RRB JE ME (CBT II) Mock Test- 1
150 Questions MCQ Test RRB JE Mock Test Series for Mechanical Engineering (ME) | RRB JE ME (CBT II) Mock Test- 1
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The effective resistance between points P and Q of the electrical circuit shown in the figure is
The circuit is symmetrical about axis POQ. Therefore the equivalent circuit is drawn.
If a refrigerant is undergoing expansion, which of the following remains constant?
Power screws are designed in how many types of arrangements?
From the following, where should work study be used?
What is the benefit that one can get from industrial engineering?
By how many ways can heat be transferred from one object to another?
Which one of the following is an example of an output computer device?
e.g., mouse and a keyboard
Output devices - An output device can receive data from another device and generate output with that data, but it cannot send data to another device.
e.g., monitor and a printer
Which force acts on a liquid to give rise to surface tension?
Calculate the moment of force at point R, if The force at point P is 1500N and acting downwards, the distance RP is 4M, and the angle between them is 30˚.
If a four stroke engine with a single cylinder is rotating at 2000 RPM, how many power strokes does it completely in 1 minute?
In a multi cylinder engine, what does firing order mean?
Who of the following is not a full -time member of NITI Ayog?
Full-time Members: Bibek Debroy (Economist), V. K. Saraswat (former DRDO Chief), Ramesh Chand (Agriculture Expert) and Dr. Vinod Paul (Public Health expert)
According to Newton's law of motion, is it possible to swim?
Newton's third law states that every action must have an equal and opposite reaction.
In swimming, when the hands and feet push against the water, the water pushes back on the swimmer and propels the swimmer forwards.
__________ is used as a programming language in first generation computers?
Which weed is widely used to reduce water pollution caused by industries effluents?
If the spring index is 4 , the Wahl’s factor would be?
Wahl's Correction factor is given by
Where, C= Spring index.
On the traditional lathe machine, lead screws are _______ type of screw.
Who among the following considered the "Right to Constitutional Remedies' ' to be the heart and soul of the Indian Constitution?
Which of the following is the ultimate source of energy for human beings?
The time in which a transformer is used in welding in normal load conditions?
For a fluid to be in equilibrium, which condition is satisfied?
Which Indian private sector bank has the maximum number of foreign branches ?
SBI leads the list of public sector banks, followed closely by Bank of Baroda.
Which of the following is NOT a rich source of Calcium?
In a polishing operation, from the following which grit size will have better surface finish?
A rectangular shaped fin is cut longitudinally, the result will be?
To form a couple the two forces should be separated by a distance of?
An example of an abiotic component of the environment is __________________.
Among the following Greenhouse effects in the atmosphere?
Calculate machining time in min, if length of the tool travel is 15mm, feed per revolution of drill is 6mm and RPM is 2.
we use the formula as
T=1.25 min
If a component needs rough machining, which grinding wheel must be used?
Which state’s government observed the martyrdom day of Bhagat Singh, Sukhdev and Rajguru as 'Youth Empowerment Day?
Which of the following is not true regarding the exchange rate of the Indian Rupee?
Which wetland of India is recently enlisted in the conservatory list of Ramsar?
The number of instantaneous centers when there are 5 links will be?
The number of instantaneous centers when there are 5 links will be 10.
Gears of the same size and connecting two shafts at right angle to each other is
When a solid is subjected to pure torsional moment, the torsional shear stress is given by
When a solid is subjected to pure torsional moment, the torsional shear stress is given by 
where d= shaft diameter.
The standard symbol for storage in operation research is
M/s tire tubes limited manufactures tire tubes for 2 wheelers. The Annual demand for the tire costing Rs. 200 per piece is 15000. The ordering cost is Rs. 100 and the cost for holding the inventory is Rs. 3.5 per unit per year. The E.O.Q will be;
When the projectile angle is 45o , the range of the projectile is;
The coefficient of restitution for elastic bodies is;
Coefficient of restitution for perfectly elastic bodies is 1
The principle of transmissibility of force states;
In coplanar non-concurrent non-parallel force system,
A technique in which total variable and fixed costs are compared with sales revenue in order to determine the level of sales volume or production at which the business makes no profit or loss is;
In an Iron-carbon diagram, the percentage of carbon present in hyper eutectoid steels is;
While quenching austenite below 725 degree celsius, if there is no change in the microstructure of it this period is called
In the welding process,consumable electrodes are used in
In the shielded metal arc welding, the temperature between the core of the arc ranges between
Angle of a machined surface can be measured indirectly by using;
If the maximum size of the hole is smaller than the minimum size of the shaft, such fits are called
In metrology, the surface finish can be measured by
To make the dynamometer more effective, how many active gauges will be used in a strain gauge dynamometer?
