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Latest APGENCO AEE Mechanical Exam Question (Objective Questions), MCQ in English

Subjects : Core Subject (Mechanical), General intelligence & Reasoning, General Awareness, English Language & Comprehension, Quantitative Aptitude, Computer Knowledge

Question Bank APGENCO Assistant Executive Engineer (Mechanical) Exam - English
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Core Subject (Mechanical)

Question 1Single Answer
Which of the following is the unit of kinematic viscosity _________________?
  1. APascal
  2. BPoise
  3. CStoke
  4. DFaraday
  5. ENone of the above
Question 2Single Answer
Consider the following motions :
1. Piston reciprocating inside an engine cylinder
2. Motion of a shaft between foot-step bearings
Which of the above can rightly be considered as successfully constrained motion?
  1. A1 only                     
  2. B2 only
  3. CBoth 1 and 2           
  4. DNeither 1 nor 2
Question 3Single Answer
A rotor weighing 2 kN is supported on bearings A and B which are 1 m apart. The centre of mass of the rotor is at a distance 0.4 m from bearing A. It is observed that there is an unbalanced couple of magnitude 300 N-m which leaves the shaft balanced statically.The dynamic reactions at the supports will be
  1. A800 N and 800 N
  2. B300 N and 800 N
  3. C800 N and – 300 N
  4. D300 N and – 300 N
Question 4Single Answer
A spherical waterdrop of 1 mm in diameter splits up in air into 64 smaller drops of equal size. The surface tension coefficient of water in air is 0.073 N/m. The work required in splitting up the drop is
  1. A0.96 × 10–6 J            
  2. B0.69 × 10–6 J
  3. C0.32 × 10–6 J            
  4. D0.23 × 10–6 J
Question 5Single Answer
Consider the following statements pertaining to stability of floating bodies:
1. A floating body will be stable when the centre of gravity is above the centre of buoyancy.
2. The position of metacentres corresponding to different axes of rotation are generally different for the same floating object.
3. For cargo ships, the metacentric height varies with loading.
Which of the above statements are correct?
  1. A1, 2 and 3                
  2. B1 and 2 only
  3. C1 and 3 only                        
  4. D2 and 3 only
Question 6Single Answer
A fin will be more effective when Bio number is
  1. AGreater than 1
  2. BEqual to 1
  3. CBetween 1 and 3
                   4        4
  4. DLess than 1
Question 7Single Answer
A tank of length, breadth and height in the ratio of 2:1:2 is full of water. The ratio of hydrostatic force at the bottom to that at any larger vertical surface is
  1. A1
  2. B2
  3. C3
  4. D4
Question 8Single Answer
Which of the following fluids exhibit a certain shear stress at zero shear strain rate followed by a straight line relationship between shear stress and shear strain rate?
  1. ANewtonian fluid 
  2. BIdeal Bingham plastic fluids
  3. CPseudo-plastic fluids
  4. DDilatent fluids
Question 9Single Answer
What is the specific gravity of a marble stone, which weighs 400N in air, and 200N in water? (g=10m/s2)
  1. A8
  2. B6
  3. C4
  4. D2
Question 10Single Answer
What is the intensity of pressure in the following SI units, when specific gravity of mercury is 13.6 and the intensity of pressure is 400KPa ?
  1. A0.3 bar or 4.077m of water or 0.29 mm of Hg
  2. B4 bar or 5.077m of water or 0.399 mm of Hg
  3. C0.3 bar or 5.077m of water or 0.599 mm of Hg
  4. D4 bar or 4.077m of water or 0.299 mm of Hg
Question 11Single Answer
Consider the following statements:
1.If a small upward displacement is given to a floating body, it results in the reduction of the buoyant force acting on the body
2.A slight horizontal displacement does not change either the magnitude or the location of the buoyant force 
Which of the above statements is/are correct? 
  1. ABoth 1 and 2
  2. B1 only 
  3. C2 only
  4. DNeither 1 nor 2 
Question 12Single Answer
State whether following flow field is physically possible? 
