BASIC ENGINEERING -PAGE 1
BASIC ENGINEERING MCQs- PAGE 1
1:-The temperature strain in a steel rod is ____________ proportional to the change in temperature.
A:-Directly
B:-Indirectly
C:-Either (1) or (2)
D:-Only depends on the material of the rod
Ans: A
2:-In measuring horizontal angles, the error due to imperfect levelling of the plate bubble is
A:-Large when sights are nearly level
B:-Large for long sights
C:-Less for steeply inclined sights
D:-Large for steeply inclined sights
Ans: D
3:-A cantilever 1.5m long carries a uniformly distributed load over the entire length. Find the deflection at the free end if the slope at the free end is `1.5^(@)`.
A:-34.5 mm
B:-15.6 mm
C:-29.5 mm
D:-None of these
Ans: C
4:-The heights of water on the upstream and downstream side of a submerged weir of 3m length are 20 cm and
10 cm respectively. If `C_(d)` for free and drowned portions are 0.6 and 0.8 respectively, find the discharge over the weir.
A:-`0.61 m^(3)//s`
B:-`0.48m^(3)//s`
C:-`0.058m^(3)//s`
D:-`0.51m^(3)//s`
Ans: D
5:-Activated sludge is
A:-Aerated sewage in the secondary tank containing aerobic microorganisms
B:-Aerated sludge in the aerated unit
C:-Sludge settled in the humus tank
D:-Aerated sewage in the secondary tank containing nutrients
Ans: A
6:-The maximum area of tension reinforcement in a beam having cross sectional area as `bd `shall not exceed
A:-0.02 bd
B:-0.03 bd
C:-0.04 bd
D:-0.05 bd
Ans: C
7:-A circular rod 0.2m long tapers from 20mm diameter at one end to 10mm diameter at the other. On applying an axial pull of 6kN, it was found to extend by 0.068mm. Find the Young's modulus of the material of the rod.
A:-`126 GN//m^(2)`
B:-`106 GN//m^(2)`
C:-`98 GN//m^(2)`
D:-`112GN//m^(2)`
Ans: D
8:-In establishing the line of sight which of the following statement is not correct ?
A:-Eyepiece optical centre is needed
B:-Optical centre of the objective is needed
C:-Diaphragm containing cross hairs is needed
D:-None of these
Ans: A
9:-Equation of flexure is given as
A:-`(M)/(I)=(sigma)/(y)=(E)/(R)`
B:-`(I)/(M)=(sigma)/(y)=(E)/(R)`
C:-`(M)/(I)=(y)/(sigma)=(E)/(R)`
D:-`(M)/(I)=(sigma)/(y)=(R)/(E)`
Ans: A
10:-A cut in the frame of a door to receive the shutter, is called
A:-Groove
B:-Rebate
C:-Horn
D:-Louver
Ans: B
11:-Lap length in compression reinforcement should not be less than ____________ tiimes the diameter of the bar.
A:-16
B:-20
C:-24
D:-30
Ans: C
12:-Moment of inertia of a quadrant circle of radius R about its XX axis is given by
A:-`0.11` `xx` `R^(4)`
B:-`0.055` `xx` `R^(4)`
C:-`0.011` `xx` `R^(4)`
D:-`0.55` `xx` `R^(4)`
Ans: B
13:-The point of contra-flexure is also called as
A:-Point of inflexion
B:-A virtual hinge
C:-Both (1) and (2)
D:-None of these
Ans: A
14:-Pitot tube is used to measure
A:-Discharge
B:-Pressure at a point
C:-Velocity at a point
D:-None of these
Ans: C
15:-Between Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand (COD).
A:-BOD should always measure higher than COD
B:-COD should always measure higher than BOD
C:-COD should always be equal to BOD
D:-Depends on the type of sewage
Ans: B
16:-Queen closer may be placed
A:-in header course
B:-in stretcher course
C:-in header course next to first brick
D:-in stretcher course next to first brick
Ans: C
17:-Half life for a general `n^(th)` order reaction is
A:-`(0.5^(n-1)-1)/(k(n-1)` `C_(AO)^(1-n)`
B:-`(0.5^(1-n)-1)/(k(n-1))` `C_(AO)^(1-n)`
C:-`(0.5^(1-n)-1)/(k(1-n))` `C_(AO)^(1-n)`
D:-`(0.5^(1-n)-1)/(k(n-1))` `C_(AO)^(n-1)`
Ans: B
18:-After 8 minutes in a batch reactor, `C_(AO) = 1mol//l` and conversion is 80%. After 18 minutes, the conversion is 90%. Then the rate equation is
A:-`-r_(A) = 0.5 ``C_(A)^(2)`
B:-`-r_(A)=0.25` `C_(A)^`
C:-`-r_(A) = 0.25` `C_(A)^(2)`
D:-`-r_(A) = 0.5` `C_(A)^`
Ans: A
19:-Initial setting time `(T_(1))` and final setting time `(T_(2))` for ordinary Portland Cement is given by the relation
A:-`T_(2) = 90 + 2.4 T_(1)`
B:-`T_(2) = 90 - 2.4 T_(1)`
C:-`T_(2) = 90 + 1.2 T_(1)`
D:-`T_(2) = 90 - 1.2 T_(1)`
Ans: C
20:-Loading effect is principally caused by ____________ instruments.
