Dr. K. N. Trivedi - Prof and Head (Community Medicine) - Smt. N. H. L. MUNICIPAL MEDICAL COLLEGE

Chapter 3

MCQ (PSM) - Curtsey Dr. K. N. Trivedi - Prof and Head (Community Medicine)

1		Wt in kg is a
	a	discrete variable
	b	continuous variable
	c	nominal scale
	d	none
2		In India , death is to be registered within ------ days
	a	3
	b	7
	c	11
	d	14
3		A useful index to measure the lethality of an acute infectious disease is
	a	attack rate
	b	incidence
	c	case fatality rate
	d	none of above
4		In an outbreak of cholera in a village of 2000 population, 20 cases have occurred and 5 died. Case fatality rate is
	a	1%
	b	0.25%
	c	5%
	d	25%
5		All are true of standarised mortality ratio except
	a	expressed as rate per year
	b	can be adjusted for age
	c	can be use for events other for death
	d	ratio of observed death to expected death
6		Incidence is difine as
	a	no. of cases existing in agiven population at agiven moment
	b	no. of existing in agiven period
	c	no. of casesnew occuring during a spesific period
	d	no. of old cases present during a spesific piriod in agiven population
7		Secondary attack rate is calculated from
	a	minimum incubation period
	b	maximum IP
	c	average IP
	d	any of above
8		If a new drug is invented which prevent the mortality from the diseases but does not affect the cure then which of the following is true
	a	incidence will increase
	b	incidence will decrease
	c	prevalance will decrease
	d	prevalance will increase
9		In a stable situation
	a	incidence =prevalence +duration
	b	prevalence=incidence multiply duration
	c	incidence=prevalence multiply duration
	d	prevalence= incidence +duration
10		"CHERNOBYL" tragedy is an example of
	a	point sourse epidemic
	b	propagated epidemic
	c	modern epidemic
	d	continuous epidemic
11		Bhopal gas tegedy is example of
	a	slow epidemic
	b	continous epidemic
	c	point source epidemic
	d	propagated epidemic
12		Which is not an explanation for cyclic trend disease
	a	herd immunity variations
	b	envionmental conditions
	c	build up of susceptibles
	d	antigenic variations
13		The disese which is known as father of public health is
	a	small pox
	b	rabis
	c	plague
	d	cholera
14		Case control study is used for study of
	a	common diseases
	b	uncommon diseases
	c	rare diseases
	d	unknown diseases
15		Study of person who had already contrected the disease is called
	a	case control
	b	cohort study
	c	control cohort
	d	none
16		case control study useful for
	a	finding a rare case
	b	finding multiple risk factors
	c	finding incidence rate
	d	finding morbidity rate
17		All of following are advantages of case control study except
	a	cheaper
	b	less time consuming
	c	possible to study many diseases
	d	less chances of bias
18		Relative risk can be obtained from
	a	case study
	b	cohort study
	c	case control study
	d	experimental study
19		Relative risk could show an assocition between
	a	smoking and lung cancer
	b	OCP and pregnancy
	c	efficacy of 2 drugs
	d	attitude and endemic goitre
20		When launching a study many respondent are invited some of whom fail to come this is called
	a	response bias
	b	volunteer bias
	c	selection bias
	d	berkesonian bias
21		Which is false about cohort study
	a	incidence can be measured
	b	use to study chronic disease
	c	expensive
	d	always prospective
22		All are true of randamized controlled trial except
	a	groups are representative of the population
	b	bias may arise during evaluation
	c	both study and controll group should be comparable
	d	in a single blind trial the doctor does know of group allocation
23		Randomisation is useful to eliminate
	a	observer bias
	b	confounding factors
	c	patient bias
	d	sampling bias
