APTITUDE TEST-2
PART 1
1. Critical temperature of water is
a) 274.15K
b) 274.15˚C
c) 374.15K
d) 374.15˚C
2. Which of the following is not the intensive property
a) Pressure
b) Temperature
c) Heat
d) Density
e) Specific volume
3. An actual engine is to be designed having same efficiency as the Carnot
cycle. Such a proposition is
a) Feasible
b) Impossible
c) Possible
d) Possible, but with lot of sophistications
e) Desirable
4. Carnot cycle efficiency is maximum when
a) Initial temperature is 0K
b) Final temperature is 0K
c) Difference between initial and final temperature is 0K
d) Final temperature is 0˚C
e) Initial temperature is minimum possible
5. Work done is zero for the following process
a) Constant volume
b) Free expansion
c) Throttling
d) All of the above
e) None of the above
6. Which is false statement about enthalpy
a) It is the function of specific heat at constant volume
b) Enthalpy is the sum of internal energy and pressure volume product
c) It is the same as heat transfer during constant pressure process
d) It is the function of specific heat at constant pressure
e) It is the extensive property of the system
7. One kg of steam sample contains 0.8 kg dry steam; it’s dryness fraction is
a) 0.2
b) 0.8
c) 0.6
d) 1.0
e) 0.5
8. A vessel contains carbon dioxide of pressure 500kPa and nitrogen of
pressure 600kPa. Then pressure in the vessel is
a) 100kPa
b) 1100kPa
c) 550kPa
d) 50kPa
9. In an isothermal process, the internal energy
a) Increases
b) Decreases
c) Remains constant
d) First increases and then decreases
e) First decreases and then increases
10.An engine operates between temperatures of 900˚C and T2 and another
engine between T2 and 400˚C. For both to do equal work, value of T2
will be
a) 650˚C
b) 600˚C
c) 625˚C
d) 700˚C
e) 750˚C
11.A 75cc engine has following parameter as 75cc
a) Fuel tank capacity
b) Lub oil capacity
c) Swept volume
d) Cylinder volume
e) Clearance volume
12.Velocity of an airplane is 270kmph. If the temperature of the air is zero,
then the flow is
a) Sonic
b) Supersonic
c) Subsonic
d) Cannot be determined
13.For which process the work supplied per kg of air can be less in air
compressors
a) Polytrophic process
b) Adiabatic process
c) Isothermal process
d) Isobaric process
14.At what temperature volume of all perfect gases will be zero
a) 273K
b) -273˚C
c) 273˚C
d) 100˚C
15.Calorie is a measure of
a) Specific heat
b) Quantity of heat
c) Thermal capacity
d) Entropy
e) Work
16.Heat supplied to an engine is 30000J/s and the output is 90kW. What is
the thermal efficiency?
a) 30%
b) 33%
c) 60%
d) 50%
e) None of the above
17.When water, oil and mercury in a vessel are rotated, in which order
liquids occupied from the wall?
a) Oil, water, mercury
b) Mercury, water, oil
c) Oil, mercury, water
d) Water, oil, mercury
18.What is the stability condition for a floating body
a) Centre of Gravity is above meta centre
b) Centre of Gravity is below meta centre
c) Centre of gravity is left to meta centre
d) Centre of gravity is right to meta centre
19.At which temperature both Celsius and Fahrenheit are equal
a) 40˚C
b) -40˚C
c) -100˚C
d) 100˚C
20.In a Carnot cycle, heat is transferred at
a) Constant pressure
b) Constant volume
c) Constant temperature
d) Constant enthalpy
e) Any of the above
21.Reciprocating air compressor is best suited for
a) Large quantity of air at high pressure
b) Small quantity of air at high pressure
c) Large quantity of air at low pressure
d) Small quantity of air at low pressure
22.Angle of contact for water is
a) 128˚
b) 157˚
c) 130˚
d) 0˚
23.If w is the specific weight of liquid and h the depth of any point from the
surface, then pressure intensity at that point will be
a) H
b) wh
c) w/h
d) h/w
e) 1/wh
24.Rain drops are spherical because of
a) Viscosity
b) Air resistant
c) Surface tension
d) Atmospheric pressure
e) Cohesion
25.Viscosity of water at 20 is
a) 0.01poise
b) 0.1poise
c) 1poise
d) 10poise
26.A piece weighing 3kg in air was found to weigh 2.5kg when submerged
in water. Its specific gravity is
a) 1
b) 5
c) 6
d) 7
e) 2
27.Rotameter is a device used to measure
a) Absolute pressure
b) Velocity of fluid
c) Flow
d) Rotation
e) Velocity of air
28.The average value of coefficient of velocity is of the order of
a) 0.56
b) 0.68
c) 0.78
d) 0.89
e) 0.97