A:-high resistance
B:-low sensitivity
C:-high sensitivity
D:-high range
Ans: B
A:-Directly
B:-Indirectly
C:-Either (1) or (2)
D:-Only depends on the material of the rod
Ans: A
2:-In measuring horizontal angles, the error due to imperfect levelling of the plate bubble is
A:-Large when sights are nearly level
B:-Large for long sights
C:-Less for steeply inclined sights
D:-Large for steeply inclined sights
Ans: D
3:-A cantilever 1.5m long carries a uniformly distributed load over the entire length. Find the deflection at the free end if the slope at the free end is `1.5^(@)`.
A:-34.5 mm
B:-15.6 mm
C:-29.5 mm
D:-None of these
Ans: C
4:-The heights of water on the upstream and downstream side of a submerged weir of 3m length are 20 cm and
10 cm respectively. If `C_(d)` for free and drowned portions are 0.6 and 0.8 respectively, find the discharge over the weir.
A:-`0.61 m^(3)//s`
B:-`0.48m^(3)//s`
C:-`0.058m^(3)//s`
D:-`0.51m^(3)//s`
Ans: D
5:-Activated sludge is
A:-Aerated sewage in the secondary tank containing aerobic microorganisms
B:-Aerated sludge in the aerated unit
C:-Sludge settled in the humus tank
D:-Aerated sewage in the secondary tank containing nutrients
Ans: A
6:-The maximum area of tension reinforcement in a beam having cross sectional area as `bd `shall not exceed
A:-0.02 bd
B:-0.03 bd
C:-0.04 bd
D:-0.05 bd
Ans: C
7:-A circular rod 0.2m long tapers from 20mm diameter at one end to 10mm diameter at the other. On applying an axial pull of 6kN, it was found to extend by 0.068mm. Find the Young's modulus of the material of the rod.
A:-`126 GN//m^(2)`
B:-`106 GN//m^(2)`
C:-`98 GN//m^(2)`
D:-`112GN//m^(2)`
Ans: D
8:-In establishing the line of sight which of the following statement is not correct ?
A:-Eyepiece optical centre is needed
B:-Optical centre of the objective is needed
C:-Diaphragm containing cross hairs is needed
D:-None of these
Ans: A
9:-Equation of flexure is given as
A:-`(M)/(I)=(sigma)/(y)=(E)/(R)`
B:-`(I)/(M)=(sigma)/(y)=(E)/(R)`
C:-`(M)/(I)=(y)/(sigma)=(E)/(R)`
D:-`(M)/(I)=(sigma)/(y)=(R)/(E)`
Ans: A
10:-A cut in the frame of a door to receive the shutter, is called
A:-Groove
B:-Rebate
C:-Horn
D:-Louver
Ans: B
11:-Lap length in compression reinforcement should not be less than ____________ tiimes the diameter of the bar.
A:-16
B:-20
C:-24
D:-30
Ans: C
12:-Moment of inertia of a quadrant circle of radius R about its XX axis is given by
A:-`0.11` `xx` `R^(4)`
B:-`0.055` `xx` `R^(4)`
C:-`0.011` `xx` `R^(4)`
D:-`0.55` `xx` `R^(4)`
Ans: B
13:-The point of contra-flexure is also called as
A:-Point of inflexion
B:-A virtual hinge
C:-Both (1) and (2)
D:-None of these
Ans: A
14:-Pitot tube is used to measure
A:-Discharge
B:-Pressure at a point
C:-Velocity at a point
D:-None of these
Ans: C
15:-Between Biochemical Oxygen Demand (BOD) and Chemical Oxygen Demand (COD).
A:-BOD should always measure higher than COD
B:-COD should always measure higher than BOD
C:-COD should always be equal to BOD
D:-Depends on the type of sewage
Ans: B
16:-Queen closer may be placed
A:-in header course
B:-in stretcher course
C:-in header course next to first brick
D:-in stretcher course next to first brick
Ans: C
17:-Half life for a general `n^(th)` order reaction is
A:-`(0.5^(n-1)-1)/(k(n-1)` `C_(AO)^(1-n)`
B:-`(0.5^(1-n)-1)/(k(n-1))` `C_(AO)^(1-n)`
C:-`(0.5^(1-n)-1)/(k(1-n))` `C_(AO)^(1-n)`
D:-`(0.5^(1-n)-1)/(k(n-1))` `C_(AO)^(n-1)`
Ans: B
18:-After 8 minutes in a batch reactor, `C_(AO) = 1mol//l` and conversion is 80%. After 18 minutes, the conversion is 90%. Then the rate equation is
A:-`-r_(A) = 0.5 ``C_(A)^(2)`
B:-`-r_(A)=0.25` `C_(A)^`
C:-`-r_(A) = 0.25` `C_(A)^(2)`
D:-`-r_(A) = 0.5` `C_(A)^`
Ans: A
19:-Initial setting time `(T_(1))` and final setting time `(T_(2))` for ordinary Portland Cement is given by the relation
A:-`T_(2) = 90 + 2.4 T_(1)`
B:-`T_(2) = 90 - 2.4 T_(1)`
C:-`T_(2) = 90 + 1.2 T_(1)`
D:-`T_(2) = 90 - 1.2 T_(1)`
Ans: C
20:-Loading effect is principally caused by ____________ instruments.
