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Recently added practice questions

11881. A sampling distribution is the probability distribution for which one of the following___________?
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A. A population

B. A sample statistic

C. A population parameter

D. A sample

11882. A sample of natural gas containing 80% methane (CH4) and rest nitrogen (N2) is burnt with 20% excess air. With 80% of the combustibles producing CO2 and the remainder going to CO, the Orsat analysis in volume percent is_________________?
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A. CO2 : 6.39, CO : 1.60, O2 : 3.99, H2O:25.96, N2:72.06

B. CO2 : 7.42, CO : 1.86, O2 : 4.64, N2:86.02

C. CO2 : 6.26, CO : 1.56, O2 : 3.91, H2O :15.66, N2 : 72.60

D. CO2 : 7.60, CO : 1.90, O2 : 4.75, N2 : 85.74

11883. A sample of 24 observations is taken from a population that has 150 elements. The sampling distribution of is___________?
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A. Approximately normal because the sample size is large in comparsion to the population size

B. Approximately normal because is always approximately normally distributed

C. Normal if the population is normally distributed

D. Approximately normal because of the central limit theorem

11884. A salt manufacturing company produced a total of 5000 tonnes of salt in January of a particular year. Starting from February its production increased by 100 tonnes every month over the previous months until the end of the year. Find its average monthly production for that year?
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A. 6060

B. 4440

C. 5550

D. 7070

11885. A runs 1 2/3 times as fast as B. If A gives B a start of 80 m, how far must the winning post be so that A and B might reach it at the same time?
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A. 200 m

B. 270 m

C. 300 m

D. 160 m

11886. A rotary converter is a single machine with______________?
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A. one armature and one field

B. two armatures and one field

C. one armature and two fields

D. none of the above

11887. A Rotameter through which air at room temperature and atmospheric pressure is flowing gives a certain reading for a flow rate of 100 cc/sec. If helium (molecular weight 4) is used and Rotameter shows the same reading, the flow rate (cc/sec) is__________________?
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A. 42

B. 325

C. 269

D. 26

11888. A rolled steel joist is simply supported at its ends and carries a uniformly distributed load which causes a maximum deflection of 10 mm and slope at the ends of 0.002 radian. The length of the joist will be________________?
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A. 16 m

B. 14 m

C. 10 m

D. 12 m

11889. A rocket engine for the combustion of its fuel_____________________?
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A. does not require oxygen

B. uses surrounding air

C. depends on electrical energy supplied by solar cells

D. carries its own oxygen

E. uses compressed atmospheric air

11890. A rising suicide rate associated with normlessness and a lack of social regulation can be described as______________?
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A. altruistic suicide

B. anomic suicide

C. fatalistic suicide

D. egoistic suicide

11891. A rise in temperature ______________________?
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A. Does not affect photo-chemical reaction rates

B. Does not affect a catalysed reaction

C. All A., B. and C.

D. Normally tends to increase the reaction rate

11892. A rheostat differs from potentiometer in the respect that it_____________?
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A. offers large number of tapping

B. has large number of turns

C. has higher wattage rating

D. has lower wattage rating

11893. A reversible change in the atomic structure of the steel with a corresponding change in the properties is known as_________________?
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A. precipitation

B. heat treatment

C. austempering

D. allotropic change

E. recrystallisation

11894. A retaining wall and is the horizontal earth pressure, the factor of safety If is weight of against sliding, is_____________?
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A. 1.5

B. 1.25

C. 2

D. 1

11895. A retailer buys a sewing machine at a discount of 15% and sells it for Rs. 1955. Thus, he makes a profit of 15%. The discount is:
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A. None of these

B. Rs. 270

C. Rs. 300

D. Rs. 290

11896. A restorative material which has a high proportional limit, compared with one with a lower proportional limit would have________________?
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A. A higher modulus of elasticity

B. More resistance to permanent deformation

C. Greater ductility

D. Greater toughness

E. A higher modulus of elasticity

11897. A repulsion motor is equipped with__________?
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A. slip rings

B. commutator

C. both A. and (b)

D. none of the above

11898. A reluctance motor____________?
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A. all of the above

B. needs no D.C. excitation

C. is self-starting

D. is constant speed motor

11899. A relocate program form is the one which_______________?
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A. can itself perform the relocation of its address-sensitive portions

B. consists of a program and relevant information for its relocation

C. All of the above

D. cannot be made to execute in any area of storage other than the one designated for it at the time of its coding or translation

11900. A reliable screening test for platelet function is_______________?
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A. Clot retraction time

B. PT

C. Thrombin

D. CT

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