  1. APossible for steady, incompressible flow
  2. BPossible for unsteady, incompressible flow
  3. CPossible for steady, compressible flow 
  4. DNot Possible 
Question 13Single Answer
In a differential manometer, a head of 0.5 m of fluid A in limb 1 is found to balance a head of 0.3 m of fluid B in limb 2. The atmospheric pressure is 760 mm of mercury. The ratio of specific gravities of A to B is
  1. A0.25
  2. B0.26
  3. C2
  4. D4
Question 14Single Answer
A Reversed Carnot Engine removes 50 kW from a heat sink. The temperature of the heat sink is 250 K and the temperature of the heat reservoir is 300 K. The power required of the engine is
  1. A10 kW 
  2. B20 kW
  3. C30 kW
  4. D50 kW
Question 15Single Answer
On which of the following just in time manufacturing philosophy emphasizes ?
  1. Aman power
  2. Bprofit
  3. Cinventory
  4. Dmanufacturing
Question 16Single Answer
In a stream line steady flow, two points A and B on a stream line are 1m apart and the flow velocity varies uniformly from 2m/s to 5m/s. What is the acceleration of fluid at B?
  1. A3 m/s2
  2. B6 m/s2
  3. C9 m/s2
  4. D15 m/s2
Question 17Single Answer
The stream function is given by Ψ = 3xy, then the velocity at the point (2,3) is
  1. A9
  2. B-6
  3. C117
  4. D10.8
Question 18Single Answer
The boundary layer thickness at a given distance from the leading edge of a flat plate is
  1. AMore for lighter fluid
  2. BMore for denser fluid
  3. CLess for denser fluid
  4. DLess for lighter fluid
Question 19Single Answer
In a laminar flow through a circular pipe, the discharge varies
  1. ALinearly with fluid density
  2. BInversely with pressure drop
  3. CDirectly as square of pipe radius
  4. DInversely with fluid velocity
Question 20Single Answer
A fluid is flowing over a flat plate. At distance of 8 cm from the leading edge, the Reynolds number is found to be 25600. The thickness of the boundary layer at this point is
  1. A1.5mm
  2. B2.5mm
  3. C4.0mm
  4. D5.0mm
Question 21Single Answer
If a submerged body displaced from its equilibrium position, returns to its original position, it is called __________.
  1. Athermal equilibrium
  2. Bneutral equilibrium
  3. Cunstable equilibrium
  4. Dstable equilibrium
Question 22Single Answer
In a flow measurement, a venturi meter is preferred over an orifice plate because _____.
  1. Aenergy of head loss is less
  2. BIt is cheaper
  3. Cpressure drop is more
  4. Dspace is limited  
Question 23Single Answer
Pitot tube measures ______.
  1. Adynamic pressure of a moving stream
  2. Bguage pressure
  3. Ctemperature of moving water
  4. Dpressure difference between two fluids
Question 24Single Answer
Which of the following is not a property of an ideal fluid ?
  1. Aflow is irrotational
  2. Bit has no viscosity
  3. Cit has viscosity
  4. Dit is incompressible
Question 25Single Answer
Nozzle used in steam turbines convert ________.
  1. Aenthalpy of steam into work
  2. Benthalpy of steam into kinetic energy
  3. Centhalpy of steam into pressure energy
  4. Dpressure energy into work
Question 26Single Answer
Which of the following assumptions is the most relevant in air-standard cycle analysis ?
  1. AAll the processes within the cycle are irreversible
  2. BWorking fluid is a fixed mass
  3. CSpecific heat of air changes during the cycle
  4. DCycle is assumed to be an open cycle
Question 27Single Answer
The modern Francis turbine is a ___________flow turbine .
  1. Atangential 
  2. Baxial
  3. Cradial
  4. Dmixed
Question 28Single Answer
Variation of stress with strain rate for a Newtonian fluid is ______ .
  1. Ahyperbolic
  2. Blinear
  3. Celliptical
  4. Dparabolic
Question 29Single Answer
Which of the following is NOT a part of refrigeration systems ?
  1. ATurbine
  2. BEvaporator
  3. CCompressor
  4. DCondenser
Question 30Single Answer
Which of the following is NOT an intensive property ?