A:-high resistance
B:-low sensitivity
C:-high sensitivity
D:-high range
Ans: B
21:-A reversible heat engine receives 300 kJ from a heat source, delivers 100 kJ of work and rejects the balance heat to a sink. If the sink is at `30^(@)C`, determine the temperature of the heat source
A:-`45.55^(@)C`
B:-`181.55^(@)C`
C:-`171.55^(@)C`
D:-`161.55^(@)C`
Ans: B
22:-For the same compression ratio
A:-Thermal efficiency of Otto cycle is greater than that of Diesel cycle
B:-Thermal efficiency of Otto cycle is less than that of Diesel cycle
C:-Thermal efficiency of Otto cycle is same as that of Diesel cycle
D:-Thermal efficiency of Otto cycle cannot be predicted
Ans: A
23:-In Aqua-Ammonia and Li-Br water absorption refrigeration systems, the refrigerants are respectively.
A:-Water and water
B:-Water and Li-Br
C:-Ammonia and Li-Br
D:-Ammonia and water
Ans: D
24:-An apartment has a cooling load of 300 MJ/day. An air conditioner working 24 hours a day will have an approximate capacity of
A:-5TR
B:-2TR
C:-1TR
D:-7.5TR
Ans: C
25:-A pelton wheel is ideally suitable for
A:-High head and high discharge
B:-Low head and low discharge
C:-High head and low discharge
D:-Medium head and medium discharge
Ans: C
26:-A fluid jet of cross sectional area A and velocity V and density ρ strikes a flat plate moving with a velocity u. The fluid mass striking it per second is
A:-ρAV
B:-ρA(V+u)
C:-ρA(u−V)
D:-ρA(V−u)
Ans: D
27:-The radial heat transfer rate through hollow cylinder increases as the ratio of outer radius to inner radius
A:-Decreases
B:-Increases
C:-Constant
D:-None of the above
Ans: A
28:-The unit of coefficient of convective heat transfer 'h' is expressed as
A:-W/mK
B:-W/m²K
C:-W/hmK
D:-W/h²m²K
Ans: B
29:-An increase in the percentage of carbon in steel results into decrease in its
A:-Hardness
B:-Corrosion resistance
C:-Ultimate strength
D:-Ductility
Ans: D
30:-Dislocation in materials is a _________ defect.
A:-Point
B:-Line
C:-Plane
D:-Volumetric
Ans: B
31:-For transmission of maximum power the maximum tension in the belt should be
A:-Equal to centrifugal tension
B:-Two times the centrifugal tension
C:-Three times the centrifugal tension
D:-Four times the centrifugal tension
Ans: C
32:-A worm gearing is used to obtain speed reduction between shafts whose axes are
A:-Perpendicular and do not intersect
B:-Inclined
C:-Parallel
D:-Perpendicular and intersect
Ans: A
33:-A 50mm diameter rod is to be turned on a lathe at a cutting speed of 30m/minute. The required spindle speed in rpm should be approximately.
A:-160
B:-170
C:-180
D:-190
Ans: D
34:-The angle between the face and flank of the single point cutting tool is known as
A:-Rake angle
B:-Clearance angle
C:-Lip angle
D:-Point angle
Ans: B
35:-The swaying couple in locomotives has maximum or minimum value when the angle of inclination of crank with the line of stroke.
A:-`30^(@)`
B:-`45^(@)`
C:-`60^(@)`
D:-`90^(@)`
Ans: B
36:-At a particular rotational speed the unbalanced force due to revolving mass
A:-varies both in magnitude and direction
B:-is constant in magnitude as well as direction
C:-varies in magnitude but is constant in direction
D:-is constant in magnitude but varies in direction
Ans: D
37:-The static deflection of a shaft under a fly wheel is 1mm. What is the critical speed in rad/s if `g=10m//s^(2)`
A:-100
B:-200
C:-50
D:-75
Ans: A
38:-For a shaft fixed at one end and carrying a rotor at the free end the nodal point will lie at
A:-free end
B:-the mid length of the shaft
C:-the fixed end
D:-`2//3^(rd)` of distance from the free end
Ans: C
39:-For a small change of speed, if the displacement of the sleeve is high, then the governor
A:-Hunting
B:-Isochronous
C:-Sensitive
D:-Stable
Ans: C
40:-Dryness fraction is the ratio of
A:-Mass of dry steam to the mass of water vapour in suspension
B:-Mass of water vapour in suspension to the mass of water vapour and mass of dry steam
C:-Mass of dry steam to the mass of dry steam and mass of water vapour in suspension
D:-Mass of water vapour in suspension to the mass of dry steam
Ans: C
41:-The function of a steam trap is
A:-To stop water particles going along with steam
B:-To drain off water resulting from partial condensation of steam pipes
C:-To prevent steam leaking out from the boiler
D:-To regulate the steam flow rate from the boiler
Ans: B
42:-For a thin cylinder subjected to internal pressure the ratio of circumferential and longitudinal stresses are in the ratio
A:-2 : 1
B:-3 : 2
C:-1 : 1
D:-1 : 2
Ans: A
43:-In a gas turbine the function of regenerator is
A:-Heating the compressed air on its way to combustion chamber
B:-Heating the fuel supplied to combustion chamber
C:-Heating the gases leaving the combustion chamber
D:-Heating the turbine exhaust before it enters the low pressure stage
Ans: A
44:-The air screw of an airplane is rotating clockwise when looking from the front. If it makes a left turn the gyroscopic effect will be
A:-Tend to depress the nose and raise the tail
B:-Tend to raise the nose and depress the trail
C:-Tilt the aeroplane
D:-None of the above
Ans: B
45:-For forced convection Nusselt number is a function of
A:-Prandtl and Grashoff number
B:-Reynolds Mach number
C:-Reynolds and Grashoff number
D:-Reynolds and Prandtl number
Ans: D
46:-If the mean velocity of water is V, R be hydraulic mean depth, ρ and μ be density and viscosity of water then Reynold number `(R_(e))` is defined as
A:-`V/sqrt(gR)`
B:-`(rhoR)/(muV`
C:-`(rhoVR)/mu`
D:-None of these
Ans: C
47:-Find the area of rapid sand filters required for a town having a population of 80000 with an average rate of demand as 200 litres per head per day. Assume a rate of filtration as 5000 litres per hour per `m^(2)` of filter area.