Choose the correct option which indicates the objective of the Morse test.
The standard firing order in a four-cylinder petrol engine is
The firing order is the sequence of power delivery of each cylinder in a multi-cylinder reciprocating engine.
In India, the octane number of the fuel used commercially for diesel engine
A refrigerator working on a reversed carnot cycle has a COP of 3. If the machine works as a heat pump,then find out its COP.
Calculate the power require for the machine in removing the heat at the rate of 1700 KJ/min.(COPR) = 3
R.E=1700 KJ/min
= 28.33KW
w=R.E/COP
= 28.33KW/3= Power
Power= 9.44KW
Find the refrigeration effect in a vapour compression refrigeration plant when the refrigeration leaves the evaporator and the condenser at 205 KJ/kg and 85 KJ/kg. Consider the mass flow rate as 1.5kg/sec.
R.E=1.5 x (205-85)
= 180KW
A carnot refrigerator has a COP of 5. What is the ratio of the lower to the higher absolute temperatures?
What among the following boiler mounting is used to protect the boiler against the damage due to overheating for low water level?
In a close system, heat transfer at constant volume
Which among the following is the dimensionless quantity?
Removing the metal by using the high velocity stream of abrasive particles carried by high pressure gas through a nozzle on the workpiece is;
Choose the option which is not true for the properties of cutting fluid used in metal cutting
Following is the data available on cutting speed and tool life
V=160m/min, T=50min
V=200m/min, T=30min
Determine the taylor constant and tool life exponent.
Choose the correct sequence of tool signature according to American standards Association(ASA)
Back rake angle- side rake angle - end relief relief angle-side relief angle- end cutting edge angle-side cutting edge angle - Nose radius
Choose the option which is not true for Taper allowance in casting
Taper allowance/draft allowance is used to provide easy removal of the pattern without damaging mould. The average value of the taper allowance is 
. The internal surface requires more taper when compared to the A largeexternal surface because for the external surface mould surface is more compared to internal surface.
Which one of the following is a part of moulding a flask in sand casting?
Choose the option from the following which shows a correct pair of higher pairs.
Choose the option(s) about the force(s) on which transmission shafts are subjected to;
Friction clutches can be used to the material that have;
A man is climbing up a ladder which is resting against a vertical wall. When he was exactly half way up, the ladder started slipping. The path traced by the man is :
P is the midpoint of the lagger.
BP = AP = L/2, OC = CB = x
When x = 0, then y = L/2
(Point P lie on OA)
When y = 0, then x = L/2
This condition satisfies the circle equation,
(x)2 + (y)2 = (L/2)2
So, the path traced by point is circular.
A ball is thrown upwards and it returns to the ground describing a parabolic path. Which of the following remains constant?
Vertically, it has constant acceleration due to gravity.
Horizontally, it has constant velocity
Which one of the following mechanisms represents an inversion of the single slider crank chain?
(i) Engine/compressor
(ii) Whitworth Quick Return Mech/ Rotary cylinder engine
(iii) Slotted lever type/oscillating cylinder type
(iv) Hand pump mechanism
Which mechanism produces intermittent rotary motion from continuous rotary motion?
In circular arc cam with a flat faced reciprocating follower, the contact between the follower and the nose of the cam is only maintained if :
A gear of 28 cm pitch circle diameter has 40 teeth.
