851. Coriolis component of acceleration exists whenever a point moves along a path that has________________?
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A. linear displacement

B. rotational motion

C. none of the above

D. centripetal acceleration

E. tangential acceleration

852. The basis for measuring thermodynamic property of temperature is given by___________________?
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A. second law of thermodynamics

B. Avogadros hypothesis

C. first law of thermodynamics

D. third law of thermodynamics

E. zeroth law of thermodynamics
853. A circle passing through the pitch point with its center at the center of cam axis is known as___________________?
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A. pitch circle

B. outer circle

C. prime circle

D. cam circle

E. base circle

854. The index of compression n tends to reach ratio of specific heats y when____________________?
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A. process is isentropic and specific heat does not change with temperature

B. process is isothermal

C. process is isentropic

D. process is isentropic and specific heat changes with temperature

E. flow is uniform and steady

855. Total heat of a substance is also known as __________________?
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A. thermal capacity

B. thermal conductance

C. enthalpy

D. entropy

E. internal energy

856. Isochoric process is one in which___________________?
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A. very little mechanical work is done by the system

B. mass and energy transfer do not take place

C. all parameters remain constant

D. free expansion takes place

E. no mechanical work is done by the system
857. In order that a cycle be reversible, following must be satisfied ________________?
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A. none of the above

B. when beat is being rejected, temperature of cold source and working sub-stance should be same

C. all of the above

D. when heat is being absorbed, temperature of hot source and working substance should be same

E. free expansion or friction resisted expansion/compression process should not be encountered

858. Endurance limit or fatigue limit is the maximum stress that a member can withstand for an infinite number of load applications without failure when subjected to________________?
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A. all of the above

B. static loading

C. completely reversed loading

D. combined static and dynamic loading

E. dynamic loading

859. According to first law of thermodynamics_______________________?
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A. heat flows from hot substance to cold substance

B. heat and work are mutually convertible

C. mass and light are mutually convertible

D. mass and energy are mutually convertible

E. Carnot engine is most efficient

860. The specific heat of air increases with increase in __________________?
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A. temperature

B. pressure

C. both pressure and temperature

D. variation of its constituents

E. air flow

861. An ideal gas as compared to a real gas at very high pressure occupies_________________?
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A. more volume

B. less volume

C. unpredictable behaviour

D. same volume

E. no such correlation

862. According to Avogadros law, for a given pressure and temperature, each molecule of a gas_________________?
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A. occupies volume inversely proportional to its specific weight

B. occupies volume proportional to its molecular weight

C. occupies volume proportional to its specific weight

D. occupies same volume

E. occupies volume inversely proportional to its molecular weight

863. A closed system is one in which_________________________?
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A. mass does not cross boundaries of the system, though energy may do so

B. mass crosses the boundary but not the energy

C. neither mass nor energy crosses the boundaries of the system

D. both energy and mass cross the boundaries of the system

E. thermodynamic reactions take place

864. The ideal efficiency of a Brayton cycle with regeneration, with increase in pressure ratio will______________?
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A. increase/decrease depending on ap-plication

B. increase

C. decrease

D. remain unchanged

E. unpredictable

865. If the radius of gyration of a compound pendulum about an axis through e.g. is more, then its frequency of oscillation will be_______________?
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A. less

B. more

C. none of the above

D. data are insufficient to determine same

E. same

866. A cam with a roller follower would con stitute following type of pair______________?
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A. close pair

B. open pair

C. cam pair

D. lower pair

E. higher pair
867. The efficiency of Diesei cycle with decrease in cut off_________________?
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A. decreases

B. first increases and then decreases

C. first decreases and then increases

D. increases

E. remains unaffected

868. Temperature of a gas is produced due to________________?
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A. kinetic energy of molecules

B. surface tension of molecules

C. repulsion of molecules

D. its heating value

E. attraction of molecules

869. The following is the inversion of slider crank chain mechanism______________________?
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A. oscillating cylinder engine

B. none of the above

C. Whitworth quick return mechanism

D. hand pump

E. all of the above
870. Peaucellier mechanism has__________________?
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A. twelve links

B. five links

C. four links

D. eight links

E. six links

871. In a non-flow reversible process for which p = (- 3V+ 15) x 105N/m2,V changes from 1 m to 2 m3. The work done will be about_______________?
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A. 10 xlO5 joules

B. 100 xlOO5 joules

C. 10xl04kiojoules

D. 10 xlO5 kilo joules

E. lxlO5 joules

872. Carnot cycle efficiency depends upon________________?
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A. properties of the medium/substance used

B. condition of engine

C. working condition

D. effectiveness of insulating material around the engine

E. temperature range of operation
873. If a gas vapour is allowed to expand through a very minute aperture, then such a process is known as__________________?
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A. hyperbolic expansion

B. free expansion

C. parabolic expansion

D. throttling

E. adiabatic expansion

874. Which of the following can be regarded as gas so that gas laws could be applicable, within the commonly encountered temperature limits ?
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A. 02, N2, steam, C02