A:-`300m^(2)`
B:-`200m^(2)`
C:-`100m^(2)`
D:-`400m^(2)`
Ans: B
48:-Two plates of 16 mm and 14 mm are joined by fillet. What should be the size of fillet weld to be used ?
A:-12.5
B:-2.0
C:-17.5
D:-10.5
Ans: A
49:-The relation between modulus of Elasticity (E) and modulus of rigidity (N) and bulk modulus (K) is given by the relation
A:-`E = (3KN)/(9K-N)`
B:-`E=(3KN)/(9K+N)`
C:-`E=(9KN)/(3K-N)`
D:-`E=(9KN)/(3K+N)`
Ans: D
50:-Due to negative skin friction on a pile, the load carrying capacity of the pile
A:-Remains same
B:-Decreases
C:-Increases
D:-None of these
Ans: B
51:-Find the discharge through a rectangular channel of width 2m, having a bed slope of 4 in 8000. The depth of flow is 1.5 m and take the value of N in Manning's formula as 0.012
A:-`3.98 m^(3)//s`
B:-`4.67 m^(3)//s`
C:-`2.76 m^(3)//s`
D:-`8.26 m^(2)//s`
Ans: A
52:-Most weather phenomena occur in the
A:-Thermosphere
B:-Mesosphere
C:-Stratosphere
D:-Troposphere
Ans: D
53:-The diameter of a rivet connecting plate of thickness 15 mm given by Unwin's formula is
A:-26 mm
B:-22 mm
C:-24 mm
D:-20 mm
Ans: C
54:-Elongation produced in a bar of density ρ, length `l` and Young's modulus E due to its self-weight
A:-`(9.81rhol^(2))/(2E)`
B:-`(9.81rhol^(2))/(E)`
C:-`(9.81rhol^(2))/(2N)`
D:-`(9.81rho^(2)l)/(2E)`
Ans: A
55:-N value for medium sand lies between
A:-10 to 30
B:-5 to 10
C:-30 to 50
D:-0 to 5
Ans: A
56:-Beams of uniform strength can be made by varying the cross sectional dimension in such a way that
A:-`Sigma/y` is constant
B:-`M/z` is constant
C:-`E/R` is constant
D:-Section modulus (z) is constant
Ans: B
57:-The minimum specific energy `(E_(min)) `is related to critical depth `(h_(c))` for open channel flow as ``
A:-`E_(min) =(3)/(2)h_(c)`
B:-`E_(min) =(5)/(2)h_(c)`
C:-`h_(c)=(3)/(2)E_(min)`
D:-`h_(c)=(5)/(2)E_(min)`
Ans: A
58:-The relation between porosity (n) specific yield `(S_(y))` and specific retention `(S_(r))` is correctly given in the relationship. ` `
A:-`n = S_(y)-S_(r)`
B:-`n = S_(y) + S_(r)`
C:-`S_(r) = S_(y) - n`
D:-`S_(r) = S_(y) + n`
Ans: B
A:-`45.55^(@)C`
B:-`181.55^(@)C`
C:-`171.55^(@)C`
D:-`161.55^(@)C`
Ans: B
22:-For the same compression ratio
A:-Thermal efficiency of Otto cycle is greater than that of Diesel cycle
B:-Thermal efficiency of Otto cycle is less than that of Diesel cycle
C:-Thermal efficiency of Otto cycle is same as that of Diesel cycle
D:-Thermal efficiency of Otto cycle cannot be predicted
Ans: A
23:-In Aqua-Ammonia and Li-Br water absorption refrigeration systems, the refrigerants are respectively.
A:-Water and water
B:-Water and Li-Br
C:-Ammonia and Li-Br
D:-Ammonia and water
Ans: D
24:-An apartment has a cooling load of 300 MJ/day. An air conditioner working 24 hours a day will have an approximate capacity of
A:-5TR
B:-2TR
C:-1TR
D:-7.5TR
Ans: C
25:-A pelton wheel is ideally suitable for
A:-High head and high discharge
B:-Low head and low discharge
C:-High head and low discharge
D:-Medium head and medium discharge
Ans: C
26:-A fluid jet of cross sectional area A and velocity V and density ρ strikes a flat plate moving with a velocity u. The fluid mass striking it per second is
A:-ρAV
B:-ρA(V+u)
C:-ρA(u−V)
D:-ρA(V−u)
Ans: D
27:-The radial heat transfer rate through hollow cylinder increases as the ratio of outer radius to inner radius
A:-Decreases
B:-Increases
C:-Constant
D:-None of the above
Ans: A
28:-The unit of coefficient of convective heat transfer 'h' is expressed as
A:-W/mK
B:-W/m²K
C:-W/hmK
D:-W/h²m²K
Ans: B
29:-An increase in the percentage of carbon in steel results into decrease in its
A:-Hardness
B:-Corrosion resistance
C:-Ultimate strength
D:-Ductility
Ans: D
30:-Dislocation in materials is a _________ defect.
