Mechanical Engineering Quiz 8

1 / 50

Which of the following depreciation system ensures that the interest be charged on the cost of machine asset every year on the book value, but the rate of depreciation every year remains constant_____________________?

annuity charging method

A-B-C charging method

straight line method

sinking fund method

2 / 50

The mean effective pressure obtained from engine indicator indicates the________________?

average pressure

maximum pressure developed

minimum pressure

instantaneous pressure at any instant

3 / 50

Time study is__________________?

time taken by workers to do a job

machine setting time

the appraisal, in terms of time, of the value of work involving human effort

method of fixing time for workers

4 / 50

The C.G. of a plane lamina will not be at its geometrical centre in the case of a__________________?

equilateral triangle

circle

square

right angled triangle

5 / 50

Density of water is maximum at__________________?

100?C

0?C

0?K

4?C

6 / 50

If n = number of members andy = number of joints, then for a perfect frame, n =________________?

3/-2

2/-3

j-2

2j-l

7 / 50

A large Roynold number is indication of________________?

steady flow

highly turbulent flow

smooth and streamline flow

laminar flow

8 / 50

A key capable of tilting in a recess milled out in a shaft is known as______________________?

gib head key

feather key

flat saddle key

wood-ruff key

9 / 50

Bomb calorimeter is used to determine ___________________?

Lower calorific value at constant volume ,

Higher calorific value at constant pressure

Lower calorific value at constant pressure

Higher calorific value at constant volume

10 / 50

According to Avogadro?s Hypothesis ______________________?

the molecular weights of all the perfect gases occupy the same volume under same conditions of pressure and temperature

product of the gas constant and the molecular weight of an ideal gas is constant

the sum of partial pressure of mixture of two gases is sum of the two

gases have two values of specific heat

11 / 50

Mach number is significant in_____________________?

simultaneous motion through two fluids where there is a surface of dis-continuity, gravity force, and wave making effects, as with ship?s hulls

all of fhe above

full immersion or completely enclosed flow, as with pipes, aircraft wings, nozzles etc.

supersonics, as with projectiles and jet propulsion

12 / 50

The difference of pressure between the inside and outside of a liquid drop is _______________?

p = T/r

p = T/2r

p = Txr

p = 2T/r

13 / 50

An example of amorphous material is____________?

glass

lead

silver

zinc

14 / 50

Combustion in compression ignition engines is____________________?

homogeneous

heterogeneous

None

laminar

15 / 50

The draw of cotter need not exceed_________________?

20 mm

5 mm

3 mm

10 mm

16 / 50

Micro motion study is__________________?

motion study of a sequence of operations conducted systematically

study of man and machine conducted simultaneously

motion study* observed on enhanced time intervals

analysis of a man-work method by using a motion picture camera with a timing device in the field of view

17 / 50

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________________?

dynamic loading

completely reversed loading

static loading

combined static and dynamic loading

18 / 50

String diagram is used when__________________?

all of the above

idle time is to be reduced

team of workers is working at a place

material handling is to be done

19 / 50

Molecular volume of any perfect gas at 600 x 103 N/m2 and 27?C will be ____________________?

4.17m3/kgmol

0.15 m3/kg mol

41.7 m3/kg mol

400 m3/kg mol

20 / 50

The ratio of absolute viscosity to mass density is known as_________________?

specific viscosity

coefficient of viscosity

viscosity index

kinematic viscosity

21 / 50

A nuclear unit becoming critical means_______________?

it is generating power to rated capacity

chain reaction that causes automatic splitting of the fuel nuclei has been established

it is capable of generating much more than rated capacity

there is danger of nuclear spread

22 / 50

Free surface of a liquid behaves like a sheet and tends to contract to smallest possible area due to the_________________?

force of adhesion

force of diffusion

force of friction

force of cohesion

23 / 50

The C.O.P of a refrigeration cycle with increase in evaporator temperature, keeping condenser temperature constant, will______________________?

increase

may increase or decrease depending on the type of refrigerant used

decrease

remain unaffected

24 / 50

A boiling water reactor uses following as fuel________________?

thorium

plutonium

enriched uranium

25 / 50

Which is more viscous lub oil_________________?

SAE 50

SAE 4?