24		Double blind study means
	a	observer is blind about the study
	b	person or group being observed are blind about study
	c	both observer and observed group is blind
	d	interpreters and analysers are blind about the study
25		Diseases which are imp. Into country in which they do not otherwise occur is
	a	exotic
	b	epizotic
	c	endemic
	d	none of above
26		All of the following require survielance acc. To WHO except
	a	chiocken pox
	b	yellow fever
	c	malaria
	d	rabies
27		Only human being are reservours of
	a	measels
	b	influenza
	c	salmonella
	d	rabies
28		Eradication is possible in all of the following diseases except
	a	measles
	b	polio
	c	tuberculosis
	d	dracunculosis
29		Vertical transmission is by
	a	mosquetoes
	b	direct contact
	c	droplet
	d	placenta
30		Transovarian transmission occurs in
	a	Malaria
	b	plague
	c	filariasis
	d	dengue fever
31		The mechanism of multiplication of plague bacilli in rat flea is called
	a	propogative
	b	cyclopropogative
	c	cyclodevelopmental
	d	only passive transmission
32		When disease enters and first symtoms appear is known as
	a	serial interval
	b	incubation period
	c	period of infectivity
	d	quarantine
33		Herd immunity is not imp[ortant in
	a	polio
	b	diptheria
	c	measles
	d	tetanus
34		heard immunity is not seen in
	a	tetanus
	b	pertusis
	c	diptheria
	d	cholera
35		Live attenuated vaccines are
	a	OPV
	b	hepatitis
	c	japanese B encephalitis
	d	chicken pox
36		Which of the following is live vaccine
	a	BCG
	b	cholera
	c	typhoid
	d	MMR
37		Live attentutated vaccine used in man is
	a	influenza
	b	rabies
	c	yellow fever
	d	japanese encephelities
38		Killed bacterial vaccine is
	a	BCG
	b	diptheria
	c	pertusis
	d	toxoid
39		Vaccine which must be stored in freezer compartment of the freeze is/are
	a	BCG
	b	OPV
	c	measles
	d	small pox
40		Notifiable diseas is
	a	varicella
	b	cholera
	c	malaria
	d	influenza
41		Internationally quarantinable disease are
	a	plague
	b	cholera
	c	yellowo fever
	d	all of above
42		Universal programme of immunisation includes
	a	BCG
	b	polio
	c	DPT
	d	MMR
43		Expanded programme of immunisation include all except
	a	BCG
	b	cholera
	c	Mumps
	d	Rubella
44		Which is true regarding universal programme of immunisation
	a	one dose BCG, 3 doses of DPT, 3 doses of OPV, 1 dose of MMR
	b	should be given on time
	c	must be potent
	d	all of above
45		Which of the following is most powerful chemical disinfectant
	a	phenol
	b	lysol
	c	dettol
	d	pttassium permangante
46		Rideal-Walker co-efficient or Carbolic co- efficient is used for
	a	expressing efficacy of carbolic acid
	b	estimating efficacy of carbolic acid for disinfecting feaces
	c	determining germicidal efficacy of adisinfectant in comparson to phenol
	d	none of above
47		Which of the following is an important disinfectant on account of effectively destroying gm + and gm - ve bacteria , viruses, and even spores at low pH level
	a	phenol
	b	alcohol
	c	chlorine
	d	hexachlorophene
48		Sharp insturments may be starilised with
	a	radiation
	b	lysol
	c	hot air
	d	any of above
49		The total no. of microorganism contained within or upon the surface of the item prior to eat being disinfected or sterilised is referred to as
	a	the bio load or bioburden
	b	the microbiologic profile
	c	both
	d	neither
50		The amount of bleaching powder to disinfect choleric stools is
	a	50mg/lit.
	b	75mg/lit.
	c	90mg/lit.
	d	100mg/lit.
51		In an epidemic first to be done is:
	a	identify the cases
	b	confirm the diagnosis
	c	identify the prone people
	d	identify the causative factors
52		40% formalin is used to sterilize
	a	plastic synringes
	b	all microbes+spores
	c	clothes
	d	stitiches

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