MCQOPTIONS
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MCQOPTIONS
This section includes 8247 Mcqs, each offering curated multiple-choice questions to sharpen your Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 6951. |
Which of the following material handling equipments is not suitable for moving materials in varying paths ? |
| A. | Hand trolley |
| B. | Belt conveyor |
| C. | Crane |
| D. | Truck |
| Answer» C. Crane | |
| 6952. |
Globular form of cementite is formed during the __________ process. |
| A. | spherodising |
| B. | hardening |
| C. | annealing |
| D. | normalising |
| Answer» C. annealing | |
| 6953. |
Faraday's law of electrolysis is related to the |
| A. | cation speed. |
| B. | atomic number of the cation. |
| C. | equivalent mass of the electrolyte. |
| D. | none of these. |
| Answer» D. none of these. | |
| 6954. |
The two elements required to form substitutional solid solution should not have |
| A. | same crystalline structure. |
| B. | same valancy |
| C. | widely differing electronegativity. |
| D. | same atomic sizes. |
| Answer» D. same atomic sizes. | |
| 6955. |
Which of the following is not a mechanical pressure sensing element ? |
| A. | Bellows |
| B. | Diaphragm |
| C. | Bourdon tube |
| D. | U-tube |
| Answer» E. | |
| 6956. |
__________ are analysed using a polarograph. |
| A. | Isotonic solutions |
| B. | Solids |
| C. | Liquids |
| D. | Gases |
| Answer» C. Liquids | |
| 6957. |
Which of the following judges the accuracy of an instrument ? |
| A. | Dead zone |
| B. | Drift |
| C. | Static error |
| D. | None of these |
| Answer» D. None of these | |
| 6958. |
On-off controllers are normally used for |
| A. | low loads |
| B. | temperature changes |
| C. | flow rate changes |
| D. | none of these |
| Answer» B. temperature changes | |
| 6959. |
Magnetic flowmeters are generally not used for the velocity/flow measurement of hydrocarbons due to their |
| A. | low thermal conductivity. |
| B. | low electrical conductivity. |
| C. | high viscosity index. |
| D. | low flash point. |
| Answer» C. high viscosity index. | |
| 6960. |
Measurement of sub-zero Celcius temperature in industry is done most commonly by |
| A. | thermocouples |
| B. | resistance thermometers |
| C. | gas thermometers |
| D. | bi-metallic thermometers |
| Answer» C. gas thermometers | |
| 6961. |
Use of I-control along with P-control facilitates |
| A. | elimination of offset |
| B. | reduction of offset |
| C. | reduction of stability time |
| D. | none of these |
| Answer» B. reduction of offset | |
| 6962. |
Turbine flow meters are suitable for |
| A. | very limited flow ranges. |
| B. | cryogenic flow measurements. |
| C. | aerospace and in air borne applications. |
| D. | both (b) and (c). |
| Answer» E. | |
| 6963. |
Liquid discharge from a tank or reservoir can not be measured by |
| A. | orificemeters |
| B. | weirs |
| C. | mouthpieces |
| D. | notches |
| Answer» B. weirs | |
| 6964. |
The response of two tanks of same size and resistance in series is |
| A. | under damped |
| B. | critically damped |
| C. | over damped |
| D. | none of the above |
| Answer» C. over damped | |
| 6965. |
The frequency response of a dynamic element shows a constant magnitude ratio at all frequencies. The element exhibits a negative phase shift at all frequencies. The absolute value of the phase shift increases linearly with frequency. The element has the transfer function |
| A. | e |
| B. | <sup>- <i><sub>s</sub></i></sup> |
| C. | <img src="/_files/images/chemical-engineering/process-control/383-608-1.png"> |
| D. | <img src="/_files/images/chemical-engineering/process-control/383-608-2.png"> |
| E. | <img src="/_files/images/chemical-engineering/process-control/383-608-3.png"> |
| Answer» B. <sup>- <i><sub>s</sub></i></sup> | |
| 6966. |
The amplitude ratio for the sinusoidal response of __________ is < 1. |
| A. | transportation lag |
| B. | first order system |
| C. | second order system |
| D. | none of these |
| Answer» C. second order system | |
| 6967. |
Which of the following is a 'contact' pyrometer ? |
| A. | resistance pyrometer |
| B. | optical pyrometer |
| C. | radiation pyrometer |
| D. | infra red pyrometer |
| Answer» B. optical pyrometer | |
| 6968. |
Which of the following is not a speed measuring instrument ? |
| A. | Psychrometer |
| B. | Stroboscope |
| C. | Tachometer |
| D. | All (a), (b) and (c) |
| Answer» B. Stroboscope | |
| 6969. |
Which of the systems having the following transfer function is stable ? |