SAE 80

SEA 30

26 / 50

Capillary action is due to the_________________?

all of the above

cohesion of the liquid

adhesion of the liquid molecules and the molecules on the surface of a solid

surface tension

27 / 50

Detonation is caused by the following unstable compounds______________________?

peroxides, aldehydes and ketones

peroxides, aldehydes, oxides and sul-phides

aldehydes, oxides and ketones

ketones and sulphur compounds

28 / 50

If p = bearing pressure on projected bearing area, z = absolute viscosity of lubricant, and N = speed of journal, then the bearing characteristic number is given by________________?

Z/pN

p/ZN

N/Zp

ZN/p

29 / 50

Routing assists engineers in deciding in advance___________________?

the methods of proper utilization of machines

the flow of material in the plant

the methods of proper utilization of manpower

the layout of factory facilities

30 / 50

A particle moves along a straight line such that distance (x) traversed in t seconds is given by x = t2 (t ? 4), the acceleration of the particle will be given by the equation __________________?

6f-8

6f-4

3t2-lt

3t2+2t

31 / 50

Cold rolled steel sheets contain carbon of the following order___________________?

0.10%

0.20%

0.60%

0.40%

32 / 50

Water and sediment in fuel oil can be removed by _______________________?

heating the oil in the settling tanks

burning the oil

cooling the oil in the settling tanks

suspension

33 / 50

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

breaking point of the material

elastic point of the material

yielding point of the material

plastic point of the material

34 / 50

Antifriction bearings are__________________?

hydrodynamic bearings

sleeve bearings

none of the above

thin lubricated bearings

35 / 50

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________________?

Brine

Ammonia

Freon

Carbon dioxide

36 / 50

Work study is concerned with_________________?

improving present method and finding standard time

improving production planning and control

improving production capability

motivation of workers

37 / 50

A two stroke crank compressed engine has following ports in the cylinder_______________?

suction port, exhaust port and transfer port

suction port and exhaust port

suction port and transfer port

transfer port only

38 / 50

An engine indicator is used to determine the following___________________?

volume of cylinder

temperature

m.e.p. and I.H.P.

speed

39 / 50

Presence of moisture in a refrigerant affects the working of___________________?

condenser

compressor

evaparator

expansion valve

40 / 50

Drop forging dies contain carbon of the order of_________________?

0.1 to 0.2%

0.25 to 0.5%

0.7 to 0.9%

0.6 to 0.7%

41 / 50

Heat flows from one body to other when they have_________________?

different atomic structure

different temperatures

different specific heat

different heat contents

42 / 50

The main advantage of line organisation is its_______________?

effective command and control

all of the above

defined responsibilities at all levels

rigid discipline in the organisation

43 / 50

Steel made from phosphatic iron is_________________?

tough

hard

brittle

ductile

44 / 50

Work done is zero for the following process_________________?

free expansion

throttling

all Of the above

constant volume

45 / 50

During a tensile test on a specimen of 1 cm cross-section, maximum load observed was 8 tonnes and area of cross-section at neck was 0.5 cm2. Ultimate tensile strength of specimen is___________________?

22 tonnes/cm2

4 tonnes/cm2

16 tonnes/cm2

8 tonnes/cm2

46 / 50

Which is false statement about advantages of multistage compressor in comparison to single stage compressor_________________?

less loss of air due to leakage past the cylinder

lower volumetric efficiency

less power requirement

better mechanical balance

47 / 50

A chain comprises of 5 links having 5 joints. Is it kinematic chain ?

data are insufficient to determine it

yes

it is a marginal case

48 / 50

Critical Path Net Work helps an engineer_________________?

to concentrate his attention on critical activities

all of the above

to divert the resources from non-critical advanced activities to critical activities

to be cautious for avoiding any delay in the critical activities to avoid delay of the whole project

49 / 50

The compression ratio in a jet engine varies proportional to ____________________?

Vspeed

speed

altitude

speed

50 / 50

The knock in diesel engine occurs due to____________________?

instantaneous and rapid burning of the first part of the charge

delayed burning of the first part of the charge

reduction of delay period

instantaneous atuo iginition of last part of charge

Provide Your Information

NameEmailPhone Number

Your score is

The average score is 83%