  1. ATemperature
  2. BTotal volume
  3. CPressure
  4. DDensity
Question 31Single Answer
Which of the following does NOT represent a unit of viscosity ?
  1. AStoke
  2. BPoise
  3. Cm²/sec
  4. DN-m/sec
Question 32Single Answer
__________ in the fuel is oxidised during knocking .
  1. AHydrocarbon
  2. BPhosphorous
  3. CWater
  4. DCoal
Question 33Single Answer
_________ is defined as the ability of a material to resist deformation under action of an external load .
  1. AStiffness
  2. BResilience
  3. CBrittleness
  4. DToughness
Question 34Single Answer
Draught is produced in locomotive boilers by which of the following components ?
  1. ALocomotive
  2. BSteam jet
  3. CCentrifugal fan
  4. DChimney
Question 35Single Answer
For a steady flow, the value of all fluid properties at any fixed point _________ .
  1. Ado not change with location
  2. Bchange with time
  3. Cchange with location
  4. Ddo not change with time
Question 36Single Answer
For a floating body, if the metacentre is below the centre of gravity, then the body is said to be __________ equilibrium .
  1. Athermal 
  2. Bstable 
  3. Cunstable
  4. Dneutral
Question 37Single Answer
________ is useful for measuring flow of a conducting fluid .
  1. AOrifice meter
  2. BRotameter
  3. CVane meter
  4. DElectro-magnetic flow meter
Question 38Single Answer
A two- stroke engine consists of ________ port (s)
  1. AThree
  2. BFour
  3. COne
  4. DTwo
Question 39Single Answer
Air Cooling is mostly preferred for _________ .
  1. Aheavy truck
  2. Bbuses
  3. Cmoto cycles
  4. Dmulti-utility vehicles
Question 40Single Answer
_______ valves are provided in reciprocating compressors .
  1. ASimply supported
  2. BSolenoid
  3. CPlate
  4. DPoppet
Question 41Single Answer
Benson boiler have ______ water drum (s)
  1. AOne
  2. BZero
  3. CThree
  4. DTwo
Question 42Single Answer
_________ is used for pumping water into a boilers .
  1. AEconomiser
  2. BDuplex pump
  3. CFeed pump
  4. DRotor
Question 43Single Answer
The function of a carburetor in internal combustion engines is :
  1. Ato control fuel alone
  2. Bto cool exhaust gases
  3. Cto maintain air-fuel ratio
  4. Dto control air alone
Question 44Single Answer
The device which transfers energy from the ______ to _____ the is known as hydraulic turbine .
  1. Aatmosphere; fluid  
  2. B  rotor; fluid
  3. Cfluid; rotor
  4. Dfluid; atmosphere
Question 45Single Answer
The flash chamber in the single stage VCR cycle serves to ________ .
  1. Adecrease the compression ratio
  2. Bincrease the refrigerating effect
  3. Cincrease the compression ratio
  4. Ddecrease the refrigerating effect
Question 46Single Answer
Define thermodynamics .
  1. AIt is a science which deals with the relation between heat, work and properties of systems
  2. BIt is a science which deals with work done
  3. CIt deals with dynamics under thermal conditions
  4. DIt is science which deals with the relation between work and properties
Question 47Single Answer
Which of the following statements is correct about a Benson boiler ?
  1. AAir is sent through the same direction
  2. BThere is no recirculation of water
  3. CSteam is sent out in multiple directions
  4. DFlue gases pass only in one direction
Question 48Single Answer
Within a refrigeration system, the expansion valve is incorporated between the ________ .
  1. ASuper-heater and sub-cooler 
  2. Bcompressor and condenser
  3. Cevaporator and compressor
  4. Dcondenser and evaporator
Question 49Single Answer
The reversed ______ cycle employed for passenger aircraft systems . 
  1. ACarnot     
  2. BAtkinson
  3. CEricsson
  4. DBrayton
Question 50Single Answer
Fusible plug in a steam boiler is placed ______ .
  1. Abelow the water level indicator
  2. Bat he crown of the furnace
  3. Cat the fire grate of the boiler
  4. Dnear the manhole
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