B. steam vapours, H2, C02

C. 02, N2, H2, air

D. S02, NH3, C02, moisture

E. Oz, N2, water vapour

875. Open pairs are those which have__________________?
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A. none of the above

B. two elements that permit relative motion

C. elements of pairs not held together mechanically

D. surface contact between the two ele-ments when in motion

E. point or line contact between the two elements when in motion

876. Which one of the following statements is not correct_________________?
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A. the angle of repose is equal to angle of friction

B. the tangent of the angle of friction is equal to coefficient of friction

C. none of the above

D. the sine of the angle of repose is equal to coefficient to friction

E. the tangent of the angle of repose is equal to coefficient of friction

877. A manufacturer claims to have a heat engine capable of developing 20 h.p. by receiving heat input of 400 kcal/mt and working between the temperature limits of 227 C and 27 C. His claim is__________________?
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A. cost will be very high

B. theroretically possible

C. not possible

D. justified

E. may be possible with lot of sophistications

878. The condition of perfect vacuum, i.e., absolute zero pressure can be attained at ____________________?
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A. a temperature of 273.16C

B. a temperature of 273 K

C. cant be attained

D. a temperature of 0C

E. a negative pressure and 0C temperature

879. First law of thermodynamics furnishes the relationship between______________________?
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A. heat and internal energy

B. heat, work and properties of the system

C. heat and work

D. various properties of the system

E. various thermodynamic processes

880. The efficiency of a Carnot engine depends on_______________________?
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A. working substance

B. size of engine

C. design of engine

D. temperatures of source and sink

E. type of fuel fired

881. Boyles law i.e. pV = constant is applicable to gases under ___________________?
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A. only small range of pressures

B. all ranges of pressures

C. high range of pressures

D. atmospheric conditions

E. steady change of pressures

882. According to Clausis statement of second law of thermodynamics___________________?
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A. heat can be transferred from low temperature to high temperature source if COP of process is more than unity

B. heat cant be transferred from low temperature source to high temperature source

C. all of the above

D. heat cant be transferred from low temperature to high temperature source without the aid of external energy

E. heat can be transferred for low temperature to high temperature source by using refrigeration cycle.

883. Entropy change depends on___________________?
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A. thermodynamic state

B. mass transfer

C. change of temperature

D. heat transfer

E. change of pressure and volume

884. Which of the following cycles has maximum efficiency_____________?
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A. Joule

B. Brayton

C. Stirling

D. Rankine

E. Carnot
885. For a kinematic chain to be considered as mechanism___________________?
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A. none of the above

B. two links should be fixed

C. none of the links should be fixed

D. there is no such criterion

E. one link should be fixed
886. Which of the following is false statement in respect of differences between machine and structure___________________?
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A. Machines modify movement and work, whereas structures modify forces

B. In machines, relative motion exists be-tween its members, whereas same does hot exist in case of structures

C. Efficiency of machines as well as structures is below 100%

D. Machines are run by electric motors, but structures are not

E. Machines transmit mechanical work, whereas structures transmit forces

887. Kinetic energy of the molecules in terms of absolute temperature (T) is proportional to________________?
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A. Vr

B. j

C. 1/Vr

D. J2

E. T
888. In S.H.M., the velocity vector w.r.t. displacement vector _________________?
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A. leads by 180

B. leads by 90

C. could be anywhere.

D. are in phase

E. lags by 90

889. The unitof universal gas constant is___________________?
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A. ergscm/K

B. dynes/C

C. erg/K

D. none of the above

E. watts/K

890. If heat be exchanged in a reversible manner, which of the following property of the working substance will change accordingly_________________?
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A. all of the above

B. entropy

C. internal energy

D. enthalpy

E. temperature

891. If a certain amount of dry ice is mixed with same amount of water at 80C, the final temperature of mixture will be__________________?
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A. 20C

B. 40C

C. 60C

D. 80C

E. 0C
892. Cam size depends upon__________________?
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A. outer circle

B. base circle

C. none of the above

D. pitch circle

E. prime circle

893. Thermal power plant works on______________?
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A. Brayton cycle

B. Otto cycle

C. Carnot cycle

D. Rankine cycle

E. Joule cycle

894. Addition of heat at constant pressure to a gas results in________________?
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A. raising its temperature and doing external work

B. raising its pressure

C. raising its temperature

D. raising its volume

E. doing external work

895. The efficiency of Carnot cycle is maximum for_____________________?
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A. petrol engine

B. gas engine

C. steam engine

D. well lubricated engine

E. reversible engine
896. During throttling process___________________?
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A. all of the above

B. heat exchange does not take place

C. entropy decreases

D. there is no change of internal energy of steam

E. no work is done by expanding steam

897. Stress concentration in static loading is_________________?
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A. ch is correct statement ?

898. Which of the following items is not a path function ____________________?
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A. kinetic energy

B. vdp

C. thermal conductivity

D. work

E. heat

899. Which of the following is not the intensive property___________________?
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A. heat

B. specific volume

C. pressure

D. temperature

E. density

900. For reversible adiabatic process, change in entropy is_________________?
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A. zero

B. maximum

C. unpredictable

D. minimum

E. negative.