A:-Point
B:-Line
C:-Plane
D:-Volumetric
Ans: B
31:-For transmission of maximum power the maximum tension in the belt should be
A:-Equal to centrifugal tension
B:-Two times the centrifugal tension
C:-Three times the centrifugal tension
D:-Four times the centrifugal tension
Ans: C
32:-A worm gearing is used to obtain speed reduction between shafts whose axes are
A:-Perpendicular and do not intersect
B:-Inclined
C:-Parallel
D:-Perpendicular and intersect
Ans: A
33:-A 50mm diameter rod is to be turned on a lathe at a cutting speed of 30m/minute. The required spindle speed in rpm should be approximately.
A:-160
B:-170
C:-180
D:-190
Ans: D
34:-The angle between the face and flank of the single point cutting tool is known as
A:-Rake angle
B:-Clearance angle
C:-Lip angle
D:-Point angle
Ans: B
35:-The swaying couple in locomotives has maximum or minimum value when the angle of inclination of crank with the line of stroke.
A:-`30^(@)`
B:-`45^(@)`
C:-`60^(@)`
D:-`90^(@)`
Ans: B
36:-At a particular rotational speed the unbalanced force due to revolving mass
A:-varies both in magnitude and direction
B:-is constant in magnitude as well as direction
C:-varies in magnitude but is constant in direction
D:-is constant in magnitude but varies in direction
Ans: D
37:-The static deflection of a shaft under a fly wheel is 1mm. What is the critical speed in rad/s if `g=10m//s^(2)`
A:-100
B:-200
C:-50
D:-75
Ans: A
38:-For a shaft fixed at one end and carrying a rotor at the free end the nodal point will lie at
A:-free end
B:-the mid length of the shaft
C:-the fixed end
D:-`2//3^(rd)` of distance from the free end
Ans: C
39:-For a small change of speed, if the displacement of the sleeve is high, then the governor
A:-Hunting
B:-Isochronous
C:-Sensitive
D:-Stable
Ans: C
40:-Dryness fraction is the ratio of
A:-Mass of dry steam to the mass of water vapour in suspension
B:-Mass of water vapour in suspension to the mass of water vapour and mass of dry steam
C:-Mass of dry steam to the mass of dry steam and mass of water vapour in suspension
D:-Mass of water vapour in suspension to the mass of dry steam
Ans: C
41:-The function of a steam trap is
A:-To stop water particles going along with steam
B:-To drain off water resulting from partial condensation of steam pipes
C:-To prevent steam leaking out from the boiler
D:-To regulate the steam flow rate from the boiler
Ans: B
42:-For a thin cylinder subjected to internal pressure the ratio of circumferential and longitudinal stresses are in the ratio
A:-2 : 1
B:-3 : 2
C:-1 : 1
D:-1 : 2
Ans: A
43:-In a gas turbine the function of regenerator is
A:-Heating the compressed air on its way to combustion chamber
B:-Heating the fuel supplied to combustion chamber
C:-Heating the gases leaving the combustion chamber
D:-Heating the turbine exhaust before it enters the low pressure stage
Ans: A
44:-The air screw of an airplane is rotating clockwise when looking from the front. If it makes a left turn the gyroscopic effect will be
A:-Tend to depress the nose and raise the tail
B:-Tend to raise the nose and depress the trail
C:-Tilt the aeroplane
D:-None of the above
Ans: B
45:-For forced convection Nusselt number is a function of
A:-Prandtl and Grashoff number
B:-Reynolds Mach number
C:-Reynolds and Grashoff number
D:-Reynolds and Prandtl number
Ans: D
46:-If the mean velocity of water is V, R be hydraulic mean depth, ρ and μ be density and viscosity of water then Reynold number `(R_(e))` is defined as
A:-`V/sqrt(gR)`
B:-`(rhoR)/(muV`
C:-`(rhoVR)/mu`
D:-None of these
Ans: C
47:-Find the area of rapid sand filters required for a town having a population of 80000 with an average rate of demand as 200 litres per head per day. Assume a rate of filtration as 5000 litres per hour per `m^(2)` of filter area.
A:-`300m^(2)`
B:-`200m^(2)`
C:-`100m^(2)`
D:-`400m^(2)`
Ans: B
48:-Two plates of 16 mm and 14 mm are joined by fillet. What should be the size of fillet weld to be used ?
