1 Change in entropy for isothermal process carried on a gas whose specific volume changes from V1 to V2 and pressure changes from P1 to P2 is given by

delta S loge

delta S R loge

delta S loge

delta S loge R loge

2 Following is the outcome of first and second laws of thermodynqmics.

Q W delta u

T.ds dh v.dp

T.ds dh v.dp

Q m.cp.dT

3 Availability function is expressed as

Phi U PoV T05

Phi dU PoV TodS

Phi U PodV TodS

Phi U PoV +ToS

4 Characteristic gas constant of any perfect gas:

increases with increase in temperature

increases with increase in pressure

is a function of pressure and temperature

is a constant

5 Indicate which one of the following statements is true in case of two shafts connected in series:

Shear stress in each shaft is the same

Torque in each shaft is the same

Angle of twist in each shaft is the same

None of the above

6 Maximum shear stress theory is also known as

Rankine's theory

St. Venant's theory

Guest's and Tresca's theory

Mises and Henkey's theory

7 The variation of shear stress in a circular shaft subjected to tension is

linear

parabolic

hyperbolic

uniform

8 The point of contraflexture lies where

shear force changes sign

bending moment is zero or changes sign

shear force is zero

bending moment is maximum

9 The total strain energy stored in a body is known as:

Impact energy

Proof resilience

Resilience

Modulus of resilience

10 Maximum deflection of a simply supported beam with a total uniformly distributed load is

wl3/384 EI

5wl3/384 EI

wl3/48 EI

5wl3/48 EI

11 In a transversally loaded beam the maximum compressive stress occurs at the

top edge

bottom edge

neutral axis

none of the above

12 When a rectangular section of a beam is subjected to a shearing force, the ratio of maximum shear stress to the average shear stress is

2.0

1.75

1.5

1.25

13 The curie temperature for interstitial solid solution of carbon in low temperature BCC-alpha iron is:

910C

768C

1400C

727C

14 Graphite in the form of flakes is observed in

spheroidal graphite cast iron

gray cast iron

white heart malleable

black heart malleable

15 The fatigue strength of mild steel is

Equal to its tensile strength

Equal to its yield strength

More than its tensile strength

Lower than its yield strength

16 Nitriding is a process used to

reduce the wear resistance

increase the wear resistance

increase the surface hardness

none of the above

17 The percentage of chromium in stainless steel used for cutlery is usually in the range of

0.5% to 1.1

1.2% to 2.7%

10% to 20%

20% to 30%

18 Austenite F.C.C structure is found temperature.

1333°F to 2066°F

1670°F to 2500°F

1333°F to 2702°F

2066°F to 2802°F

19 The maximum diameter of bubble formed on the heating surface depends on:

Tension between liquid and vapour

Tension between liquid and solid surface

Tension between vapour and solid surface

All ofthe above

20 "Total emissive power from a radiating plane surface in any direction is directly proportional to the cosine of the angle of emission". This is called as

Law of radiation

Lambert's law

Law of emission

Stefen-Boltzmann law

21 Hot gases escaping from the chimney rise by convection and then diffuse into the air above the chimney is an example of

Mass transfer by diffusion

Mass transfer by convection

Eddy diffusion

Mass transfer by change of phase

22 The region of flow which develops from the leading edge of the plate in which the effects of viscosity are observed is called as

Viscous layer

Boundary layer thickness

Boundary layer

Inviscid layer

23 A connecting rod, should be for buckling about X-axis.

both ends fixed

both ends hinged

one end fixed and the other end hinged

one end fixed and the other end free

24 When a shaft is subjected to a bending moment and a twisting moment then the equivalent twisting moment is equal to

M T

M2 T2

sq.rt of(M2 T2)

sq.rt of(M2 T2)


25 A spring-mass system having a mass of 10 kg and spring stiffness of 4000 N/m vibrates on a horizontal surface. Its natural frequency of vibration is

5 rad/sec

10 rad/sec

15 rad/sec

20 rad/sec

26 Two close coiled helical springs with stiffness K1 and K2 respectively are connected in series. The stiffness of an equivalent spring is given by

K1.K2 K1+K2

K1-K2 K1+K2

K1+K2 K1.K2

K1-K2 K1.K2

27 The term is used for ROM that can be programmed and their contents altered. Such a chip contains a series of small electronic circuit cells which can store charge.

