A body weighing 200 N is placed on a rough horizontal plane. If the value of co-efficient of friction is 0.6 then the normal reaction will be

Ans:- 200 N

Ques;- Thermoplastic materials are those materials which

Ans:- Do not become hard with the application of heat and pressure and result in permanently hard product

Ques:- The maximum stress induced due to suddenly applied is………………the stress induced when the same load is applied gradually.

Ans:- Twice

Ques:- The factor of safety depends Upon

Ans;- Nature of loading, frequency of variation of load, Degree of reliability required.

Ques:- The force is completely defined when we specify its

Ans:- Magnitude, Direction, Point of application

Ques;- Dynamic friction as compared to static friction is

Ans;- Less

Ques:- The setting of tools in advance at a far from the machine tool or off-line in special holders is known as

Ans:- Pre-set tools

Ques:- CAPP in CNC Machines Automation stand for

Ans:- Computer Aided Part programming

Ques:- A Nozzle is said to divergent nozzle

Ans:- When the cross-section of the nozzle increases continuously from entrance to exit

Ques:- The objective of caulking in a riveted joint is to make the joint

Ans:- Leak proof

Ques:- The centre to centre distance between two consecutive rivets in a row is called

Ans:- Margin

Ques:- The transverse fillet weld is design for

Ans:- Tensile strength

Ques:- A cotter is used to transmit

Ans:- Axial tensile and compressive loads

Ques:- The bending moment at the free end of a cantilever beam is

Ans:- Zero

Ques:- When the shear force diagram is parabolic curve between two points it indicates that there is a

Ans:- uniformly varying load between the two points.

Ques:- The maximum production of small and slender parts is done by

Ans:- Multispindle automatic lathe

Ques:- Buckling load for a given column depends upon

Ans:- Area of cross-section of the column, Length and radius of gyration of the column, modulus of elasticity for the material of the coilumn

Ques:- A column that failure due to direct stress is called

Ans:- short column

Ques:- The Rankine’s constant fpr mild steel column with both ends hinged is

Ans:- 1/7500

Ques:- Which of the following is case hardening process ?

Ans:- Nitriding

Ques;- The main task of battery in automobile is to

Ans:- Supply a large amount of power to turn the starter motor when the engine is being started

Ques:- In the psychometric chart specific humidity (moisture content) lines are

Ans:- Horizontal and uniformly spaced

Ques:- Mechanical efficiency of a centrifugal pump is the ratio of

Ans:- Energy available at the impeller to the energy supplied to the pump by the prime mover

Ques:- The flow in a pipe or channel is said to be uniform when

Ans:- The liquid particles at all sections have the same velocities

Ques:-Head developed by the centrifugal pump is

Ans:- Proportional to speed of impeller

Ques:- The shell of Cochran boiler is made hemispherical

Ans:- To give maximum space and strength, To withstand the pressure of steam inside the boiler

Ques:- Lancashire boiler is

Ans:- Stationary fire tube boiler, Internally fire tube boiler, horizontal boiler.

Ques:- Locomotive boiler is

Ans:- multi tubular, horizontal, internally fired mobile boiler.

Ques:- A Nozzle is said to convergent nozzle

Ans:- when the cross-section of the nozzle decreases continuously from entrance to exit

Ques:- The purpose of governing in the steam turbine is to

Ans:- Maintain the speed of the turbine

Ques:- The effect of bleeding is that

Ans:- it increases the thermodynamic efficiency of the turbine, boiler is supplied with hot water, it decreases the power development by the turbine

Ques:- The brown smoke during the operation of a Bessemer converter indicates that the

Ans:- Air is burning out silicon and manganese

Ques:- A leaf spring in automobile is used

Ans:- To absorb shock

Ques:- Deep groove ball bearings are used for

Ans:- combined thrust and radial loads at high speeds

Ques:-In basic Bessemer, the furnace is lined with

Ans:- a mixture of tar and burnt dolomite bricks

Ques:- The chart which gives an estimate about the amount of material handling between various work station is known as

Ans:- travel chart

Ques:- Which of the following is the principles of material handling ?