A:-12.5
B:-2.0
C:-17.5
D:-10.5
Ans: A
49:-The relation between modulus of Elasticity (E) and modulus of rigidity (N) and bulk modulus (K) is given by the relation
A:-`E = (3KN)/(9K-N)`
B:-`E=(3KN)/(9K+N)`
C:-`E=(9KN)/(3K-N)`
D:-`E=(9KN)/(3K+N)`
Ans: D
50:-Due to negative skin friction on a pile, the load carrying capacity of the pile
A:-Remains same
B:-Decreases
C:-Increases
D:-None of these
Ans: B
51:-Find the discharge through a rectangular channel of width 2m, having a bed slope of 4 in 8000. The depth of flow is 1.5 m and take the value of N in Manning's formula as 0.012
A:-`3.98 m^(3)//s`
B:-`4.67 m^(3)//s`
C:-`2.76 m^(3)//s`
D:-`8.26 m^(2)//s`
Ans: A
52:-Most weather phenomena occur in the
A:-Thermosphere
B:-Mesosphere
C:-Stratosphere
D:-Troposphere
Ans: D
53:-The diameter of a rivet connecting plate of thickness 15 mm given by Unwin's formula is
A:-26 mm
B:-22 mm
C:-24 mm
D:-20 mm
Ans: C
54:-Elongation produced in a bar of density ρ, length `l` and Young's modulus E due to its self-weight
A:-`(9.81rhol^(2))/(2E)`
B:-`(9.81rhol^(2))/(E)`
C:-`(9.81rhol^(2))/(2N)`
D:-`(9.81rho^(2)l)/(2E)`
Ans: A
55:-N value for medium sand lies between
A:-10 to 30
B:-5 to 10
C:-30 to 50
D:-0 to 5
Ans: A
56:-Beams of uniform strength can be made by varying the cross sectional dimension in such a way that
A:-`Sigma/y` is constant
B:-`M/z` is constant
C:-`E/R` is constant
D:-Section modulus (z) is constant
Ans: B
57:-The minimum specific energy `(E_(min)) `is related to critical depth `(h_(c))` for open channel flow as ``
A:-`E_(min) =(3)/(2)h_(c)`
B:-`E_(min) =(5)/(2)h_(c)`
C:-`h_(c)=(3)/(2)E_(min)`
D:-`h_(c)=(5)/(2)E_(min)`
Ans: A
58:-The relation between porosity (n) specific yield `(S_(y))` and specific retention `(S_(r))` is correctly given in the relationship. ` `
A:-`n = S_(y)-S_(r)`
B:-`n = S_(y) + S_(r)`
C:-`S_(r) = S_(y) - n`
D:-`S_(r) = S_(y) + n`
Ans: B
59:-Which of the following devices has the highest input impedance?
A:-JFET
B:-Ordinary transistor
C:-Crystal diode
D:-MOSFET
Ans: D
60:-An SCR is turned off when
A:-Anode current is reduced to zero
B:-Gate voltage is reduced to zero
C:-Gate is reverse biased
D:-None of the above
Ans: A
61:-A diac is ___________ switch.
A:-AC
B:-DC
C:-Mechanical
D:-None of the above
Ans: A
62:-A UJT may be used as
A:-Amplifier
B:-Saw tooth generator
C:-Rectifier
D:-None of the above
Ans: B
63:-The horizontal plates of a CRO are supplied with ____________ to observe the waveform of a signal.
A:-Sinusoidal wave
B:-Cosine wave
C:-Sawtooth wave
D:-None of the above
Ans: C
64:-The modulus of a counter is
A:-The number of flipflops
B:-The actual number of states in its sequence
C:-The number of times it recycles in a sec
D:-The maximum no of states
Ans: B
65:-The digital circuit that routes its single input signal to one of `2^n` output lines depending on the value of `n` control lines is
A:-multiplexer
B:-demultiplexer
C:-encoder
D:-data selector
Ans: B
66:-A full adder can be made up of
A:-two half adders
B:-two half adders and a NOT gate
C:-two half adders and a OR gate
D:-two half adders and a AND gate
Ans: C
67:-Which of the following is called the Universal Bias?
A:-Emitter bias
B:-Voltage divider bias
C:-Base bias
D:-None of the above
Ans: B
68:-The advantage of transistor over Vacuum tube is
A:-Very small size
B:-Minimum power loss in the form of heal
C:-Low operating voltage
D:-All of the above
Ans: D
69:-Which of the following should be as high as possible?
A:-signal to noise ratio
B:-hysteresis
C:-range
D:-frequency response
Ans: A
70:-The degree to which variation in the output of an instrument follow input variations is referred to as
A:-sensitivity
B:-linearity
C:-hysteresis
D:-accuracy
Ans: B
71:-The 8051 microcontroller is of ____________ pin package as a _____________ processor.
A:-30, 1 byte
B:-20, 1 byte
C:-40, 8 bit
D:-40, 8 byte
Ans: C
72:-In induction heating depth of penetration is proportional to
A:-`"sqrt {frequency}"`
B:-`1/ "sqrt {frequency}"`
C:-frequency
D:-`"(frequency)^2"`
Ans: B
73:-The ON state voltage drop across IGBT is
A:-Less than that across MOSFET
B:-Greater than that across MOSFET
C:-Equal to that of MOSFET
D:-None of the above
Ans: A
74:-Which BUS is bi-directional?
A:-Data bus
B:-Control bus
C:-Address bus
D:-Multiplexed bus
Ans: A
75:-The composition of soft solder is
A:-Lead 37% - Tin 63%
B:-Lead 50% - Tin 50%
C:-Lead 63% - Tin 37%
D:-Lead 70% - Tin 30%
Ans: A
76:-Which digital IC package type makes the most efficient use of printed circuit board space?