The circular pitch will nearly be
Pc = ?D/T = ? x 280/40
= 7? = 21.99 mm/tooth
= 22 mm/tooth
The device used to measure the fluid pressure is _____________
The flywheel of a machine having the weight of 4500 N and a radius of gyration of 2 m has a cyclic fluctuation of speed from 125 r.p.m. to 120 r.p.m. Assuming g = 10 m/s², the maximum fluctuation of energy is
While calculating the natural frequency of a spring-mass system, the effect of the mass of the spring is accounted for by adding X times its value of the mass, where X is
So, x = 1/3
A governor is said to be isochronous when the equilibrium speed is
What type of liquids are measured using a manometer?
A fillet weld is loaded parallel to its length l by a load P. If the weld leg is h, the average shear stress on the throat area is
A solid shaft is designed to transmit 100 kW while rotating at N r.p.m. If the diameter of the shaft is doubled and is allowed to operate at 2 N r.p.m., the power that can be transmitted by the latter shaft is
Pmax = 
The bearing modulus for a bearing is 1628. What is the bearing characteristic number considered for bearing design?
Bearing characteristic number
= 3 × (bearing modulus)
= 4884
The effect of increasing the stiffness of springs of centrifugal clutch is
Which one of the following is not a statically indeterminate structure?
If a piece of material neither expands or contracts in volume when subjected to stress, then the Poisson’s ratio must be
A simply supported beam is subjected to a distributed as shown in the diagram given below :
The maximum shear force in the beam is
For a rectangular section beam, if the beam depth is doubled, keeping the width, length and loading same, the bending stress is decreased by a factor
Slenderness ratio of a column is defined as the ratio of its length to its
Since buckling of column under the crippling load will take place about the axis of least resistance (i.e. about the axis about which moment of inertia is least)
Hence slenderness ratio = length/least radius of gyration
Edge and screw dislocation are line imperfections.
Very small quantity of carbon in iron as in steels forms interstitial solid solution mainly because atomic size(s) of
Materials which show direction dependent properties are called
Homogenous material is one if it has the same composition throughout the body.
Isotropic material is one in which properties are independent of direction.
Viscoelastic material has a time dependent stress-strain curve.
The process of making hollow castings of non circular shape and desired thickness by permanent mould without the use of cores is known as
The methods of casting for producing ornamental pieces are
Application : Jewellery, Ornamental objects, statues.
Which among these devices are the best suited for the measurement of high pressure liquids with high accuracy?
In the forging process :
1. The metal structure is refined
2. Original unidirectional fibers are distorted
3. Poor reliability, as flaws are always there due to intense working
4. Part is shaped by plastic deformation of the material
Due to intense hammering, flaws are minimized.
Extrusion process can effectively reduce the cost of product through
Which of the following are correct for an indirect hot extrusion process?
1. Billet remains stationary
2. There is no friction force between billet and container walls
3. The force required on the punch is more in comparison to direct extrusion
4. Extruded parts have to be provided a support
1. 25-30% reduction in maximum load relative to direct extrusion.
2. Extrusion pressure is not a function of billet length.
3. No friction between billet and container.
4. Tool has a higher service life.
What is the instrument used for the automatic control scheme during the fluid flow?
If the fluid is at rest in a container of a narrow mouth at a certain column height and the same fluid is at rest at the same column height in a container having a broad mouth, will the pressure be different at a certain depth from the fluid surface.
Which one of the following statements is correct about an oblique cutting?
A milling cutter having 8 teeth is rotating at 150 r.p.m. If the feed per tooth is 0.1 mm, the table speed in mm per minute is
Pressure intensity or force due to pressure gradient for fluid at rest is considered as which kind of force?
Which one of the following properties of work materials is responsible for the material removal rate in electrochemical machining?
Calculate the hydrostatic pressure for water moving with constant velocity at a depth of 5 m from the surface.
p= ρgh.
In the inverted U-tube Differential manometer, how is the specific gravity of manometric fluid used relative to the fluid flowing in the pipes
An unbounded solution of linear programming problem is reflected in the simplex method, when
In PERT, the distribution of activities times is assumed to be
Why is a large reservoir used in a single column manometer?
The distance moved by liquid will be more in which type of manometer?
Which device is popularly used for measuring the difference of low pressure?
Pressure variation for compressible fluid is maximum for which kind of process?
Why can’t the density be assumed as constant for compressible fluids?
The gas in a cooling chamber of a closed-cycle gas turbine is cooled at
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