Ans:- Keep all handling minimum, Select only efficient handling equipment, move the heaviest weight to the least distance

Ques:- Scheduling

Ans:- Determines the programme for the operations.

Ques:- In manufacturing management the term “dispatching” is used to describe

Ans:- Dispatch of the work orders through shop floor

Ques:- Value analysis is particular of interest when

Ans:- Production is large.

Ques:- Which of the following chart gives simultaneously information about the progress of the work and machine loading ?

Ans:- Man-Machine chart

Ques:- Hydraulic ram is device used to

Ans:- to lift small quantity of water to a greater height when a large quantity of water is available at smaller height.

Ques:- According to the law of moments, if a number of coplanar  forces acting on a particle are in equilibrium then

Ans:- The alegebraic sum of their moments about any point in their plane is zero

Ques:- Blow-off cock in boiler is used to

Ans:- Empty the boiler when required and discharge the mud, scale or sediments which are accumulated at the bottom of the boiler

Ques:- A bolt of size M24 MULTIPLY 2 means that

Ans:- The nominal diameter of the bolt is 24 mm and pitch is 2 mm

Ques:- The principle of transmissibility of the forces states that, when a force acts upon a body, its effects is

Ans:- Minimum, if acts at the center of grtavity of the body

Ques:- In an inward reaction flow turbine

Ans:- The water enters the wheel at the outer periphery and then flows towards the center of the wheel

Ques:- For the same maximum pressure and temperature,

Ans:- Diesel cycle is more efficient than Otto Cycle

Ques:- The compression ratio is the ratio of

Ans:- Total volume to clearance volume

Ques:- The resultant of two forces P and Q such as P >Q acting along the same straight line, but in opposite direction is given by

Ans:- P-Q

Ques:- Hard steering may be due to

Ans:- Tyre pressure too low, Steering gear adjusted too tightly, Incorrect wheel alignment

Ques:- Co-efficient of friction depends upon

Ques:- Nature of surface only

Ques:- The acetylene cylinder is usually painted with

Ans:- Maroon colour

Ques:- Which of the following property is desirable for material used in tools and machines ?

Ans:- Elasticity

Ques:- The process in which hydrocarbons are decomposed into smaller hydrocarbons is called

Ans:- Cracking

Ques:- The gas used in modern shock absorbers is

Ans:- Nitrogen

Ques:- Coolant pumps are of

Ans:- Centrifugal type

Ques:- The radiator tubes are manufactured by using

Ans:- Brass tubes

Ques:- Engine torque is highest at

Ans:- Intermediate speed

Ques:- The most commonly used material for tyre tubes is

Ans:- Butyl

Ques:- Which of the following can be done to reduce the cold corrosion of main Engine cylinder liners using high sulphur fuel oil ?

Ans:- Using high TBN cylinder oil

Ques:- Copper tubing is used in refrigerant system because

Ans:- It has less internal resistance

Ques:- The machinery which is usually tested first once the ship reaches a dry dock is

Ans:- Engine room crane

Ques:- Which of the following instruments is used to measure rudder carrier bearing wear down ?

Ans:- Trammel

Ques:- During flooding of a dry dock which of the following items must be verified ?

Ans:- All sea valves are operational., All overboard discharge valves are operational., Stern tube seal are operational.

Ques:- Cladding is the process used for

Ans:- Protection of metal surfaces against corrosion.

Ques:- Weather radar operates in which bands of radar frequencies ?

Ans:- C and X-band

Ques:- The design aspect ratio for a conventional airplane is a compromise between

Ans:- Aerodynamics and structures

Ques:- The wings of an airplane are designed to provide

Ans:- Lift

Ques:- The angle between north and the flight path of the aircraft is the

Ans:- Heading

Ques:- Which one among the following is most widely accepted as the homeland of Indo-Aryans ?

