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RRB JE 2019: MINI MOCK QUIZ 3
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Question 1
What does the curve AB represent in the following Psychrometric Chart?
Question 2
The simultaneous processing of two or more programs by multiple processors is ……………
Question 3
If thermal conductivity of a material of wall varies as K_0 (1 + t), then the temperature at the centre of the wall as compared to that in case of constant thermal conductivity, will be __________.
Question 4
We can enter and edit the text efficiently using
Question 5
Rockwell hardness test uses______.
Question 6
The forces which meet at one point and have their lines of action in different planes are called ______________.
Question 7
A refrigerator based on reversed Carnot cycle works between two such temperatures that the ratio between the low and high temperature is 0.8. If a heat pump is operated between same temperature range, then what would be its COP?
Question 8
If u = 4x and v = 1 + 2y then the equation of stream line is
Question 9
The instrument used for finding out wind direction is:
Question 10
In Vickers hardness test method, the shape of indenter is
Question 11
A heat pump works on a reversed Carnot cycle. The temperature in the condenser coils is 27oC and that in the evaporator coils is -23oC. For a work input of 1 kW, how much is the heat pumped?
Question 12
Personal computers are connected to form __________
Question 13
In order to double the time period of a simple pendulum __________.
Question 14
Thunderstorms originate in which type of clouds?
Question 15
Which throne was built by Shah Jahan?
Question 16
Why does a piece of cloth, which appears green in sunlight, appear black when it is viewed under red light?
Question 17
Consider a simple gas turbine (Brayton) cycle and a gas turbine cycle with perfect regeneration. In both the cycles, the pressure ratio is 6 and the ratio of the specific heats of the working medium is 1.4. The ratio of minimum to maximum temperatures is 0.3 (with temperatures expressed in K) in the regenerative cycle. The ratio of the thermal efficiency of the simple cycle to that of the regenerative cycle is ____ .
Question 18
The anthropogenic sources of air pollution in well planned city is
Question 19
The specific power output of a gas turbine is 336.5 kW/Kg and the exhaust gases leave the turbine at 700 K. If the value of CP and CV are 1 kJ/kg-K and 0.717 kJ/kg-K respectively, the turbine pressure ratio is
Question 20
A metal cube of size 20 cm ×20 cm ×20cm and specific gravity of 8.5 is submerged in a two layered liquid, the bottom layer being mercury and upper layer being water. The % of the volume of the cube remaining above the interface will be, approximately
Question 21
In oxyacetylene welding, a stronger oxidizing flame is used mainly for
Question 22
Which of the following is the correct expression for torsional flexibility? (l is length, C is shear modulus and IP is polar moment of inertia of shaft)
Question 23
Focal length of a plane mirror is-
Question 24
If the amplitude ratio of two sources producing interference is 3:5, the ratio of intensities at maxima and minima is
Question 25
Torsional section modulus of a solid circular shaft of diameter d is proportional to
Question 26
A body is immersed in a fluid having an angle θ with the liquid surface. The depth of centre of pressure on the body
Question 27
Which of the following theorem is used for the equilibrium of the body applied with three concurrent coplanar forces
Question 28
The sum of kinetic and potential energy of a falling body __________.
Question 29
A reversible process _________.
Question 30
Clive reconquered Calcutta in the beginning of 1757 and compelled the nawab to concede all the demands of the English. Which of the following treaties was concluded by Siraj-ud-daula with the English on this occasion?
Question 31
A device which increases intensity of pressure by means of hydraulic energy available from large amount of water at low pressure is ________.
Question 32
The weights of 2 W and W are connected by an inextensible string and rest on two inclined planes, inclined at 30 and 60 respectively as shown in the figure below. Angle ‘’ will be equal to
Question 33
Ignition advance in a petrol engine occurs at:
Question 34
There is a thermal insulation of thermal conductivity 0.67 W/m-K applied to a hollow spherical container. The convective heat transfer coefficient at the outer surface of insulation is 20 W/m2K. The critical radius of insulation will be __________.
Question 35
Blade erosion in steam turbines takes place
Question 36
The total coliform bacteria are reported as most probable number (MPN) per
Question 37
A barometer is used to measure
Question 38
If the value of Poisson’s ratio is zero, then it means that __________.
Question 39
Shear force at any point on the beam is the algebraic sum of
Question 40
The cut-off ratio of a diesel cycle is 2. For equal air-standard efficiencies of Otto and Diesel cycle, the ratio of compression ratio of diesel cycle to that of Otto cycle would be
Question 41
The average concentration of ozone present in the stratosphere is approximately
Question 42
A thin-walled cylinder with closed ends for which inner radius is 0.50 meter and outer radius is 0.52 meter, is subjected to internal pressure 2 MPa. The absolute maximum shearing stress on the inner surface of the cylinder shall be ____________.
Question 43
The buoyancy depend on
Question 44
Which of the following is the unit of energy?
Question 45
Which of the following welding technique requires vacuum for its application?
Question 46
200 kg of apples are supplied to a cold storage at 22oC. The cold storage is maintained at -5oC and the apples get cooled to the storage temperature in 8 hours. The latent heat of freezing is 105 KJ/Kg and specific heat of apple is 1.25 KJ/KgK. The refrigeration capacity of the plant is
Question 47
In 1857, how much European were in the Bengal Army?
Question 48
The atomic packing factor is the highest in which of the following cubic lattice system?
Question 49
Match the following.
Sector
1) Primary
2) Secondary
3) Tertiary
Example
a) Consultancy
b) Apiculture
c) Shoe Factory
Sector
1) Primary
2) Secondary
3) Tertiary
Example
a) Consultancy
b) Apiculture
c) Shoe Factory
Question 50
The minimum ratio of diameter to thickness above which spherical shell is called thin spherical cell is
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ESE & GATE MEGeneralAug 10ESE & GATE ME