MCQOPTIONS
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MCQOPTIONS
This section includes 2242 Mcqs, each offering curated multiple-choice questions to sharpen your Php knowledge and support exam preparation. Choose a topic below to get started.
| 851. |
_______ sampler is suitable for soft soils. |
| A. | Open drive sampler |
| B. | Rotary sampler |
| C. | Stationary position |
| D. | No sampler |
| Answer» D. No sampler | |
| 852. |
Thick wall samplers have area ratio______ |
| A. | greater than 20 -35% |
| B. | greater than 10- 25% |
| C. | lesser than 10 -25% |
| D. | lesser than 15 -35% |
| Answer» C. lesser than 10 -25% | |
| 853. |
Cape sleeves cover the knee of the worker. |
| A. | True |
| B. | False |
| Answer» C. | |
| 854. |
Gloves used in foundries are made up of copper fabric. |
| A. | True |
| B. | False |
| Answer» C. | |
| 855. |
What is the maximum amount of phenol concentration found in a foundry? |
| A. | 3 ppm |
| B. | 4 ppm |
| C. | 5 ppm |
| D. | 6 ppm |
| Answer» D. 6 ppm | |
| 856. |
What is the amount of noise produced in hand ramming with a hammer? |
| A. | 90 dB |
| B. | 95 dB |
| C. | 100 dB |
| D. | 105 dB |
| Answer» C. 100 dB | |
| 857. |
Above what noise levels should hearing protector be worn by a worker? |
| A. | 80 dB |
| B. | 85 dB |
| C. | 90 dB |
| D. | 95 dB |
| Answer» C. 90 dB | |
| 858. |
_________ can be used for recharging the portable devices. |
| A. | Solar photovoltaic cells |
| B. | Solar panels |
| C. | Solar batteries |
| D. | Solar dishes |
| Answer» C. Solar batteries | |
| 859. |
Solar power is a good __________ renewable source. |
| A. | Commercial |
| B. | Economical |
| C. | Commercial and economical |
| D. | Neither commercial nor economical |
| Answer» C. Commercial and economical | |
| 860. |
Solar photovoltaic cells are often connected electrically in _______ |
| A. | Series |
| B. | Parallel |
| C. | Randomly |
| D. | Neither series nor parallel |
| Answer» B. Parallel | |
| 861. |
The main application of solar cells is to generate electricity from __________ |
| A. | Water |
| B. | Sunlight |
| C. | Wind |
| D. | Biomass |
| Answer» C. Wind | |
| 862. |
Wind generator is used for ________ |
| A. | Power generation |
| B. | Heat generation |
| C. | Power dissipation |
| D. | Power consumption |
| Answer» B. Heat generation | |
| 863. |
Non conventional energy sources are those energy sources that are _________ |
| A. | Renewable |
| B. | Non-renewable |
| C. | Produced from electricity |
| D. | Produced from heat |
| Answer» B. Non-renewable | |
| 864. |
Total cross-sectional area of earthing conductor depends on _____________ |
| A. | Minimum fault current |
| B. | Maximum fault current |
| C. | System output voltage |
| D. | System input voltage |
| Answer» C. System output voltage | |
| 865. |
Which of the following ratio is equal to N1/N2? |
| A. | L1/L2 |
| B. | L2/L1 |
| C. | √ (L1/L2) |
| D. | √ (L2/L1) |
| Answer» D. √ (L2/L1) | |
| 866. |
Considering transformer as a magnetically coupled circuit, the voltage at the primary of the transformer is _________________ |
| A. | R1i1 + L1*di1/dt – M*di2/dt |
| B. | R1i1 + L1*di1/dt + M*di2/dt |
| C. | R1i1 – L1*di1/dt + M*di2/dt |
| D. | R1i1 – L1*di1/dt – M*di2/dt |
| Answer» B. R1i1 + L1*di1/dt + M*di2/dt | |
| 867. |
For a constant volume system, the size of batch reactor is _______________ PFR. |
| A. | smaller than |
| B. | larger than |
| C. | same as |
| D. | cannot be compared |
| Answer» D. cannot be compared | |
| 868. |
Find the conversion of a 25 litre PFR if a gaseous feed of pure A (2 mol/lit, 150 mol/min)Is decomposed, kinetics are as follows.A → 2.5R-rA = (15min-1) CA |
| A. | 0.89 |
| B. | 0.92 |
| C. | 0.45 |
| D. | 0.68 |
| Answer» C. 0.45 | |
| 869. |
Replace the existing MFR with a PFR and calculate the new conversion if a homogeneous liquid phase reaction with reaction kinetics as follows.A → R-rA = kCA2 with 30% conversion |
| A. | 0.65 |
| B. | 0.43 |