R.O.M.

P.R.O.M.

E.P.R.O.M.

E.E.P.R.O.M.

28 CPU in microprocessor is used to

Handle communication between microprocessor and outside world

To hold the program instruction and data

Recognise and carry out program instructions

All of the above

29 Root of the characteristic equation of control system influence its:

Steady state response

Steady state and transient response

Transient response and stability

None of the above

30 State the type of control system used below:


Open Loop Control System

Closed Loop Control System

Sequential Control System

None of the above

31 is the length of the pitch circle diameter per tooth.

Addendum

Module

Backlash

Face width

32 The coriolis acceleration component can be estimated by using equation

wv

2 wv

3 wv

4 wv

33 In multiplate clutch the total no. of disks equals to

number of pairs of contacting surfaces

number of pairs of contacting surfaces

number of pressure plates

number of pressure plates

34 The size of a cam depends upon:

Base circle

Pitch circle

Prime circle

Pitch curve

35 Match the following:
G 41 Absolute dimensioning
G 42 Incremental dimensioning
G 90 Cutter compensation left
G 91 Cutter compensation right











36 The sintering temperature and time vary with the following factors:
Type of metal powder.
Compressive load used.
Strength requirements of finished parts.
None of the above

Which of the statements given below is/are correct

only

and only

and only

only

37 Which of the following expressions does not represent the speed of sound in medium?

sq.rt of

sq.rt of

sq.rt of

sq.rt of

38 In a rotating fluid flow system
V absolute velocity of a jet

Vr relative velocity of the same jet with respect to its nozzle and

u absolute velocity of the nozzle.

The relationship between these vectors is

V Vr u

V Vr u

Vr V u

u V Vr

39 The power transmitted through the pipe is maximum when head loss due to friction in pipe is equal to

1rd/3 of the total supply head

1th/4 of the total supply head

1th/5 of the total supply head

1th/8 of the total supply head

40 In two dimensional flow acceleration component in the X-direction is given by ax
where, v are the velocity components in x and y directions respectively and t is time.

du/dt u du/dx v dv/dy

u du/dx v du/dy

du/dt u du/dx v du/dy

u du/dt u du/dx v dv/dy

41 If a vessel containing liquid moves downward with a constant acceleration, then:

the pressure throughout the liquid mass is atmospheric

the pressure in the liquid mass is greater than the hydrostatic pressure

there will be vacuum in the liyuid

the pressure throughout the liquid mass is greater than atmospheric

42 If the velocity u in a turbulent boundary layer varies as the growth of the boundary layer thickness gama/x varies as Where Rex is the local Reynold's number.







Rex^-1

43 In axially loaded elastic member stiffness is

Directly proportional to Young's modulus and inversely proportional to area of cross section

Directly proportional to member length and inversely proportional to area of cross section

Directly proportional to Young's modulus and inversely proportional to member length

Inversely proportional to member length and inversely proportional to Young's modulus

44 Instrument that measures pressure is generally classified as

Non -linear

Linear

Free of hysteresis

None of the above

45 The least count of a metric vernier calliper having 25 divisions on vernier scale matching with 24 divisions on main scale main scale division 0.5 mm) is

0.05 mm

0.01 mm

0.02 mm

0.001 mm

46 Slope of calibration curve indicates its

Resolution

Repeatability

Static sensitivity

Hysterris

47 If the critical ratio is less than one, then it indicates that

the job is already late

the job is on schedule

the job has some slack available to it

the top priority should not be given

48 For the first setup in applying SMED to a particular machine, which time must be analysed first for that machine

lead time

manufacturing time

production time

setup time

49 Around the rated (full load) speed, the slip of the induction motor is and the torque -slip relationship is in the region.

low, non-linear

high, linear

low, linear

high, non-linear

50 Which of the following induction motors, has highest starting torque?

Squirrel cage

Slip ring

Deep bar squirrel cage

Double bar squirrel cage

51 In stepper motor, step angle a is given by
where, Ms No. of stator phases, Nr No. of rotor teeth

alpha 360° /MsNr

alpha MsNr 360°

alpha x 360°

alpha x 360°

52 In a synchronous generator delivering lagging power factor load

the excitation emf leads terminal voltage by the power angle

the excitation emf lags terminal voltage by the power angle

the excitation voltage is in phase with the terminal voltage

none of these

53 Which of the following statements related to a transformer are incorrect
The maximum voltage regulation occurs at leading pf
The maximum voltage regulation occurs at lagging pf
The voltage regulation at zero pf is always zero
The voltage regulation can be negative at leading pf