Ans:- Central Asia

Ques:- The whole area of Harappan culture represents a

Ans:- Triangular area

Ques:- Shravasti was the capital of

Ans:- Koshala

Ques:-  Which ruler built the famous rock-cut temple of Shiva at Ellora ?

Ans:- Krishna 1

Ques:- Which of the following Sultans wrote his autobiography ?

Ans:- Firoz Tughlaq.

Ques:- Who is considered the second founder of the Maratha state ?

Ans:- Baji Rao

Ques:- What was the symbol  of the Swedeshi movement ?

Ans:- Charkha

Ques:- Who made the ‘Deepavali Declaration’ and when ?

Ans:- Lord Irwin in 1929

Ques:- Loess is an example of

Ans:- Aeolian rocks

Ques:- Which of the following seismic waves effect only the surface of the earth ?

Ans:- Surface waves

Ques:- Which of the following regions receives maximum rainfall in winters ?

Ans:- Mediterranean regions

Ques:- The period of the farthest distance between the moon and the earth is called

Ans:- Apogee

Ques:- Those animals which derive their food exclusively from plants are called

Ans:- Herbivores

Ques:- The homeland of Kirghiz tribe is

Ans:- Central Asia

Ques:- Which type of crops are mainly grown in shifting cultivation ?

Ans:- Food crops

Ques:- The Nag Tiba is the mountain range of the

Ans:- Lesser Himalaya

Ques:- Which river divides the Deccan Tableland from northern India ?

Ans:- Narmada

Ques:- Which of the following areas is not affected by the monsoon of the Arabian Sea Branch ?

Ans:- The Punjab Plain

Ques:- Which of the following types of soils is most suitable for tea cultivation ?

Ans:- Alluvation soils

Ques:- Which of the following states is a leading producer of woollen textiles ?”

Ans:- Punjab

Ques:- Which provision of the fundamental rights is directly related to the exploitation against children ?

Ans:- Article 32

Ques:- The authority to specify as to which castes shall be deemed to be Scheduled Castes rests with which of the following ?

Ans:- The President

Ques:- Which amendment of the Indian constitution restricts the size of the union Ministry ?

Ans:- 91st Amendment

Ques:- Comptroller and Auditor-General of India is appointed by

Ans:- The President

Ques:- Which one of the following bills must be passed by each House of the Indian Parliament separately by special majority ?

Ans:- Constitutional Amendment Bill

Ques:- The disputes regarding the election of the president and vice president of India are decided by the

Ans:- Supreme Court

Ques:-“NABARD” was established in which five year plan?

Ans:- Sixth.

Ques:- National Renewal Fund was constituted for the purpuse of

Ans:-Restructuring and modernization of industries

Ques:- Who formulates the monetary policy in India ?

Ans:-NITI Aayog

Ques:-Which of the following is not a source of tax revenue collected by the Government of India ?

Ans:- Dividends and Profits

Ques:- The gaseous fuel which does not contain carbon dioxide is

Ans:- Natural gas

Ques:-The glouse level in the blood is controlled by

Ans :- Insulin

Ques:- The organ affected by diptheria is

Ans:- None of these

Ques:-Pain relieving drugs are known as

Ans:- Analgesics

Ques:- Pointing towards a lady in a photograph Vimalsaid,”she is the daughter of my grandfather’s only son.” How is Vimal related to her?

Ans:-Brother

Ques:- Sudha’s number is 11th from downward ina class of 31 students.What willbe her number from upwards

Ans:- 21st

Ques:- The largest natural lake of H.P. is

Ans:- Renuka

Ques:- The famous Mohan Park is located at

Ans:- None of these

Ques:- Who was the Raja of Bilaspur in 1682, when Guru Govind Singh visited the territory ?

Ans:- Bhim chand

Ques:- Which district in H.P. is famous for fraternal polyandry ?