| C. | 0.38 |
| D. | 0.92 |
| Answer» D. 0.92 | |
| 870. |
An existing MFR is to be replaced by the one 4 times larger than it. Find the new conversion if a homogeneous liquid phase reaction with reaction kinetics as follows.A → R-rA = kCA2 with 30% conversion. |
| A. | 0.67 |
| B. | 0.45 |
| C. | 0.53 |
| D. | 0.92 |
| Answer» D. 0.92 | |
| 871. |
Find the volume of reactor needed for 70% conversion of A to product. Aqueous feed of A and B (200lit/min, 20mmolA/lit, 50mmolB/lit) is fed to MFR. Reaction kinetics is as followsA+B → P-rA = 200CACB mol/lit-min |
| A. | 12.5 |
| B. | 3.6 |
| C. | 6.4 |
| D. | 1.5 |
| Answer» D. 1.5 | |
| 872. |
Where does neutral axis of column lie? |
| A. | Vertical plane |
| B. | Horizontal plane |
| C. | Both of them |
| D. | Neither of them |
| Answer» C. Both of them | |
| 873. |
How many assumptions are made in cantilever method for solving a building frame? |
| A. | 1 |
| B. | 2 |
| C. | 3 |
| D. | 4 |
| Answer» D. 4 | |
| 874. |
Cantilever beam is appropriate if frame is short and thick.State whether the above statement is true or false |
| A. | True |
| B. | False |
| Answer» C. | |
| 875. |
Cantilever method is based upon same action as a long cantilever beam subjected to a :-a) Transverse loadb) Axial loadc) Momentd) No load State whether the above statement is true or false |
| A. | Transverse loadb) Axial loadc) Momentd) No load State whether the above statement is true or falsea) True |
| B. | Axial load |
| C. | Moment |
| D. | No load State whether the above statement is true or falsea) Trueb) FalseView Answer |
| Answer» B. Axial load | |
| 876. |
Portal method is suitable for non-uniformly framed buildings.State whether the above statement is true or false |
| A. | True |
| B. | False |
| Answer» C. | |
| 877. |
A building bent deflects in the way same as a:- |
| A. | Cantilever beam |
| B. | Fixed beam |
| C. | Truss system |
| D. | Portal frame |
| Answer» E. | |
| 878. |
Do new device ID should be a globally unique identifier. |
| A. | False |
| B. | True |
| Answer» C. | |
| 879. |
Command to change the device Id? |
| A. | iotkit-admin set-device-id new-device-id |
| B. | iotkit – admin set – device – id new – device – id |
| C. | iotkit-admin setdevice-id newdevice-id |
| D. | iotkit-admin set-device-id new-device-id |
| Answer» E. | |
| 880. |
Default, device Id is equal to _________ |
| A. | IP Address |
| B. | MAC Address |
| C. | ISP |
| D. | UI |
| Answer» C. ISP | |
| 881. |
What is the image that we have been using to boot Intel Galileo Gen 2 board? |
| A. | Local agent |
| B. | IoTkit |
| C. | Device Id |
| D. | SSH Terminal |
| Answer» B. IoTkit | |
| 882. |
Cold impression die forging is suited for mass production. |
| A. | True |
| B. | False |
| Answer» C. | |
| 883. |
Impression die forging is used only for multiple-pass process. |
| A. | True |
| B. | False |
| Answer» C. | |
| 884. |
In forging dies, what is the minimum degree to which the drafts are made? |
| A. | 1o |
| B. | 2o |
| C. | 3o |
| D. | 4o |
| Answer» D. 4o | |
| 885. |
In compressed impression die forging, what is typically the shape of the solid blanks? |
| A. | Cylindrical |
| B. | Conical |
| C. | Spherical |
| D. | Pyramidal |
| Answer» B. Conical | |
| 886. |
What is the corner frequency of the resulting STC network? |
| A. | 1 Hz |
| B. | 0.16 Hz |
| C. | 0.33 Hz |
| D. | 0.5 Hz |
| Answer» C. 0.33 Hz | |
| 887. |
Select the largest possible value for a feedback resistor RF so that at least ±10 V of output signal swing remains available. |
| A. | 10 kΩ |
| B. | 100 kΩ |
| C. | 1 MΩ |
| D. | 10 MΩ |
| Answer» E. | |
| 888. |
Assuming that when the power supply is turned on the capacitor voltage is zero, how long does it take for the amplifier to saturate? |
| A. | 3s |
| B. | 6s |
| C. | 9s |
| D. | 12s |
| Answer» C. 9s | |
| 889. |