| A. | <img src="/_files/images/chemical-engineering/process-control/387-642-1.png"> |
| B. | <img src="/_files/images/chemical-engineering/process-control/387-642-2.png"> |
| C. | <img src="/_files/images/chemical-engineering/process-control/387-642-3.png"> |
| D. | <img src="/_files/images/chemical-engineering/process-control/387-642-4.png"> |
| Answer» D. <img src="/_files/images/chemical-engineering/process-control/387-642-4.png"> | |
| 6970. |
The calibration data of a thermocouple with its cold junction at 0 C are given below.The hot junction of the thermocouple is placed in a bath at 80 C, while its cold junction is at 20 C. What is the emf of thermocouple ? |
| A. | 3.26 mv |
| B. | 0.80 mv |
| C. | 2.46 mv |
| D. | 2.43 mv |
| Answer» D. 2.43 mv | |
| 6971. |
Pressure of 0.01 psi (absolute) can be measured by __________ gauge. |
| A. | ionisation |
| B. | Pirani |
| C. | Mcloid |
| D. | none of these |
| Answer» D. none of these | |
| 6972. |
High temperature of around 2000 C of incandescent gas mantles is measured by a/an |
| A. | specially designed thermocouple. |
| B. | optical pyrometer. |
| C. | radiation pyrometer. |
| D. | none of these. |
| Answer» D. none of these. | |
| 6973. |
The unit step response of the transfer function 1/(s2 + 2s + 3) |
| A. | has a non-zero slope at the origin. |
| B. | has a damped oscillatory characteristics. |
| C. | is overdamped |
| D. | is unstable |
| Answer» C. is overdamped | |
| 6974. |
The experimental response of the controlled variable y(t) for a step change of magnitude P in the manipulated variable x(t) is shown below :The appropriate transfer function of the process is |
| A. | <img src="/_files/images/chemical-engineering/process-control/386-636-2.png"> |
| B. | <img src="/_files/images/chemical-engineering/process-control/386-636-3.png"> |
| C. | <img src="/_files/images/chemical-engineering/process-control/386-636-4.png"> |
| D. | <img src="/_files/images/chemical-engineering/process-control/386-636-5.png"> |
| Answer» D. <img src="/_files/images/chemical-engineering/process-control/386-636-5.png"> | |
| 6975. |
A process is initially at steady state with its output y=l for an input u=l. The input is suddenly changed to 2 at time t=0. The output response is y(t)=1+2t. The transfer function of the process is |
| A. | 2/s |
| B. | <img src="/_files/images/chemical-engineering/process-control/385-624-1.png"> |
| C. | <img src="/_files/images/chemical-engineering/process-control/385-624-2.png"> |
| D. | <img src="/_files/images/chemical-engineering/process-control/385-624-3.png"> |
| Answer» E. | |
| 6976. |
The term analogous to the electrical current in a thermal system is the |
| A. | temperature difference |
| B. | heat flow rate |
| C. | heat content in the system |
| D. | none of these |
| Answer» C. heat content in the system | |
| 6977. |
Reset rate is the another term used for __________ time. |
| A. | dead |
| B. | integral |
| C. | derivative |
| D. | none of these |
| Answer» C. derivative | |
| 6978. |
Continuous measurement of moisture in paper is done by |
| A. | sling psychrometer. |
| B. | hair-hygrometer. |
| C. | weighing. |
| D. | high resistance Wheatstone's bridge circuit. |
| Answer» E. | |
| 6979. |
Psychrometer determines the |
| A. | humidity of gases |
| B. | moisture content of solids |
| C. | water of crystallisation |
| D. | hygroscopic nature of solids |
| Answer» B. moisture content of solids | |
| 6980. |
An ideal PID controller has the transfer function . The frequency at which the magnitude ratio of the controller is 1, is |
| A. | 0.5/0.2 |
| B. | 0.2/0.5 |
| C. | 0.2 x 0.5 |
| D. | 1/ |
| E. | <span class="root">0.2 x 0.5</span> |
| Answer» E. <span class="root">0.2 x 0.5</span> | |
| 6981. |
The deflection of the free end of the bimetallic strips in a bimetallic thermometer with temperature is nearly |
| A. | linear |
| B. | non-linear |
| C. | parabolic |
| D. | hyperbolic |
| Answer» B. non-linear | |
| 6982. |
Alphatron measures pressure __________ microns. |
| A. | < 1 |
| B. | < 3 |
| C. | > 3 |
| D. | < 0.1 |
| Answer» D. < 0.1 | |
| 6983. |
What is the ratio of output amplitude to input amplitude for a sinusoidal forcing function in a first order system ? |
| A. | 1 |
| B. | >1 |
| C. | < 1 |
| D. | none of these |
| Answer» D. none of these | |
| 6984. |
The unit step response of the transfer functionreaches its final steady state assymptotically after |
| A. | a monotonic increase. |