Ans:- Kinnaur

Ques:- Which of the following is the India’s first underwater robotic drone ?

Ans:- Eye ROV TUNA

Ques:- Which of the following technology initiatives has recently launched by the Union Government for coffee growers ?

Ans:- Coffee Connect

Ques:- Indian men’s hockey team defeated which country to win bronze at the 2018 Jakarta Asian Games ?

Ans:- Pakistan

Ques:- Which State government has decided to provide free mobile phones to women of BPL families ?

Ans:- Rajasthan

Ques:- You must get rid…………..unnecessary things.

Ans:- of

Ques:- Antonym of the word ‘Robust’ is

Ans:- Weak

Ques:- Meaning of the idiom ‘To draw the long bow’ is

Ans:- To exaggerate

Ques:- The initial tension (in newton) in a bolt used for making a fluid tight joint like steam engine cover joints is calculated by which of the following relation in which ‘d’ is the nominal diameter of bolts in mm

Ans:- 2840 d

Ques:- Welding takes place by

Ans:- Coalescence between the parts to be joined.

Ques:- The core diameter of the thread is equal to which of the following in which ‘d’ is the diameter of the bolt ?

Ans:-0.58 d

Ques:- Square thread is usally found on

Ans:-feed mechanism of a machine tools

Ques:-The units of modulus of elasticity is same as those of

Ans:- stress, pressure and modulus of rigidity

Ques:-The shearforce of a cantilever beam of length ‘/’ carrying a uniformly distributed laoad of wper

Ques:- The hoop stress in a thin cylindrical shell is

Ans:- cirumferential tensile stress

Ques:- The assumption made in Euler’s column theory is that

Ans:- All of these

Ques:- Euler’s column formula holds good for

Ans:-long columns

Ques:- Acolumn is said to be short column ,when

Ans:- the ratio of its length to the least radius of gyration is less than 80.

Ques:- The material in which the atoms are arranged chaotically is called

Ans:-Amorphous material

Ques:- The material in which the atoms are arranged regularly in some directions but not in orders is called

Ans:-mesomorphous material

Ques:-The purpose of heat treatment is to

Ans:-Any one of these

Ques:-Aperfect black body is one which

Ans:-absorbs heat radiations of all wavelengths falling on it

 

Ques:- Reynold number is the ratio of

Ans:-intertia force to viscous force

Ques:-The specific gravity of water is

Ans:- 1

Ques:-The by- pass factor of a cooling coil decrease with

Ans:-decrease in fin spacing and increase in number of rows

Ques:-During heating and dehunmidification process  dry bulb tempreature

Ans:-increase

Ques:-The centrifugal compressors are generally used for refrigerants that require

Ans:- large displacements and low condensing pressures

Ques:-The mass per unit volume of a standard temperature and pressure is called

Ans:-mass density

Ques:-The intensity of pressure at any points in a liquid is

Ans:- directly proportional to the depth of the liquid from the surface

Ques:- The Bernoulli, s equation based upon the assumption that

Ans:-There is no loss of energy of the liquid flowing, The velocity of flow is uniform across any cross-section of the pipe, No force except gravity acts on the fluid.

Ques:- Overall efficiciency of  a centrifugal pump is the ratio of

Ans:- actual work done by the pump to the energy supplied to the pump by the prime mover

Ques:- The centrifugal tension in the belts

Ans:- have no effects of power transmitted

Ques:-The maximum fluctuation of energy is the

Ans:- Difference between the maximum and minimum energies.

Ques:- Watts governer can work satisfactorily at speed from

Ans:- 60 to 80 r.p.m

Ques:- In the law of machine P=mw+C

Ans:- C stands for friction

Ques:- According to Lami’s theorem

Ans:- If trhe three forces acting at a point are in equilibrium, then each force is proportional to the sine of the angle between the other two.

Ques:- The centre of gravity of a quadrantof a circle lies along its central radius at a distance of

Ans:- 0.424 R

 

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