Answer options

and

and

and

and

54 Two alternators are connected in parallel and the active power shared remains constant. The reactive power shared by them can be controlled by

Changing the mechanical power input only

Changing the excitation only

Changing both excitation and mechanical power input

None of the above

55 Why is ring feeder preferred over radial feeder in distribution system?
Voltage drop in the feeder is less
Power factor is higher
Supply is more reliable

Select the correct option

and

and

and

and

56 The long transmission line gives better voltage profile at rated load when:

Shunt reactor is at sending end

Shunt capacitance is at sending end

Shunt capacitor is at receiving end

Shunt reactor is at receiving end

57 The DC resistance of transmission line is less than its AC resistance due to

Proximity effect

Skin effect

Both and

None of the above

58 More efficient plants are used as

Base load stations

Peak load stations

Both and

None of the above

59 Loss angle of cable is delta then power factor of the cable is given by

COS delta

Sin delta

Independent of delta

None of the above

60 In order to have lower cost of Electrical energy generation:

load factor and diversity factor should be low

load factor should be low but diversity factor should be high

load factor should be high but diversity factor should be low

load factor and diversity factor should be high

61 A transfer function may be defined only for a

Linear and stationary system

Non-linear and stationary system

Linear and non-stationary system

Non-linear and non-stationary system

62 A PD controller is used to compensate a system. Compared to the uncompensated system, the compensated system has

A higher type number

Zero steady state error

Improved transient response

Larger transient overshoot

63 A.c. Tachometer:
works on the principle of induction generator
is brushless
reduces ripple
increases electro-magnetic noise

Answer options

only

and

and

All four and

64 As compared to closed loop system, an open loop system is

more stable as well as more accurate

less stable as well as less accurate

more stable but less accurate

less stable but more accurate

65 In which of the following modes the torque will be negative?

Forward motoring and reverse motoring

Forward regeneration and reverse regeneration

Forward motoring and reverse regeneration

Forward regeneration and reverse motoring

66 Comment on the stability of the operating point A


Unstable

Marginally stable

Stable

Cannot find out

67 An eddy current clutch is identical in principle to an induction motor in which:

stator is allowed to rotate

rotor is allowed to rotate

both stator and rotor are allowed to rotate

none of the above

68 Which of the following is not a standard class of motor duty

Intermittent periodic duty

Intermittent duty with periodic speed changes

Short time duty

Intermittent duty, periodic duty with starting and braking

69 The prime mover to the ward Leonard system using a heavy intermittent load cannot be:

Slip ring induction motor

Sychronous motor

Cage induction motor

D.C. shunt motor

70 A 220 1500 rpm, 50 separately excited motors with armature resistance of 0.5 n is fed from a circulating current dual converter with ac voltage (line) =165 V. The converter firing angles for braking operation at rated motor torque and 1000 rpm will be:

alpha(A) 61.9 alpha(B) 118.1

alpha(A) 118.1 alpha(B) 61.9

alpha(A) 61.9 alpha(B) 61.9

alpha(A) 118.1 alpha(B) 118.1

71 Diversity factor is

Always less than one

Always greater than one

Could be equal to one

None of these

72 The cost of power generation can be reduced by
Selecting equipment of longer life and proper capacities
Running the power station at high load factor
Increasing the efficiency of the power plant
Decreasing the down time of equipment

Answer options

only

only

and

all

73 The curve shown in the figure is:


Chronological load curve

Flow duration curve

Mass curve

Annual load duration curve

74 In availability based tariff mechanism, unscheduled interchange means:
Power supplied by a generator other than its scheduled generation
Exchange of power between two distribution utilities
Exchange of power between generation and distribution utility
Power drawn by distribution utility other than scheduled drawal

