0% 3 Mechanical Engineering Quiz 12 1 / 50 Which of the following cycles uses air as the refrigerant__________________? Ericsson Bell-coleman Carnot Stirling 2 / 50 If mercury in a barometer is replaced by water, the height of 3.75 cm of mercury will be following cm of water________________? 52.2 cm 52 cm 51 cm 50 cm 3 / 50 The ratio of indicated thermal efficiency to the corresponding air standard cycle efficiency is called__________________? overall efficiency net efficiency efficiency ratio relative efficiency 4 / 50 The number of centers in a crank driven slider crank mechanism are_______________? 4 2 6 0 5 / 50 The total pressure on the surface of a vertical sluice gate 2 m x 1 m with its top 2 m surface being 0.5 m below the water level will be ________________? 500 kg 1500 kg 1000 kg 2000 kg 6 / 50 True one-dimensional flow occurs when_________________? the magnitude and direction of the velocity do not change from point to point in the fluid the fluid particles move in plane or parallel planes and the streamline pat-terns are identical in each plane the velocity of successive fluid par-ticles, at any point, is the same at suc-cessive periods of time the direction and magnitude of the veiocity at all points are identical 7 / 50 Working principle of dead weight pressure gauge tester is based on_______________? Avogadro?s hypothesis Pascal?s law Newton?s law of viscosity . Dalton?s law of partial pressure 8 / 50 Diesel engines as compared to petrol engines require ______________________? smaller flywheel same size flywheel bigger flywheel no flywheel 9 / 50 Volumetric efficiency of a compressor without clearance volume________________? increases with increase in compression ratio may increase/decrease depending on compressor capacity is not dependent upon compressin ratio decreases with increase in compression ratio 10 / 50 In order to avoid tearing of the plate at edge, the distance from the center line of the rivet hole to the nearest edge of the plate in terms of dia of rivet d should be equal to__________________? 1.25 d d 1.75 d 1.5 d 11 / 50 The jnaximum combustion pressure in gas turbine as compared to I.C engine is_________________? depends on other factors same more less 12 / 50 The example of higher pair is_________________? belt, rope and chain drives all of the above gears, cams ball and roller bearings 13 / 50 When the flow parameters at any given instant remain same at every point, then flow is said to be___________________? quasi static laminar uniform steady state 14 / 50 The coefficient of performance is the ratio of the refrigerant effect to the_________________? all of the above heat of compression work done by compressor enthalpy increase in compressor 15 / 50 If 850 kg liquid occupies volume of one cubic meter, men 0.85 represents its__________________? specific weight specific mass specific gravity specific density 16 / 50 Which is the false statement about wrought iron. It has________________? high resistance to rusting and corrosion ability of hold protective coating uniform strength in all directions high ductility 17 / 50 Thermal conductivity of glass-wool varies from sample to sample because of variation in ________________ ? density all of the above porosity composition 18 / 50 Shear stress induced in a shaft subjected to tension will be__________________? maximum at center maximum at periphery and zero at center uniform throughout none of the above 19 / 50 If the atmospheric pressure on the surface of an oil tank (sp. gr. 0.8) is 0.2 kg/cm?, the pressure at a depth of 50 m below the oil surface will be_________________? 2 meters of water column 5 meters of water column 6 meters of water Column 3 meters of water column 20 / 50 Carbonation of coal is the process of________________________? binding the pulverised coal into brick-ettes pulverising coal in inert atmosphere strongly heating coal continuously for about 48 hours in the absence of air in a closed vessel heating wood in a limited supply of air at temperatures below 300?C 21 / 50 A circular bar moving in a round hole is an example of_______________? completely constrained motion incompletely constrained motion partially constrained motion successfully constrained motion 22 / 50 Induction hardening is the process of_____________________? increasing hardness throughout hardening surface of workpiece to ob-tain hard and wear resistant surface inducing hardness by continuous process heating and cooling rapidly 23 / 50 In loop scavenging, the top of the piston is________________? contoured slanted flat depressed 24 / 50 For pipes, turbulent flow occurs when Reynolds number is _____________________? less than 4000 more than 4000 less than 2000 between 2000 and 4000 25 / 50 A fast breeder reactor uses following as fuel_________________? plutonium enriched uranium U235 thorium 26 / 50 In a free vortex motion, the radial component