Consider an inverting amplifier circuit designed using an op amp and two resistors, R1 = 10 kΩ and R2 = 1 MΩ. If the op amp is specified to have an input bias current of 100 nA and an input offset current of 10 nA, find the output dc offset voltage resulting. |
| A. | 0.1 mV |
| B. | 1 mV |
| C. | 10 mV |
| D. | 100 mV (Q.8-Q.10) Consider a Miller integrator with a time constant of 1ms and an input resistance of 10 kΩ. Let the op amp have VOS (offset voltag |
| E. | = 2 mV and output saturation voltages of ±12 V. |
| Answer» E. = 2 mV and output saturation voltages of ±12 V. | |
| 890. |
Consider the circuit shown below which reduces the impact of the input bias current. If IB1 = IB2 = Input bias current, then determine the value of R3 so that the output voltage (v0) is not impacted by the input bias current. |
| A. | (R1 R2)/(R1+R2) |
| B. | (R1 R2)/(R1-R2) |
| C. | R1-(R1 R2)/(R1+R2) |
| D. | R2- (R1 R2)/(R1+R2) |
| Answer» B. (R1 R2)/(R1-R2) | |
| 891. |
For the amplifier shown determine the value of the bias current (Ib) and input offset current (Io) respectively. |
| A. | Ib = IB1 + IB2 Io = IB1 – IB2 |
| B. | and input offset current (Io) respectively. a) Ib = IB1 + IB2 Io = IB1 – IB2b) Ib = IB1 + IB2 Io = | IB1 – IB2 | |
| C. | Ib = 0.5(IB1 + IB2) Io = | IB1 – IB2 | |
| D. | Ib = 0.5(IB1 + IB2) Io = IB1 – IB2 |
| Answer» D. Ib = 0.5(IB1 + IB2) Io = IB1 – IB2 | |
| 892. |
The circuit is to operate at a temperature in the range 0°C to 75°C and the temperature coefficient of VOS is 10 μV/°C? |
| A. | 8.5 mV |
| B. | 9 mV |
| C. | 9.5 mV |
| D. | 10 mV |
| Answer» D. 10 mV | |
| 893. |
Consider an inverting amplifier with a nominal gain of 1000 constructed from an op amp with an input offset voltage of 3 mV and with output saturation levels of ±10 V. What is (approximately) the peak sine-wave input signal that can be applied without output clipping? |
| A. | 7 mV |
| B. | 10 mV |
| C. | 13 mV |
| D. | 9mV (Q2 & Q.3) Consider an inverting amplifier with a nominal gain of 1000 constructed from an op amp with an input offset voltage of 3 mV and with output saturation levels of ±10 V. If the effect of VOs(input offset voltag |
| E. | is nulled at room temperature (250C), how large an input can one now apply if: |
| Answer» B. 10 mV | |
| 894. |
For a step-up/step-down chopper, if α (duty cycle) = 0.5 then |
| A. | Vo = Vs |
| B. | Vo < Vs |
| C. | Vo > Vs |
| D. | none of the mentioned |
| E. | = 0.5 thena) Vo = Vsb) Vo < Vsc) Vo > Vsd) none of the mentioned |
| Answer» B. Vo < Vs | |
| 895. |
A step down chopper has input dc voltage of 220 V and R = 10 Ω in series with L = 65 mH. If the load current varies linearly between 11 A and 17 A, then find the duty cycle α. |
| A. | 1 |
| B. | 0.4 |
| C. | 0.6 |
| D. | 0.7 |
| Answer» E. | |
| 896. |
A step down chopper has Vs = 230 V and R = 10 Ω. For a duty cycle of 0.4, the power taken by the chopper is 2097 Watts. Find the chopper efficiency. Take the voltage drop across the chopper switch as 2 V. |
| A. | 98 % |
| B. | 89.96 % |
| C. | 99.14 % |
| D. | 96.54 % |
| Answer» D. 96.54 % | |
| 897. |
The expression for a step-up/step-down chopper with α as the duty cycle and Vs as the dc input voltage is |
| A. | Vs/1 – α |
| B. | α x Vs |
| C. | Vs (α/1-α) |
| D. | Vs (α/1+α) |
| Answer» D. Vs (α/1+α) | |
| 898. |
The below given chopper circuit is that of a |
| A. | step-up chopper |
| B. | step-down chopper |
| C. | step-up/step-down chopper |
| D. | none of the mentioned |
| Answer» D. none of the mentioned | |
| 899. |
For the step-down chopper shown in the figure below, dc source voltage = 230 V. Find the power input to the chopper If load of R = 10 Ω is connected. Duty cycle = 40 %. |
| A. | 2300 W |
| B. | 2097 W |
| C. | 2560 W |
| D. | 5290 W |
| Answer» C. 2560 W | |
| 900. |
For the step-down chopper shown in the figure below, dc source voltage = 230 V. Find the power delivered to the load of R = 10 Ω. Duty cycle = 40 %. Take voltage drop at the switch to be 2 V. |
| A. | 1 kW |
| B. | 2.08 kW |
| C. | 569 W |
| D. | 207 W |
| Answer» C. 569 W | |