29.Froude number is the square root of the ratio of inertial force to
a) Gravitation force
b) Surface tension
c) Elasticity
d) Viscosity
e) None of these
30.The value of coefficient of discharge in comparison to coefficient of
velocity is
a) More
b) Less
c) Same
d) More/less depending on flow
e) unpredictable
PART 2
1. The ratio of longitudinal stress to shear stress in thin walled cylinders is
a) 1 b) 0.5 c) 2 d) 0.25 e) 4
2. The deformation of any structure takes place in such manner that the
work of deformation is minimum. This is according to
a) castigliano’s theorem b) principle of least work c) Maxwell’s theorem
d) theory of flexure e)moment shear relation
3. Point of contraflexure occurs in
a) simply supported b)beams with UVL c)cantilevers
d) overhanging beams e) any type of beam
4. In case of cantilever, irrespective of loading, maximum B.M and maximum
S.F occurs at
a) free end b) under the load c)fixed end d)middle e)any point
5. If a material expands freely due to heating it will develop
a) thermal stress b) tensile stress c) compressive stress
d) bending e) no stress
6. A hollow shaft of same C.S as that of the solid shaft can resist
a) less torque b) more torque c) same torque d) none
7. Which one of the following materials is highly elastic?
a) rubber b) brass c) steel d) glass
8. In the assembly of pulley, key, shaft
a) pulley is made the weakest b) key is made the weakest
c) key is made the strongest d) all the three are designed for equal strength
9. The number of independent of elastic constants required to express the stress
strain relationship for a linearly isotropic material is
a) 1 b)2 c)3 d) 4
10.The deformation of bar under its own weight as compared to that subjected
to a direct axial load equal to its own weight will be
a) same b)0.25 times c) 0.5 times d) twice
11.Which will improve the fatigue strength of the material?
a) increasing the temperature
b) scratching the surface
c) overstressing
d) under stressing
12. When a strip made of iron and copper is heated
a) does not bend b) gets twisted c) bends with iron on concave side
d) bends with iron on convex side e) none
13.Nature of stress- strain curve for glass rod subjected to tensile test is
a) straight and drooping b) sudden break c) straight line
d) parabolic e) none
14.Maximum shear stress in Mohr’s circle is equal to
a) radius of Mohr’s circle b) greater than the radius of circle
c) less than the radius of the circle d) none
15.A long column fails by
a) crushing b) tension c) shearing d) buckling e) both a& d
16.For which material poisson’s ratio is more than unity
a) steel b) copper c) aluminium d) cast iron e) none
17.Loss of strength in compression due to overloading is known as a)
hysteresis b)relaxation c) creep d) bauschinger effect e) resilience
18.Pressure vessels are not made of rectangular shape, because
a) difficult to fabricate b) not economical
c) not gives pleasing appearance d) none of above
19.The shear force diagram for a cantilever beam carrying UDL over its length
is
a)triangle b) rectangle c) hyperbola d) parabola
20.Radius of a curvature of a stressed beam & modulus of elasticity
a) are directly proportional b) inversely proportional
c) are curvilinearly related d) unpredictable relationship
21.Ratio of inertia force to elastic force is known as
a) mach number b) Froude number c) Reynolds’s number
number
d) Weber’s
22.Pitot tube is used to measure
a) pressure b) flow c) velocity
d) viscosity
23.Ratio of inertia force to surface tension is known as
a) mach number b) Froude number c) Reynolds’s number
d) Weber’s number
24.Metacentric height is the distance between
a) c.g of the body and meta centre b) c.g of the body and centre of
buoyancy c) c.g of the body and centre of pressure d)none
25.Cavitation is caused by
a) high velocity b) high pressure c) weak material d) low pressure
26.A liquid jet from a nozzle exposed to atmosphere traverses along
a)straight line b) circular path c) elliptical path d)parabolic path
e) hyperbolic path
27.A bucket of water is hanging from a spring balance. An iron piece is
suspended into water without touching sides of bucket from another support.
The spring balance reading will
a) increase b) decrease c) remain same d) unpredictable
28.Darcy Weisberg’s formula……………………..