of velocity everywhere is________________? non-zero and finite minimum maximum zero 27 / 50 The stress induced in a body due to suddenly applied load compared to when it is applied gradually is________________? two times same half four times 28 / 50 On Mollier chart, free expansion, or throttling process from high pressure to atmosphere is represented by_______________? straight inclined line curved line vertical straight line horizontal straight line 29 / 50 Which is not correct statement about effect of sulphur in fuel ___________________? it helps in electrostatic precipitation of ash in flue-gases it erodes furnace walls it has heating value None 30 / 50 A reactor capable of converting a ferrite material into fissile isotopes is called____________________? breeder reactor boiling water reactor regenerative reactor fast breeder reactor 31 / 50 The proximate analysis of fuel lists__________________? various chemical constituents, carbon, hydrogen, oxygen etc, plus ash as per-cents by volume fuel constituents as percents by volume of moisture, volatile, fixed carbon and ash various chemical constituents, carbon, hydrogen, oxygen, etc, plus ash as per-cents by weight fuel constituents as percents by weight of moisture, volatile, fixed carbon and ash 32 / 50 Specific heat of air at constant pressure is equal to___________________? 0.24 1 0.17 0.21 33 / 50 Change in enthalpy of a system is the heat supplied at___________________? constant volume constant entropy constant pressure constant temperature 34 / 50 Specific weight of water in S.I. units is equal to ________________? 9.81 xlO3 N/m3 1000 N/m3 9.81 xlO6N/m3 10000 N/m3 35 / 50 Which of the following is used for bearing liner_______________? bell metal bronze gun metal babbit metal 36 / 50 If value of n is infinitely large in a polytropic process pV? = C, then the process is known as constant_____________________? pressure enthalpy volume temperature 37 / 50 In a darg link quick return mechanism, the shortest link is always fixe The sum of the shortest and longest link is _______________? greater than sum of other two less than sum of other two equal to sum of other two there is no such relationship 38 / 50 Peaucellier mechanism has__________________? four links eight links twelve links six links 39 / 50 The difference between cornish boiler and lancashire boiler is that_________________? former contains one fire tube and latter contains two fire tubes former is fire tube type and latter is water tube type boiler former is water tube type and latter is fire tube type None 40 / 50 Applications in which stresses are encountered in one direction only uses following type of threads____________________? buttress acme square metric 41 / 50 The main interest of shielding in nuclear reactor is protection against_______________? neutrons and gamma rays a, P, and y rays X-rays infra-red rays 42 / 50 Stefan Boltzmann law is applicable for heat transfer by __________________? radiation conduction and radiation combined conduction convection 43 / 50 The values of velocity and acceleration of piston at near dead center for a slider-crank mechanism will be________________? 0, and more than co2r 0, 0 0, and less than coV cor, 0 44 / 50 Which of the following instrument can be used for measuring speed of a submarine moving in deep sea__________________? hot wire anemometer pitot tube Orifice plate Venturimeter 45 / 50 According to fan laws, at constant speed and capacity, the pressure and power vary_____________________? inversely as density inversely as square root of density directly as the air or gas density as square of density 46 / 50 Ultimate analysis of fuel is determination of percentage of____________________? fixed carbon, ash, volatile matter, moisture carbon, hydrogen, nitrogen, sulphur, moisture lower calorific value higher calorific value 47 / 50 If petrol is used in a diesel engine, then______________? higher knocking will occur efficiency will be low black smoke will be produced low power will be produced 48 / 50 For pipes, laminar flow occurs when Roynolds number is__________________? more than 4000 less than 2000 less than 4000 between 2000 and 4000 49 / 50 Points of arrest for iron correspond to__________________? stages at which properties do not change with increase in temperature stages at which further heating does not increase temperature for some time there is nothing like points of arrest stages at which allotropic forms change 50 / 50 The COP of a vapor compression plant in comparison to vapor absorption plant is ________________? same more/less depending on size of plant less more Provide Your Information Your score is The average score is 79% LinkedIn Facebook Twitter 0% Restart quiz Send feedback Share on facebook Facebook Share on twitter Twitter Share on whatsapp WhatsApp PrevMechanical Engineering Quiz 11 Mechanical Engineering Quiz 13Next
