If the load p.f. is 0.866, then the average p.f. the v-bank is 0.75
Description : The two watt meters measurement the ratio of two meter readings is –(1-sqrt3):( 1+sqrt3) then the power factor is a) 1 b) 0.866 c) 0.707 d) 0
Last Answer : Ans: 0.707
Description : In conversion of 3-phase to 2-phase supply with T connection, the transformation ratio of the teaser will be__ times to that of main transformer: a) 1.732 b) 1.15 c) 0.866 d) Unity
Last Answer : Ans: C
Description : Find the ratio of refractive index of medium 2 to that of medium 1, when the Brewster angle is 60 degree. a) 0.707 b) 1.5 c) 0.866 d) 1.732
Last Answer : d) 1.732
Description : A 220 V dc machine has an armature resistance o f 1-ohm. If the full load current is 20A, the difference in the induced voltage when the machine is running as a motor, and as a generator is
Last Answer : A 220 V dc machine has an armature resistance o f 1-ohm. If the full load current is 20A, the difference in the induced voltage when the machine is running as a motor, and as a generator is 40 V.
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Description : What should be kVA rating of each transformer in V-V bank when three phase balanced load is 40 kVA ? (A) 19 (B) 28 (C) 37 (D) 23
Last Answer : What should be kVA rating of each transformer in V-V bank when three phase balanced load is 40 kVA ? (A) 19 (B) 28 (C) 37 (D) 23
Description : An adsorption isotherm equation proposed by Langmuir is of the form `V = (V_(0)bPO)/((1 + bP))` where V is the volume of gas adsorbed at pressure P. F
Last Answer : An adsorption isotherm equation proposed by Langmuir is of the form `V = (V_(0)bPO)/((1 + bP))` where V is ... of V on P can be depicted as B. C. D.
Description : For calculating the evaporation rate over a reservoir surface E = 0.771 (1.465 - 0.00732B) (0.44 - 0.007375 V) (pe - pa), the equation is given by (A) Roohwer's, formula in M.K.S. (B) Roohwer's formula in F.P.S. (C) Dalton's formula in F.P.S. (D) Dalton's formula in M.K.S
Last Answer : Answer: Option A
Description : The voltage regulation of an alternator having 0.75 leading p.f. load, no-load induced e.m.f. of 2400V and rated terminal voltage of 3000V is ————————————— A) 20% B) —20% C) 150 D) -26.7
Last Answer : -20
Description : Draw the ray diagram in each case to show the position and nature of the image formed when the object is placed: (i) at the centre of curvature of a concave mirror (ii) between the pole P and focus F of ... front of a convex mirror (iv) at 2F of a convex lens (v) in front of a concave lens -Physics
Last Answer : Answer. Nature of image: Real, inverted and same size image is formed at the centre of curvature. Nature of image: Virtual, enlarged and erect image is formed behind the mirror. Nature of image: Virtual ... : Virtual, erect and diminished image is formed between O and F on the same side of object.
Description : According to Bond crushing law, the work required to form particle of size 'D' from very large feed is (where (S/V)p and (S/V) f are surface to volume ratio of the product and feed respectively). (A) (S/V)p (B) √(S/V)p (C) (S/V) 2 p (D) (S/V) f
Last Answer : (B) √(S/V)
Description : If we convert ∃u ∀v ∀x ∃y (P(f(u),v, x, y) → Q(u,v,y)) to ∀v ∀x (P(f(a),v, x, g(v,x)) → Q(a,v,g(v,x))) This process is known as (A) Simplification (B) Unification (C) Skolemization (D) Resolution
Last Answer : (C) Skolemization
Description : A shunt generator running at 1000 r.p.m. has generated e.m.f. as 200 V. If the speed increases to 1200 r.p.m., the generated e.m.f. will be nearly?
Last Answer : 200V/E2 = 1000/1200 E2= 240 V
Description : In the lever of third order, load W, effort P and fulcrum F are oriented as follows (A) W between P and F (B) F between W and P (C) P between W and F (D) W, P and F all on one side
Last Answer : (A) W between P and F
Description : If current is I and voltage is V, then power P is equal to
Last Answer : If current is I and voltage is V, then power P is equal to V x I
Description : In the expression of dynamic load capacity P=XVF r + YF a , V stands for? (a) Race rotation factor (b) Radial load factor (c) Thrust load factor (d) Service factor
Last Answer : (a) Race rotation factor
Description : In the expression of dynamic load capacity P=XVF(r) + YF(a), V stands for ? a) Race rotation factor b) Radial factor c) Thrust factor d) None of the listed
Last Answer : a) Race rotation factor
Description : Specified quantities of load bus are a) P and Q b) V and δ c) P and δ d) Q and V
Last Answer : a) P and Q
Description : In power system, the maximum number of buses are a) Generator buses b) Load buses c) Slack buses d) P-V buses
Last Answer : b) Load buses
Description : For load flow studies, what are the quantities specified at load bus are. a) P and V b) P and Q c) V and δ d) δ and Q
Last Answer : b) P and Q
Description : Average power dissipated in resistor if sinusoidal p.d of peak value 25 V is connected across a 20 Ω resistor is A. 15.6 W B. 15 W C. 16 W D. 17 W
Last Answer : 15.6 W
Description : In a variable speed induction motor derive V/f kept constant over a wide range of its frequency variation. The motor operates in the following mode : - a) Constant power mode b) Constant torque mode c) Constant slip mode d) Variable power and variable torque mode
Last Answer : In a variable speed induction motor derive V/f kept constant over a wide range of its frequency variation. The motor operates in the following mode : - Constant torque mode
Description : If frequency of certain wave is f, then it's velocity is A. v = fλ B. v = T⁄λ C. T2 D. 1⁄T2
Last Answer : v = fλ
Last Answer : If B is the flux density, I the length of conductor and v the velocity of conductor, then induced e.m.f. is given by Blv.
