651. Which of the following disciplines provides study of the relative motion between the parts of a machine and the forces acting on the parts___________________?
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A. mechanisms

B. applied mechanics

C. kinematics

D. kinetics

E. theory of machines
652. The deformation of a bar under its own weight compared to the deformation of same body subjected to a direct load equal to weight of the body is_______________?
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A. four times

B. double

C. one-fourth

D. half

E. same

653. The property of a material which allows it to be drawn into a smaller section is called________________?
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A. drawabihty

B. elasticity

C. malleability

D. plasticity

E. ductility
654. Moisture in freon refrigeration system causes________________?
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A. ineffective refrigeration

B. high power consumption

C. freezing automatic regulating valve

D. corrosion of whole system

E. breakdown of refrigerant

655. Absorption system normally uses the following refrigerant___________________?
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A. C02

B. ammonia

C. S02

D. Freon-11

E. Freon-22

656. The example of lower pair is_______________?
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A. automobile steering gear

B. all of the above

C. none of the above

D. straight line motion mechanisms

E. shaft revolving in a bearing

657. On the pressure-enthalpy diagram, condensation and desuperheating is represented by a horizontal line because the process ________________?
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A. involves no change in volume

B. takes place at constant enthalpy

C. takes place at constant pressure

D. takes place at constant entropy

E. takes place at constant temperature

658. Which of the following has no unit __________________?
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A. surface tension

B. bulk modulus

C. kinematic viscosity

D. elasticity

E. strain
659. The example of rolling pair is________________?
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A. bolt and nut

B. all of the above

C. ball and socket joint

D. ball bearing and roller bearing

E. lead screw of a lathe

660. The buckling load for a given material depends on___________________?
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A. slenderness ratio and area of cross-section

B. slenderness ratio, area of cross-section and modulus of elasticity

C. Poissons ratio and slenderness ratio

D. slenderness ratio and modulus of elasticity

E. Poissons ratio and modulus of elasticity

661. The stress induced in a body due to suddenly applied load compared to when it is applied gradually is________________?
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A. two times

B. four times

C. none of the above

D. half

E. same

662. The Youngs modulus of a wire is defined as the stress which will increase the length of wire compared to its original length________________?
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A. four times

B. one-fourth

C. same amount

D. double

E. half

663. The unit of Youngs modulus is__________________?
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A. kg

B. kg cm2

C. kg/cm2

D. kg/cm

E. mm/mm

664. If the radius of wire stretched by a load is doubled, then its Youngs modulus will be_______________?
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A. remain unaffected

B. halved

C. become four times

D. become one-fourth

E. doubled

665. The COP of a vapor compression plant in comparison to vapor absorption plant is ________________?
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A. more

B. less

C. same

D. unpredictable

E. more/less depending on size of plant

666. The example of spherical pair is_____________________?
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A. ball bearing and roller bearing

B. lead screw of a lathe

C. bolt and nut

D. ball and socket joint

E. none of the above

667. For proper refrigeration in a cabinet, if the temperature and vapour pressure difference between cabinet and atmosphere is high, then_________________?
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A. refrigerant with lower evaporation temperature should be used

B. smaller cabinet should be used

C. perfectly tight vapour seal should be used

D. refrigerant with high boiling point must be used

E. bigger cabinet should be used

668. The change in the unit volume of a material under tension with increase in its Poissons ratio will ________________?
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A. increase initially and then decrease

B. decrease

C. increase

D. unpredictable

E. remain same

669. In refrigerator, liquid receiver is required between condenser and flow controlling device, if quantity of refrigerant for system is_____________________?
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A. more than 10 kg

B. less than 2 kg

C. pone of the above

D. more than or equal to 3.65 kg

E. there is no such consideration

670. Proof resilience per material is known as________________?
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A. impact energy

B. resilience

C. toughness

D. proof resilience

E. modulus of resilience
671. The tendency of a body to resist change from rest or motion is known as_______________?
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A. resisting torque

B. friction

C. mass

D. resisting force

E. inertia
672. The advantage of the piston valve over D-slide valve is that in the former case____________________?
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A. wear is less

B. power absorbed is less

C. both wear and power absorbed are low

D. the pressure developed being high provides tight sealing

E. there is overall economy of initial cost, maintenance and operation

673. Aqua ammonia is used as refrigerant in the following type of refrigeration system_________________?
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A. direct

B. absorption

C. indirect

D. compression

E. none of the above

674. A body moves, from rest with a constant acceleration of 5 m per sec. The distance covered in 5 sec is most nearly_______________?
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A. 96 m

B. 62.5 m

C. 38 m

D. 124 m

E. 240 m

675. It is required to connect two parallel shafts, the distance between whose axes is small and variable. The shafts are coupled by_______________?
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A. electromagnetic coupling