Answer options

only

and only

only

and

75 In the electricity tariff mechanism, ABT stands for

Actual Base Tariff

Activity Based Tariff

Availability Based Tariff

Anticipation Based Tariff

76 Cost of power generation for a thermal station mainly depends on

Employee cost

Maintenance cost

Fuel cost

Project cost

77 In a pump installation the local atmospheric pres!nlre is 9.8 m of water, vapour pressure head is 0.4 m height of the pump above sump water level is 5 m. For head loss in the suction side is 0.6 the NPSH is

3.8 m

5.0 m

4.0 m

15.8

78 The meter constant of an energy meter is expressed in terms of revolutions per

kW

kWh

minute

second

79 A metal strain gauge has factor of two. Its nominal resistance is 120 omega .If it undergoes a strain of 10-5 the value of change of resistance in response to the strain is

240 ohm

2 x10-5 ohm

240 x 10-5 ohm

1.2 X 10-3 ohm

80 Megger is an instrument used for measurement of

low resistance

medium resistance

high resistance and insulation resistance

leakage current

81 In case of induction motor the ratio of core length to the pole pitch for good efficiency is taken as

1.0

1.5

2.0

5.0

82 "Pick-up" is another name for

Strain gauge

Synchros

Accelerometer

Transducer

83 For Simplex Lap winding the winding pitch is equal to

1

2

± 1

± 2

84 The rotor of squirrel cage induction machine designed with a high value of rotor current density results in

Low starting torque and lower efficiency

Low starting torque and higher efficiency

High starting torque and higher efficiency

High starting torque and lower efficiency

85 Percentage leakage reactance in a distribution transformer has to be

3to4%

4 to

1to2%

6to13%

86 The heat dissipating capability of oil immersed transformers of rating higher than 30 kVA is increased by providing

Fins, tubes, fans and radiator tank

Corrugations, fins, tubes, radiator tank

Auxiliary fins, water tubes and corrugations

Heat sinks, fins, tubes and corrugations

87 In a synchronous generator in order to eliminate the fifth harmonic the chording angle should be:

0°

18°

27°

36°

88 For a particular value of increasing the number of steps of the core of a transformer: max

Reduces the copper used in the transformer

Reduces the iron used in the transformer

Reduces the iron and increases the copper used in the transformer

Both and

89 Specific power (kWth/kg) of which reactor is the highest?

Pressurized water reactor

Boiling water reactor

Liquid metal fast breeder reactor

High temperature gas cooled reactor

90 Which type of following nuclear reactors has highest thermal efficiency?

Pressurized wateF reactor

Boiling water reactor

Sodium graphite reactor

Gas cooled reactor

91 Intercooling in gas turbines:

decreases net output but increases thermal efficiency

increases net output but decreases thermal efficiency

decreases both net output and thermal efficiency

increases both net output and thermal efficiency

92 Preheating of inlet water of a boiler by exhaust gas in steam plant is done in

Super heater

Economiser

Damper

Steam trap

93 Which of the following helps in stabilizing the velocity and pressure in the penstock in hydroelectric power plant

Draft tube

Forebay

Surge tank

Tail race

94 When a nuclear reactor is operating at constant power the multiplication factor is

less than unity

greater than unity

equal to unity

none of the above

95 The solar photovoltaic cell is prepared using semiconductor materials. Based on commonly used technology for solar cell manufacturing, consider following statements
is an indirect band gap semiconductor
is a direct band gap semiconductor
Direct band gap semiconductors require both photon and phonon particles where as indirect band gap semiconductor requires only photons for excitation
based solar PV cells are thicker than that of based solar PV cell

In above

All four statements are true

and are true but and are false

and are true but is false

All four statements are false

96 The rotor blades on a horizontal axis wind turbine rotate because of

drag

lift

wind speed

atmospheric pressure

97 Which one is the solar radiation measuring instrument?

Pyroheliometer

Thermoheliometer

Thermometer

Lux meter

98 Which type is the wind electric generator?

Synchronous generator

Induction generator

Doubly fed induction generator

Anyone of the above

99 In solar system, concentrator is the optical system that:

absorbs beam radiation into the receiver

converts beam energy into heat energy

directs beam radiation onto the receiver

reflects beam radiation away from the receiver

100 The optimum rotational frequency of a turbine in a particular wind speed decreases with:

decrease in radius of turbine

increase in height of turbine

increase in radius of turbine

decrease in circumference of turbine blade