801. The e.g. of a link in any mechanism would experience_________________?
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A. no acceleration

B. linear acceleration

C. angular acceleration

D. both angular and linear accelerations

E. none of the above

802. The stress at which extension of the material takes place more quickly as compared to the increase in load is called______________?
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A. plastic point of the material

B. elastic point of the material

C. breaking point of the material

D. ultimate point of the material

E. yielding point of the material
803. Crowning on pulleys helps__________________?
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A. in decreasing the slip of the belt

B. for automatic adjustment of belt posi-tion so that belt runs centrally

C. increase belt and pulley life

D. in increasing velocity ratio

E. none of the above

804. Shear stress induced in a shaft subjected to tension will be__________________?
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A. maximum at periphery and zero at center

B. maximum at center

C. none of the above

D. uniform throughout

E. average value in center

805. Pulley in a belt drive acts as_______________?
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A. sliding pair

B. turning pair

C. surface pair

D. cylindrical pair

E. rolling pair
806. A thin mild steel wire is loaded by adding loads in equal increments till it breaks. The extensions noted with increasing loads will behave as under_________________?
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A. increase uniformly

B. uniform throughout

C. increase rapidly first and then uniformly

D. increase uniformly first and then increase rapidly

E. first increase and then decrease

807. The total elongation produced in a bar of uniform section hanging vertically downwards due to its own weight is equal to that produced by a weight________________?
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A. of same magnitude as that of bar and applied at the lower end

B. none of the above

C. half of the square of weight of bar applied at lower end

D. half the weight of bar applied at lower end

E. one-fourth of weight of bar applied at lower end

808. The distance between the centres of the rivets in adjacent rows of zig-zag riveted joint is known as ____________________?
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A. lap

B. diagonal pitch

C. pitch

D. diametral pitch

E. back pitch

809. A beam is loaded as cantilever. If the load at the end is increased, the failure will occur ___________________?
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A. none of the above

B. at the tip below the load

C. at the support

D. anywhere

E. in the middle

810. The evolution of heat of solution takes place in ammonia absorption plant when _____________________?
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A. ammonia vapour is driven out of solution

B. lithium bromide is driven out of solution

C. weak solution mixes with strong solution

D. lithium bromide mixes with ammonia

E. ammonia vapour goes into solution
811. The necessary condition for forces to be in equilibrium is that these should be_____________________?
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A. coplanar

B. meet at one point ;

C. both A. and B. above

D. all be equal

E. something else

812. The leaks in a refrigeration system using Freon are detected by____________________?
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A. smelling

B. sulphur sticks which on detection gives white smoke

C. using reagents

D. halide torch which on detection produces greenish flame lighting

E. sensing reduction in pressure

813. With single Hookes joint it is possible to connect two shafts, the axes of which have an angular misalignment up to ________________?
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A. 60.

B. 30

C. 20

D. 10

E. 40
814. Efficiency of a riveted joint is the ratio of its strength (max. load it can resist without failure) to the strength of the unpunched plate in_________________?
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A. compression

B. bearing

C. any one of the above

D. tension

E. none of the above

815. Coulomb friction is the friction between_____________________?
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A. two lubricated surfaces

B. bodies having relative motion

C. electrically charged particles

D. two dry surfaces

E. solids and liquids

816. One watt is equal to__________________?
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A. 1 Nm/s

B. 1 kNm/mt

C. 1 N/mt

D. 1 kNm/hr

E. 1 Nm/hr

817. General gas equation is____________________?
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A. Cp-Cv = Wj

B. PV = C

C. PV=KiRT

D. PV=mRT

E. PV=nRT

818. According to kinetic theory of gases, the absolute zero temperature is attained when___________________?
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A. kinetic energy of the molecules is zero

B. mass is zero

C. specific heat of gas is zero

D. pressure of the gas is zero

E. volume of the gas is zero

819. Gases have___________________?
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A. two values of specific heat

B. under some conditions one value and sometimes two values of specific heat

C. three values of specific heat

D. no value of specific heat

E. only one value of specific heat

820. The endurance limit of a material with finished surface in comparison to rough surface is_________________?
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A. less

B. same

C. more or less depending on quantum of load

D. unpredictable

E. more
821. A chain comprises of 5 links having 5 joints. Is it kinematic chain ?
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A. yes

B. data are insufficient to determine it

C. no

D. it is a marginal case

E. unpredictable

822. If a fluid expands suddenly into vacuum through an orifice of large dimension, then such a process is called___________________?
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A. hyperbolic expansion

B. throttling

C. adiabatic expansion

D. free expansion

E. parabolic expansion

823. Other method of reducing shock load in the above case can be_________________?
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A. other factors would decide same

B. to decrease length

C. unaffected by length

D. to increase length

E. none of the above

824. Angle of dwell of cam is defined as the angle________________?
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A. moved by the cam from a beginning of ascent to the termination of descent

B. during which the follower returns to its initial position

C. of rotation of the cam for definite displacement of the follower

D. moved by the cam from the instant the follower begins to rise, till it reaches its highest position

E. through which the cam rotates during the period in which the follower remains in the highest position
825. The absolute acceleration of any point P in a link about center of rotation 0 is___________________?
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A. at 45 to PO