B. flexible coupling

C. knuckle joint

D. Oldhams coupling

E. universal joint

676. Air refrigeration cycle is used in ____________________?
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A. domestic refrigerators

B. such a cycle does not exist

C. air conditioning

D. commercial refrigerators

E. gas liquefaction
677. One ton of the refrigeration is_________________?
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A. the refrigeration effect to produce 1 ton of ice at NTP conditions

B. the refrigeration effect to freeze 1 ton of water at 0C into ice at 0C in 24 hours

C. the cooling effect produced by melting 1 ton of ice

D. the refrigeration effect to produce 1 ton of ice in 1 hour time

E. the standard unit used in refrigeration problems

678. When it is indicated that a member is elastic, it means that when force is applied, it will________________?
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A. not stretch

B. stretch

C. none of the above

D. be safest

E. not deform

679. Under-cooling in a refrigeration cycle_________________?
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A. decreases COF

B. COP remains unaltered

C. unperdictable

D. increases COP

E. other factors decide COP

680. The maximum strain energy that can be stored in a body is known as________________?
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A. proof resilience

B. toughness

C. impact energy

D. modulus of resilience

E. resilience

681. Domestic refrigerator working on vapour compression cycle uses the following type of expansion device____________________?
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A. capillary tube

B. expansion valve.

C. thermostatic valve

D. electrically operated throttling valve

E. manually operated valve

682. If a material expands freely due to heating it will develop ____________________?
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A. bending

B. tensile stress

C. thermal stresses

D. no stress

E. compressive stress

683. A projectile is fired at an angle 9 to the vertical. Its horizontal range will be maximum when 9 is__________________?
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A. 45

B. 60

C. 90.

D. 0

E. 30

684. The domestic refrigerator uses following type of compressor ____________________?
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A. axial

B. piston type reciprocating

C. none of the above

D. centrifugal

E. miniature sealed unit

685. The elasticity of various materials is controlled by its___________________?
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A. proof stress

B. ultimate tensile stress

C. stress at elastic limit

D. tensile stress

E. stress at yield point

686. Hookes law holds good up to____________________?
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A. limit of proportionality

B. elastic limit

C. breaking point

D. plastic limit

E. yield point

687. For obtaining high COP, the pressure range of compressor should be_______________?
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A. high

B. any value

C. optimum

D. there is no such criterion

E. low
688. Which of the following would constitute a link__________________?
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A. piston, and piston rod

B. piston, piston-rod and cross head

C. piston, crank pin and crank shaft

D. piston, piston rings and gudgeon pin

E. piston rod and cross head

689. The locus of a point on a thread unwound from a cylinder will be___________________?
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A. cycloidal

B. involute

C. helix

D. a straight line

E. a circle

690. The weakest section of a diamond riveting is the section which passes through ___________________?
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A. one rivet hole of the end row

B. the first row

C. none of the above

D. the central row

E. the second row

691. If the evaporator temperature of a plant is lowered, keeping the condenser temperature constant, the h.p. of compressor required will be________________?
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A. more

B. same

C. less

D. unpredictable

E. more/less depending on rating

692. In a refrigeration cycle, the flow of refrigerant is controlled by___________________?
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A. expansion valve

B. evaporator

C. all of the above

D. compressor

E. condenser

693. It equal and opposite forces applied to a body tend to elongate it, the stress so produced is called______________________?
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A. transverse stress

B. compressive stress

C. working stress

D. tensile stress

E. internal resistanpe

694. For fluctuating loads, welsuited bearing is_________________?
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A. sleeve bearing

B. thrust bearing

C. needle roller bearing

D. roller bearing

E. ball bearing

695. When two plates are butt together and riveted with cover plates with two rows of rivets, the joi;it is known as ___________________?
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A. single riveted single cover butt joint

B. butt joint

C. double riveted double cover butt joint

D. single riveted double cover butt joint

E. lap point

696. The internal reaction in bottom 80 cm length will be________________?
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A. same in both cases

B. zero in first case

C. different in both cases

D. data are not sufficient to determine same

E. none of the above

697. Super heating in a refrigeration cycle __________________?
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A. decreases COP

B. COP remains unaltered

C. unpredictable

D. increases COP

E. other factors decide COP

698. For steel, the ultimate strength in shear as compared to in tension is nearly _________________?
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A. two-third

B. one-third

C. one-fourth

D. half

E. same

699. A certain refrigerating system has a normal operating suction pressure of 10 kg/cm gauge and condensing pressure of about 67 kg/cm. The refrigerant used is________________?
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A. Freon

B. Carbon dioxide

C. Ammonia

D. Hydrocarbon refrigerant

E. Brine

700. The intensity of stress which causes unit strain is called_______________?
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A. principal stress

B. modulus of rigidity

C. unit stress

D. modulus of elasticity

E. bulk modulus