| B. | a monotonic decrease. |
| C. | initially increasing and then decreasing. |
| D. | increasing decreasing and then increasing. |
| Answer» B. a monotonic decrease. | |
| 6985. |
Pirani gauge is used for the measurement of |
| A. | very high pressure. |
| B. | high vacuum. |
| C. | liquid level under pressure. |
| D. | liquid level at atmospheric pressure |
| Answer» C. liquid level under pressure. | |
| 6986. |
The __________ of the fluid contained in the temperature sensing element (i.e., bulb) of filled system thermometers changes with change in temperature. |
| A. | pressure |
| B. | volume |
| C. | viscosity |
| D. | all (a), (b) and (c) |
| Answer» E. | |
| 6987. |
Transfer functions X/Y for which of the following block diagrams is |
| A. | <img src="/_files/images/chemical-engineering/process-control/367-431-2.png"> |
| B. | <img src="/_files/images/chemical-engineering/process-control/367-431-3.png"> |
| C. | <img src="/_files/images/chemical-engineering/process-control/367-431-4.png"> |
| D. | none of these |
| Answer» B. <img src="/_files/images/chemical-engineering/process-control/367-431-3.png"> | |
| 6988. |
The characteristic equation for the control system with a closed loop transfer function G1/1 + G2 is given by 1 + G2 = 0. The characteristic equation for the control system |
| A. | depends only upon the open loop transfer function. |
| B. | determines its stability. |
| C. | is the same for set point or load changes. |
| D. | all 'a', 'b' & 'c' |
| Answer» E. | |
| 6989. |
__________ thermometer can not measure sub-zero (< 0 C) temperature, |
| A. | Mercury in glass |
| B. | Bimetallic |
| C. | Vapor pressure |
| D. | Resistance |
| Answer» C. Vapor pressure | |
| 6990. |
Starting temperature of optical radiation pyrometer is __________ C. |
| A. | 800 |
| B. | 400 |
| C. | 1200 |
| D. | 1500 |
| Answer» B. 400 | |
| 6991. |
Liquid argon level in a pressurised storage tank (at 3 kg/cm2 ) is measured by a/an |
| A. | gage glass |
| B. | external float gage |
| C. | differential pressure gage |
| D. | none of these |
| Answer» D. none of these | |
| 6992. |
What is the dynamic error in a critically damped second order instrument for a ramp input (At) ? |
| A. | 0.5 AT |
| B. | 2 AT |
| C. | <span class="root">AT</span> |
| D. | 1.5 AT |
| Answer» C. <span class="root">AT</span> | |
| 6993. |
The transfer function for a first order process with time delay is |
| A. | <img src="/_files/images/chemical-engineering/process-control/383-600-1.png"> |
| B. | <img src="/_files/images/chemical-engineering/process-control/383-600-2.png"> |
| C. | <img src="/_files/images/chemical-engineering/process-control/383-600-3.png"> |
| D. | <img src="/_files/images/chemical-engineering/process-control/383-600-4.png"> |
| Answer» C. <img src="/_files/images/chemical-engineering/process-control/383-600-3.png"> | |
| 6994. |
A mercury barometer measures the __________ pressure. |
| A. | atmospheric |
| B. | gauge |
| C. | vacuum |
| D. | absolute |
| Answer» B. gauge | |
| 6995. |
Positioning controllers are used for |
| A. | low loads |
| B. | temperature changes |
| C. | high loads |
| D. | flow rate changes |
| Answer» D. flow rate changes | |
| 6996. |
The amplitude ratio for the sinusoidal response of a __________ is 1. |
| A. | first order system |
| B. | second order system |
| C. | transportation lag |
| D. | none of these |
| Answer» D. none of these | |
| 6997. |
Rankine cycle comprises of two isothermal and two __________ processes. |
| A. | isobaric |
| B. | polytropic |
| C. | isentropic |
| D. | none of these |
| Answer» E. | |
| 6998. |
Water hammer is caused in steam carrying pipelines, because of |
| A. | partial condensation of steam. |
| B. | vibration of the pipeline. |
| C. | high degree of superheat of steam. |
| D. | its exposure to torrential rain. |
| Answer» B. vibration of the pipeline. | |
| 6999. |
Powder metallurgy is used to produce |
| A. | high precision components with complex cavities and sharp features. |
| B. | components of large size. |
| C. | porosity free components. |
| D. | components of such alloys whose constituents do not form alloys readily. |
| Answer» D. components of such alloys whose constituents do not form alloys readily. | |
| 7000. |
Catalyst used in the catalytic converter employed in automobiles to convert CO into CO and for complete oxidation of un-burnt hydrocarbons is |
| A. | nickel |
| B. | cobalt |
| C. | vanadium |
| D. | platinum |
| Answer» E. | |