Join Us ::

Menu Home Classes GK Engineering Past Papers Current Affairs Technical GAT Subject Programming Medical Papers

Engineering :: All Aptitude Test ::

Home » Engineering » Aptitude Test - 79
Hassan
1.The normal component of a force inclined through θ° is obtained by multiplying the force by
A. sin θ
B. cos θ
C. sin θ cos θ
D. sin θ
2.Stress may be defined as
A. force per unit length
B. force per unit volume
C. force per unit area
D. force per unit length
3.Total strain energy theory for the failure of a material at elastic limit, is known
A. Guest's or Trecas' theory
B. St. Venant's theory
C. Haig's theory
D. Guest's or Trecas' theory
4.The modulation technique used for mobile communication systems during world war II was
A. Amplitude modulation
B. Frequency modulation
C. ASK
D. Amplitude modulation
5.———– introduced Frequency Modulation for mobile communication systems in 1935.
A. Edwin Armstrong
B. Albert Einstein
C. Galileo Galilei
D. Edwin Armstrong
6. The early FM push-to-talk telephone systems were used in
A. Simplex mode
B. Half duplex mode
C. Full duplex mode
D. Simplex mode
7. In a shaft the shear stress is not directly proportional to
A. Radius of the shaft
B. Angle of twist
C. Length of the shaft
D. Radius of the shaft
8.The greatest load which a spring can carry without getting permanently distorted, is called
A. Stiffness
B. Proof resilience
C. Proof stress
D. Stiffness
9.In plastic analyses the shape factor for rectangular section is
A. 1.4
B. 1.5
C. 1.6
D. 1.4
10.Coefficient of wind resistance of a circular surface is
A. 1 / 2
B. 1 / 3
C. 2 / 3
D. 1 / 2
11. Determination of B.M. of structures by slope deflection method falls in the category of
A. Determinate analysis
B. Matrix analysis
C. Indeterminate analysis
D. Determinate analysis
12. The cases of support sinking are encountered when
A. Soil conditions change at nearby distances
B. Load geography is undulated
C. Both of the above
D. Soil conditions change at nearby distances
13. The ratio between angle of repose and angle of friction is
A. 0.3
B. 1.30
C. 0.9
D. 0.3
14.Heat conducted througfi unit area and unit thick face per unit time when temperature difference between opposite faces is unity,is called
A. thermal resistance
B. temperature gradient
C. thermal conductivity
D. thermal resistance
15. The rate of energy emission from unit surface area through unit solid angle, along a normal to the surface, is known as
A. emissivity
B. reflectivity
C. intensity of radiation
D. emissivity
16.Emissivity of a white polished body in comparison to a black body is
A. higher
B. lower
C. same
D. higher
17. A grey body is one whose absorptivity
A. varies with temperature
B. varies with wavelength of the incident ray
C. is equal to its emissivity
D. varies with temperature
18.Two balls of same material and finish have their diameters in the ratio of 2 : 1 and both are heated to same temperature and allowed to cool by radiation. Rate of cooling by big ball as compared to sm
A. 01:05:00
B. 02:01:00
C. 01:02:00
D. 01:05:00
19.A non-dimensional number generally associated with natural convection heat transfer is
A. Grashoff number
B. Weber number
C. Prandtl number
D. Grashoff number
20.LMTD in case of counter flow heat exchanger as compared-to parallel flow heat exchanger is
A. higher
B. lower
C. same
D. higher
21. In heat exchangers, degree of approach is defined as the difference between temperatures of
A. cold water inlet and outlet
B. hot medium inlet and outlet
C. hot medium outlet and cold water inlet
D. cold water inlet and outlet
22.In counter flow heat exchangers
A. both the fluids at inlet (of heat exchanger where hot fluid enters) are in their coldest state
B. both the fluids at inlet are in their hottest state
C. both the fluids .at exit are in their hottest state
D. both the fluids at inlet (of heat exchanger where hot fluid enters) are in their coldest state
23. A steam pipe is to be insulated by two insulating materials put over each other. For best results
A. better insulation should be put over pipe and better one over it
B. inferior insulation should be put over pipe and better one over it
C. both may be put in any order
D. better insulation should be put over pipe and better one over it
24.Fourier’s law of heat conduction is valid for
A. one dimensional cases only
B. two dimensional cases only
C. three dimensional cases only
D. one dimensional cases only
25.According of Kirchhoff’s law,
A. radiant heat is proportional to fourth power of absolute temperature
B. emissive power and absorptivity are constant for all bodies
C. ratio of emissive power to absorptive power is maximum for perfectly black body
D. radiant heat is proportional to fourth power of absolute temperature
26.All radiations in a black body are
A. reflected
B. refracted
C. transmitted
D. reflected
27.According to Kirchoff’s law, the ratio of emissive power to absorptivity for all bodies is equal to the emissive power of a
A. grey body
B. brilliant white polished body
C. red hot body
D. grey body
28.The concept of overall coefficient of heat transfer is used in case of heat transfer by
A. conduction
B. convection
C. radiation
D. conduction
29.Joule sec is the unit of
A. universal gas constant
B. kinematic viscosity
C. thermal conductivity
D. universal gas constant
30.The value of Prandtl number for air is about
A. 0.15
B. 0.35
C. 0.7
D. 0.15
Related Subjects

Date to Date Current Affairs 2022

PakMCQs.net

Quick Links

GAT Subject



   Computer Science    English Mcqs    Agriculture    

Engineering



   Computer Science    Civil Engineering    

Technical



   Networking    Electronics    Database    

Past Papers



   Model Papers    FPSC Papers    
Our Team | Career | Contact | JoinUs | Privacy Policy | DMC

© 2020-2024 by Pak-MCQs.net All Rights Reserved.

Email: [email protected]