Description : If the critical shear stress of a channel is XC, then the average value of shear stress required to move the grain on the bank is (A) 0.5 XC (B) 0.75 TC (C) XC (D) 1.33 TC
Last Answer : Answer: Option B
Description : A d.c. source has an open circuit voltage of 30 V and an internal resistance of 1.5 Ohm. A resistive load is connected to the source. Maximum power dissipated in the load is (A) 300 W (B) 150 W (C) 45 W (D) 20 W
Last Answer : A d.c. source has an open circuit voltage of 30 V and an internal resistance of 1.5 Ohm. A resistive load is connected to the source. Maximum power dissipated in the load is 150 W
Description : A two-phase generator is connected to two 90Ω load resistors. Each coil generates 120 V ac. The value of current flowing through the common neutral line will be: A. 1.33 A B. 1.88 A C. 2.66 A D. 1.77 A
Last Answer : A two-phase generator is connected to two 90Ω load resistors. Each coil generates 120 V ac. The value of current flowing through the common neutral line will be: 1.77 A
Description : State the application of phase sequence indicator; clip on ammeter, frequency meter & P.F. meter.
Last Answer : Phase Sequence Indicator: 1. For finding correct phase sequence of supply 2. For obtaining exact instant of parallel operation of alternators. 3. For obtaining reversal of rotation ... 4. In electroplating industries 5. In various processes industries for measuring power factor
Last Answer : In a R-L series circuit the power factor P.F. is Leading.
Description : A straight wire of length 0.20 m moves at a steady speed of 3.0 m s-1 at right angles to the magnetic field of flux density 0.10 T. The e.m.f induced across ends of wire is A. 0.5 V B. 0.06 V C. 0.05 V D. 0.04 V
Last Answer : 0.06 V
Description : The e.m.f. induced in the armature of a shunt generator is 600 V. The armature resistance is 0.1 ohm. If the armature current is 200 A, the terminal voltage will be?
Last Answer : The e.m.f. induced in the armature of a shunt generator is 600 V. The armature resistance is 0.1 ohm. If the armature current is 200 A, the terminal voltage will be 580 V.
Description : If p(x) is a common multiple of degree 6 of the polynomials f(x) = x^3 + x^2 – x – 1 and g(x) = x^3 – x^2 + x – 1, then which -Maths 9th
Last Answer : answer:
Description : Let a function f defined from `R -> R` as `f(x)=[x+p^2 for x2` , If the function is surjective, then find the sum of all possible
Last Answer : Let a function f defined from `R -> R` as `f(x)=[x+p^2 for x2` , If the function is ... of all possible integral values of p in `[-100,100]`.
Description : if 16times the area of a square (A) is equal to the perimeter (P) f the square, then A is ______.
Last Answer : if 16times the area of a square (A) is equal to the perimeter (P) f the square, then A is ______.
Description : If α , β are the zeroes of f(x) = px 2 – 2x + 3p and α + β = αβ then the value of p is: (a) 1/3 (b) -2/3 (c) 2/3 (d) -1/3
Last Answer : (c) 2/3
Description : Two stage reciprocating air compressor with P – V diagram
Last Answer : Two stage reciprocating air compressors consist of two cylinders. One is called low-pressure cylinder and another is called high-pressure cylinder. When piston in a low-pressure cylinder is at ... & discharge valves open. This desired high-pressure air is then delivered to a receiver.
Description : The following is correct : (A) P = V x I (B) P = I ² x R (C) P = V ² / R (D) All of the above
Last Answer : The following is correct : (A) P = V x I (B) P = I ² x R (C) P = V ² / R (D) All of the above
Description : if pressure P is inversely proportional to volume (V) at constant temperature, then PV is constant (True/False)
Last Answer : if pressure P is inversely proportional to volume (V) at constant temperature, then PV is constant (True/False)
Description : Assume that the speed (v) of sound in air depends upon the pressure (P) and density (ρ) of air, then use dimensional analysis to obtain
Last Answer : Assume that the speed (v) of sound in air depends upon the pressure (P) and density (ρ) ... analysis to obtain an expression for the speed of sound.
Description : On a P-V diagram of an ideal gas, suppose a reversible adiabatic line intersects a reversible isothermal line at point A. Then at a point A, the slope of the reversible adiabatic line (∂P/∂V)s and the slope of the reversible isothermal line ... Y (C) (∂P/∂V)S = y(∂P/∂V)T (D) (∂P/∂V)S = 1/y(∂P/∂V)T
Last Answer : (C) (∂P/∂V)S = y(∂P/∂V)T
Description : The P/v ratio of a company is 50% and margin of safety is 40%. If present sales is Rs. 30,00,000 then Break Even Point in Rs. will be (a) Rs. 9,00,000 (b) Rs. 18,00,000 (c) Rs. 5,00,000 (d) None of the above
Last Answer : (b) Rs. 18,00,000
Description : An ideal gas is heated at constant volume and then expanded isothermally. Show processes on P-V & T-S diagrams.
Last Answer : Process 1-2 : Constant volume process Process 2-3 : Constant temperature process (Isothermal process)
Last Answer : e
Description : Two transformers having the same p.u. impedance connected in parallel share the connected load (A) equally (B) in proportion to the respective ratings (C) in proportion to the voltage ratio (D) in proportion to the zero phase displacement
Last Answer : Two transformers having the same p.u. impedance connected in parallel share the connected load in proportion to the respective ratings