Users Also Read

MCQ's Search Engine

Electrical Engineering

Mechanical Engineering

Civil Engineering

Automobile Engineering

Chemical Engineering

Computer Engineering

Electronics Engineering

Medical Science Engg

Q1. | A thermal power plant has an efficiency of 0.4. If 0.6 kg of coal is burnt to generate 1 kWh, the calorific value of coal is |

A. | about 3500 kcal/kg [Correct Answer] |

B. | about 2500 kcal/kg [Wrong Answer] |

C. | about 1500 kcal/kg [Wrong Answer] |

D. | about 7500 kcal/kg [Wrong Answer] |

View Answer
Explanation:-
Answer : ADiscuss it below :!! OOPS Login [Click here] is required to post your answer/resultHelp other students, write article, leave your comments |

**Also Read Similar Questions Below :**

⇒ In an FM system, when the AF is 500 Hz and the AF voltage is 2.4 V, the deviation is 4.8 kHz. If the AF voltage is now increased to 7.2 V, the new deviation will be

4.8 kHz

9.6 kHz

14.4 kHz

28.8 kHz

⇒ A narrowband amplifier is one that has a passband

limited to 2000 Hz only

limited to audio frequency range only

near cut off region of active device

approximately 10% of its central frequency

⇒ Binary 1000 multiplied by binary 1000 gives

10000

100000

1000000

10000000

⇒ If the variance σ

_{x}

^{2}of

*d*(

*n*) =

*x*(

*n*) -

*x*(

*n*- 1) is one-tenth the variance σ

_{x}

^{2}of a stationary zero mean discrete time signal

*x*(

*n*), then the normalized autocorrelation function R

_{xx}(

*x*)/σ

_{x}

^{2}at

*k*= 1 is

0.95

0.9

0.1

0.05

⇒ When a TTL is driving an CMOS gates it is necessary to ensure that

V

_{OL}(for TTL) ≤ V

_{IL}(for CMOS) and V

_{0H}(for TTL) ≥ VIH (for CMOS)

V

_{0L}(for TTL) ≥ V

_{IL}(for CMOS)

V

_{0H}(for TTL) ≤ V

_{IH}(for CMOS)

V

_{0L}(for TTL) ≥ V

_{IL}(for CMOS) and V

_{0H}(for TTL) ≤ VIH (for CMOS)

⇒ The total number of channels allotted for cellular telephone is

666

333

221

111

⇒ Silicon is not suitable for fabrication of light emitting diodes because it is

an indirect band gap semiconductor

direct band gap semiconductor

wideband gap semiconductor

narrowband gap semiconductor

⇒ A volt ratio box should have low resistance.

TRUE

FALSE

⇒ One ampere means the flow of

One coulomb each minute

One electron per second

One coulomb per second

One coulomb each hour

⇒ In

*p*type semiconductor holes are majority carriers.

TRUE

FALSE

⇒ A 300 MHz plane EM wave is propagating in free space. The wave is incident normally on an infinite copper slap. The antenuation constant for the wave is (σ

_{copper}= 5.8 x 10

^{7}mho/ m). The skin depth is

0.005 x 10

^{-3}m

0.0038 x 10

^{-3}m

0.0028 x 10

^{-3}m

0.0024 x 10

^{-3}m

⇒ The following circuit is implementation of

- Sum of full adder
- Carry of half adder
- Difference of full subtractor <
- The circuitry of ripple counter is more complex than that of synchronous counter.
- The maximum frequency of operation of ripple counter depends on the modulus of the counter.
- The maximum frequency of operation of synchronous counter does not depend on the modulus of the counter.
- It must have 6 gates
- It must have feedback
- Its output should depend on past value

(i) only

(iii) only

(ii) only

(i) and (ii)

⇒ The spectral component of noise associated with

*k*

^{th}frequency is given, in the limit as Δ

*f*→ 0 by

*n*(

_{k}*t*) written as

*n*(

_{k}*t*) = C

_{k}cos (2p

*k*Δ

*ft*+ θ

_{k1, 2 only1, 3 only1, 2, 32, 3 only}

⇒ The highest modulating frequency typically used in AM systems is

1 kHz

5 kHz

20 kHz

50 kHz

⇒ Read the following statements

1 only

1, 2

1, 2, 3

2, 3

⇒ For the two ports in figure,

*y*

_{11}= 8 mho,

*y*

_{12}=

*y*

_{21}= -6 mho and

*y*

_{22}= 6 mho. The values of Y

_{A}, Y

_{B}, Y

_{C}respectively

2, 6, 6 mho

2, 6, 0 mho

2, 0, 6 mho

2, 6, 8 mho

⇒ For a good conducting medium the intrinsic impedance is

σωμ ∠p/2

ωμ /σ ∠45°

ωμ/σ ∠p/2

ωμ/σ ∠0°

⇒

Match the following:

List I (Form) | List II (Network) | ||
---|---|---|---|

A. | Cauer I | 1. | L in series arm and C in shunt arm of ladder |

B. | Cauer II | 2. | C in series arm and L in shunt arm of ladder |

C. | Foster I | 3. | Series combination of L and C in parallel |

D. | Foster II | 4. | Parallel combination of L and C in series |

A-1, B-2, C-3, D-4

A-1, B-2, C-4, D-3

A-2, B-1, C-4, D-3

A-2, B-1, C-3, D-4

⇒ A 2 bit BCD D/A converter is a weighted resistor type with E

_{R}= 1V, R = 1 MΩ and R

*= 10KΩ then Resolution in percent and volt is __________ .*

_{f}1%, 1 mv

10%, 10 mv

10%, 1 mv

1%, 10 mv

⇒ Household tape recorders use

separate motor for each operation

only one motor for all operations

one motor for capstan and another for take up reel

a total of 3 motors

⇒ Which of the following statement is correct for two wattmeters method of power measurement in 3 phase circuit?

Power can be measured by this method only for star connected loads

When two wattmeters have equal readings power factor is 0.5.

When power factor is 1, one of the wattmeters readings is zero

When the two wattmeter read equal and opposite, p.f. is zero.

⇒ If A = 3 +

*j*1 and B = 4 +

*j*3, A - B =

8.062 ∠29.7°

10 ∠45°

2.236 ∠243.43°

6.72 ∠243.43°

⇒ If velocity of sound waves in air at 0°C is 330 m/s, the velocity at 40°C is about

330 m/s

334 m/s

353 m/s

380 m/s

⇒ Which of the following characteristic are necessary for a sequential circuit?

1, 2, 3

1, 2

2, 3

1, 3

⇒ In a minimum function

the degree of numerator and denominator are equal

the degree of numerator and denominator are unequal

the degree of numerator is one more than degree of denominator

the degree of numerator is one less than degree of denominator

⇒ The response of D'Arsonval galvanometer is over damped if

D

^{2}> 4CJ

D

^{2}> 2CJ

D

^{2}< 4CJ

D

^{2}< 2CJ

⇒ In a backward wave oscillator the wave travelling along the line winds itself back and forth

TRUE

FALSE

⇒

**Assertion (A):** In C it is possible for functions to call themselves.

**Reason (R):** C makes use of 'Pointers'.

Both A and R are correct and R is correct explanation of A

Both A and R are correct but R is not correct explanation of A

A is correct R is wrong

A is wrong R is correct

⇒ For a superconductor, magnetisation M in a field H is

extremely small

- H

- I

zero

⇒ A leakage capacitor can be represented by a capacitance C and resistance R in parallel C.

TRUE

FALSE