B. perpendicular to PO

C. none of the above

D. along OP

E. along PO

826. Otto cycle consists of following four processes____________________?
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A. two isentropics, one constant volume and one constant pressure

B. none of the above

C. two isentropics and two constant pres-sures

D. two isentropics and two constant volumes

E. two isothermals and two isentropics

827. Resilience of a material is important, when it is subjected to________________?
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A. shock loading

B. thermal stresses

C. wear and tear

D. fatigue

E. combined loading

828. Angular acceleration of a link can be determined by dividing the___________________?
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A. all of the above

B. centripetal component of acceleration with length of link

C. none of the above

D. resultant acceleration with length of link

E. tangential component of acceleration with length of link
829. An isolated system is one in which_____________________?
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A. mass does not cross boundaries of the system, though energy may do so

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

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

D. mass crosses the boundary but not the energy

E. thermodynamic reactions do not occur

830. In a rigid link OA, velocity of A w.r.t. will be___________________?
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A. parallel to OA

B. perpendicular to OA

C. at 45 to OA

D. along AO

E. along OA

831. A gas is compressed in a cylinder by a movable piston to a volume one-half its original volume. During the process 300 kJ heat left the gas and internal energy remained same. The work done on gas in Nm will be___________________?
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A. 30 Nm

B. 30,000 Nm

C. 300,000 Nm

D. 300 Nm

E. 3000 Nm

832. The direction of Coriolis component of acceleration is the direction _____________________?
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A. along tangential acceleration

B. along perpendicular to angular velocity

C. of relative velocity vector for the two coincident points rotated by 90 in the direction of the angular velocity of the rotation of the link

D. along the centripetal acceleration

E. none of the above.

833. If a system after undergoing a series of processes, returns to the initial state then__________________?
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A. process is executed in closed system cycle

B. sum of heat and work transfer will be zero

C. process is thermodynamically in equilibrium

D. no work will be done by the system

E. its entropy will change due to irreversibility

834. Which of the following cycles is not a reversible cycle_____________________?
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A. Ericsson

B. none of the above

C. Joule

D. Carnot

E. Stirling

835. Which of the following mechanisms produces mathematically an exact straight line motion____________________?
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A. Tchabichiff mechanism

B. Grasshopper mechanism

C. Watt mechanism

D. Peaucelliers mechanism

E. Ackermann mechanism

836. The energy of molecular motion appears as________________?
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A. potential energy

B. friction

C. increase in pressure

D. surface tension

E. heat
837. Which of the following processes are thermodynamically reversible___________________?
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A. hyperbolic and pV = C

B. isothermal and adiabatic

C. constant volume and constant pressure

D. throttling

E. free expansion

838. In an isothermal process, the internal energy of gas molecules________________?
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A. decreases

B. shows unpredictable behaviour

C. may increase/decrease depending on the properties of gas

D. increases

E. remains constant
839. In its simplest form, a cam mechanism consists of following number of links___________________?
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A. 3

B. 4

C. 2

D. 1

E. none

840. Which of the following laws is applicable for the behavior of a perfect gas__________________?
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A. Charleslaw

B. all of the above

C. Boyles law

D. Gay-Lussac law

E. Joules law

841. In a free expansion process___________________?
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A. work done is zero

B. heat transfer is zero

C. both A. and B. above

D. work done is zero but heat increases

E. work done is zero but heat decreases

842. If both Stirling and Carnot cycles operate within the same temperature limits, then efficiency of Stirling cycle as compared to Carnot cycle___________________?
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A. depends on other factors

B. none of the above

C. less

D. more

E. equal
843. The notch angle of the Izod impact test specimen is________________?
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A. 20

B. 30

C. 10

D. 60.

E. 45
844. The unit of power in S.I. units is_______________________?
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A. joule

B. watt

C. erg

D. pascal

E. newton

845. The approximate straight line mechanism is a____________________?
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A. 8 bar linkage

B. 5 bar linkage

C. 3 bar linkage

D. four bar linkage

E. 6 bar linkage

846. Which of the following processes is irreversible process___________________?
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A. isothermal

B. adiabatic

C. throttling

D. none of the above

E. all of the above

847. An eccentric sheave pivoted at one point rotates and transmits oscillatory motion to a link whose one end is pivoted and other end is connected to it. This mechanism has___________________?
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A. 5 links

B. 4 links

C. none of the above

D. 2 links

E. 3 links

848. Kinematic pairs are those which have__________________?
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A. point or line contact between the two elements when in motion

B. none of the above

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

D. two elements that permit relative mo-tion

E. elements of pairs not held together mechanically

849. Stress concentration is caused due to_____________________?
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A. pitting atpoints or areas at which loads on a member are applied

B. all of the above

C. none of the above

D. variation in properties of material from point to point in a member

E. abrupt change of section

850. Plastic flow in ductile materials_____________________?
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A. increases the seriousness of static load-ing stress concentration

B. depends on other considerations

C. lessens the seriousness of static loading stress concentration

D. none of the above

E. has no effect on it