A:-SMT
B:-TO can
C:-Flat-pack
D:-DIP
Ans: A
77:-Which of the following can be act as Shear Protector
A:-Serum
B:-Silicon oil
C:-Glucose
D:-Glutamic acid
Ans: A
78:-Non linear relationship between shear stress and shear rate exist in
A:-Newtonian fluids
B:-Non Newtonian fluids
C:-Both (1) and (2)
D:-None of these
Ans: B
79:-The mechanical means of accomplishing sterilization of fermentation media/equipment is
A:-ultrasonic
B:-radiation
C:-chemical agents
D:-none of these
Ans: A
80:-The collection efficiency by diffusion increases with
A:-Decreasing particle size
B:-Decreasing air velocity
C:-Both (1) and (2)
D:-Increasing particle size
Ans: C
81:-IN ERG measurements the reference electrode is made from
A:-Carbon
B:-Silver
C:-Carbon chloride
D:-Silver chloride
Ans: D
82:-The advantage of star connected supply system is that
A:-Line current is equal to phase current
B:-Two voltages can be used
C:-Phase sequence can be easily changed
D:-It is a simple arrangement
Ans: B
83:-Internet works on
A:-Packet switching
B:-Circuit switching
C:-Both (1) and (2)
D:-None
Ans: C
84:-A circuit breaker is a
A:-power factor correcting device
B:-wave form correcting device
C:-both (1) and (2)
D:-current interrupting device
Ans: D
85:-For communication from one network to another ____________ device is used
A:-gate way
B:-utility server
C:-printer server
D:-file server
Ans: A
86:-Coaxial cable consists of ____________ concentric copper conductors.
A:-1
B:-2
C:-3
D:-4
Ans: B
A:-JFET
B:-Ordinary transistor
C:-Crystal diode
D:-MOSFET
Ans: D
60:-An SCR is turned off when
A:-Anode current is reduced to zero
B:-Gate voltage is reduced to zero
C:-Gate is reverse biased
D:-None of the above
Ans: A
61:-A diac is ___________ switch.
A:-AC
B:-DC
C:-Mechanical
D:-None of the above
Ans: A
62:-A UJT may be used as
A:-Amplifier
B:-Saw tooth generator
C:-Rectifier
D:-None of the above
Ans: B
63:-The horizontal plates of a CRO are supplied with ____________ to observe the waveform of a signal.
A:-Sinusoidal wave
B:-Cosine wave
C:-Sawtooth wave
D:-None of the above
Ans: C
64:-The modulus of a counter is
A:-The number of flipflops
B:-The actual number of states in its sequence
C:-The number of times it recycles in a sec
D:-The maximum no of states
Ans: B
65:-The digital circuit that routes its single input signal to one of `2^n` output lines depending on the value of `n` control lines is
A:-multiplexer
B:-demultiplexer
C:-encoder
D:-data selector
Ans: B
66:-A full adder can be made up of
A:-two half adders
B:-two half adders and a NOT gate
C:-two half adders and a OR gate
D:-two half adders and a AND gate
Ans: C
67:-Which of the following is called the Universal Bias?
A:-Emitter bias
B:-Voltage divider bias
C:-Base bias
D:-None of the above
Ans: B
68:-The advantage of transistor over Vacuum tube is
A:-Very small size
B:-Minimum power loss in the form of heal
C:-Low operating voltage
D:-All of the above
Ans: D
69:-Which of the following should be as high as possible?
A:-signal to noise ratio
B:-hysteresis
C:-range
D:-frequency response
Ans: A
70:-The degree to which variation in the output of an instrument follow input variations is referred to as
A:-sensitivity
B:-linearity
C:-hysteresis
D:-accuracy
Ans: B
71:-The 8051 microcontroller is of ____________ pin package as a _____________ processor.
A:-30, 1 byte
B:-20, 1 byte
C:-40, 8 bit
D:-40, 8 byte
Ans: C
72:-In induction heating depth of penetration is proportional to
A:-`"sqrt {frequency}"`
B:-`1/ "sqrt {frequency}"`
C:-frequency
D:-`"(frequency)^2"`
Ans: B
73:-The ON state voltage drop across IGBT is
A:-Less than that across MOSFET
B:-Greater than that across MOSFET
C:-Equal to that of MOSFET
D:-None of the above
Ans: A
74:-Which BUS is bi-directional?
A:-Data bus
B:-Control bus
C:-Address bus
D:-Multiplexed bus
Ans: A
75:-The composition of soft solder is
A:-Lead 37% - Tin 63%
B:-Lead 50% - Tin 50%
C:-Lead 63% - Tin 37%
D:-Lead 70% - Tin 30%
Ans: A
76:-Which digital IC package type makes the most efficient use of printed circuit board space?
A:-SMT
B:-TO can
C:-Flat-pack
D:-DIP
Ans: A
77:-Which of the following can be act as Shear Protector
A:-Serum
B:-Silicon oil
C:-Glucose
D:-Glutamic acid
Ans: A
78:-Non linear relationship between shear stress and shear rate exist in
A:-Newtonian fluids
B:-Non Newtonian fluids
C:-Both (1) and (2)
D:-None of these
Ans: B
79:-The mechanical means of accomplishing sterilization of fermentation media/equipment is
A:-ultrasonic
B:-radiation
C:-chemical agents
D:-none of these
Ans: A
80:-The collection efficiency by diffusion increases with
A:-Decreasing particle size
B:-Decreasing air velocity
C:-Both (1) and (2)
D:-Increasing particle size
Ans: C
81:-IN ERG measurements the reference electrode is made from
A:-Carbon
B:-Silver
C:-Carbon chloride
D:-Silver chloride
Ans: D
82:-The advantage of star connected supply system is that
A:-Line current is equal to phase current
B:-Two voltages can be used
C:-Phase sequence can be easily changed
D:-It is a simple arrangement
Ans: B
83:-Internet works on
A:-Packet switching
B:-Circuit switching
C:-Both (1) and (2)
D:-None
Ans: C
84:-A circuit breaker is a
A:-power factor correcting device
B:-wave form correcting device
C:-both (1) and (2)
D:-current interrupting device
Ans: D
85:-For communication from one network to another ____________ device is used
A:-gate way
B:-utility server
C:-printer server
D:-file server
Ans: A
86:-Coaxial cable consists of ____________ concentric copper conductors.
A:-1
B:-2
C:-3
D:-4
Ans: B
87:-For IC 7815 the minimum unregulated DC input voltage should be
A:-+15 V
B:-+17 V
C:-+19 V
D:-+13 V
Ans: B
88:-Two identical transistors having a β of 50 each, are connected as Darlington pair, the current gain β of the amplifier is
A:-100
B:-1
C:-2500
D:-500
Ans: C
89:-Effect of the emitter by pass capacitor in a CE Amplifier is
A:-Gain
B:-Input impedance
C:-Output impedance
D:-Both (1) and (2)
Ans: D
90:-Which of the following is the most preferred type of biasing?
A:-Emitter bias
B:-Voltage divider bias
C:-Base bias
D:-Both (1) and (3)
Ans: B
91:-A good power supply should have load regulation not more than
A:-0.10%
B:-1%
C:-5%
D:-10%
Ans: A
92:-The phenomenon which causes reverse breakdown in Zener Diode is known as
A:-Hall effect
B:-Break down effect
C:-Avalanche effect
D:-Induction effect
Ans: C
93:-The RMS voltage at the transformer secondary is 6 V. Its Peak Value is
A:-9.6 V
B:-7.2 V
C:-8.5 V
D:-12 V
Ans: C
94:-When a diode is tested using an Ohm meter, it indicates high resistance in both direction, the condition of the diode is
A:-Open
B:-Short
C:-Leaky
D:-Good
Ans: A
95:-Which of the following is a polarised capacitor?
A:-Paper Capacitor
B:-Plastic Film Capacitor
C:-Ceramic Capacitor
D:-Tandalum Electrolytic Capacitor
Ans: D
96:-If `m` and `n` are the modulus of any counters, then overall modulus of the cascaded counters is given by
A:-`mn`
B:-`2^(mn)`
C:-`mn^2`
D:-`(m/n)^2`
Ans: A
97:-IC 7476 is
A:-D FlipFlop
B:-RS FlipFlop
C:-JK FlipFlop
D:-MS FlipFlop
Ans: C
98:-The output of a particular OP-Amp increases 8 V in 12 ms, the slew rate is
A:-90 V/ms
B:-1 V/ms
C:-1.5 V/ms
D:-0.67 V/ms
Ans: D
99:-A Binary number 10101 is equivalent to decimal number
A:-19
B:-12
C:-27
D:-21
Ans: D
100:-The number `(12)_8` is equivalent to decimal
A:-12
B:-20
C:-10
D:-4
Ans: C
A:-+15 V
B:-+17 V
C:-+19 V
D:-+13 V
Ans: B
88:-Two identical transistors having a β of 50 each, are connected as Darlington pair, the current gain β of the amplifier is
A:-100
B:-1
C:-2500
D:-500
Ans: C
89:-Effect of the emitter by pass capacitor in a CE Amplifier is
A:-Gain
B:-Input impedance
C:-Output impedance
D:-Both (1) and (2)
Ans: D
90:-Which of the following is the most preferred type of biasing?
A:-Emitter bias
B:-Voltage divider bias
C:-Base bias
D:-Both (1) and (3)
Ans: B
91:-A good power supply should have load regulation not more than
A:-0.10%
B:-1%
C:-5%
D:-10%
Ans: A
92:-The phenomenon which causes reverse breakdown in Zener Diode is known as
A:-Hall effect
B:-Break down effect
C:-Avalanche effect
D:-Induction effect
Ans: C
93:-The RMS voltage at the transformer secondary is 6 V. Its Peak Value is
A:-9.6 V
B:-7.2 V
C:-8.5 V
D:-12 V
Ans: C
94:-When a diode is tested using an Ohm meter, it indicates high resistance in both direction, the condition of the diode is
A:-Open
B:-Short
C:-Leaky
D:-Good
Ans: A
95:-Which of the following is a polarised capacitor?
A:-Paper Capacitor
B:-Plastic Film Capacitor
C:-Ceramic Capacitor
D:-Tandalum Electrolytic Capacitor
Ans: D
96:-If `m` and `n` are the modulus of any counters, then overall modulus of the cascaded counters is given by
A:-`mn`
B:-`2^(mn)`
C:-`mn^2`
D:-`(m/n)^2`
Ans: A
97:-IC 7476 is
A:-D FlipFlop
B:-RS FlipFlop
C:-JK FlipFlop
D:-MS FlipFlop
Ans: C
98:-The output of a particular OP-Amp increases 8 V in 12 ms, the slew rate is
A:-90 V/ms
B:-1 V/ms
C:-1.5 V/ms
D:-0.67 V/ms
Ans: D
99:-A Binary number 10101 is equivalent to decimal number
A:-19
B:-12
C:-27
D:-21
Ans: D
100:-The number `(12)_8` is equivalent to decimal
A:-12
B:-20
C:-10
D:-4
Ans: C