Explore topic-wise MCQs in Php.

This section includes 2095 Mcqs, each offering curated multiple-choice questions to sharpen your Php knowledge and support exam preparation. Choose a topic below to get started.

151.

The mitochondrial genome has _____________ stop codons.

A. 1
B. 2
C. 3
D. 4
Answer» E.
152.

According to the pairing concept of wobble hypothesis base “I” in the anticodon does not pair with?

A. A
B. U
C. G
D. C
Answer» D. C
153.

Bubbles of air in radiator is sign of _________ problem.

A. cracked block
B. blown head gasket
C. seized block
D. lack of engine oil
Answer» C. seized block
154.

By which relation speed of piston can be calculated inside cylinder block?(L-Length of stoke, D-Diameter, N-speed of engine)

A. 2LDN
B. 2LN
C. 2πLD
D. 2πL
E. 2LDNb) 2LNc) 2πLDd) 2πL
Answer» C. 2πLD
155.

Which of the following isn’t a cylinder block part?

A. cylinder in which piston slides up and down
B. openings for valves
C. passages for flow of cooling water
D. carburettor
Answer» E.
156.

_________ serve as a support and enclosure for moving parts.

A. cylinder block
B. cylinder head
C. crank case
D. connecting rod
Answer» B. cylinder head
157.

__________ is caused due to endothelial damage.

A. Atherosclerosis
B. Cancer
C. Alzheimer’s Disease
D. Ringworm
Answer» B. Cancer
158.

There are about 500 g endothelium cells in an adult human.

A. TRUE
B. FALSE
Answer» C.
159.

How thick is the endothelial layer of the cornea?

A. 80 mm
B. 50 µm
C. 1 nm
D. 1 cm
Answer» C. 1 nm
160.

The mesodermal layer maintains the proper dilation and constriction of the blood vessels.

A. TRUE
B. FALSE
Answer» C.
161.

When the endothelial layer of small arteries is not able to function normally, then the condition is termed as endothelial dysfunction.

A. TRUE
B. FALSE
Answer» B. FALSE
162.

Endothelial cells in direct contact with blood are called as ___________ endothelial cells.

A. vascular
B. pulmonary
C. hepatic
D. squamous
Answer» B. pulmonary
163.

What is the innermost germ layer in simpler organisms like sponges?

A. Choanoderm
B. Endoderm
C. Mesoderm
D. Ectoderm
Answer» B. Endoderm
164.

Which of the following is not a triploblastic organism?

A. Human
B. Mouse
C. Cnidaria
D. Flatworms
Answer» D. Flatworms
165.

Endothelium of the interior surfaces of the heart chambers is called as _________________

A. pericardium
B. endocardium
C. mesoderm
D. ectoderm
Answer» C. mesoderm
166.

When the blastula has three primary germ layers, it is called as ____________

A. triploblasty
B. diploblasty
C. organogenesis
D. spermatogenesis
Answer» B. diploblasty
167.

Is the following statement correct?Statement: Thompson construction is used to convert Regular expression to finite automata.

A. Yes
B. No
Answer» B. No
168.

State true or false:Statement: Regular expression can directly be converted to DFA without intermediate steps.

A. true
B. false
Answer» C.
169.

NFA to DFA conversion is done via

A. Subset Construction method
B. Warshalls Algorithm
C. Ardens theorem
D. None of the mentioned
Answer» B. Warshalls Algorithm
170.

Which of the following conversion is not feasible?

A. Regular expression to automaton conversion
B. Automaton to Regular Expression Conversion
C. NFA to DFA
D. None of the mentioned
Answer» E.
171.

Once the components are identified, in a multicomponent distillation they are called

A. Key Components
B. Mixed Components
C. Flow Components
D. Gain Components
Answer» B. Mixed Components
172.

In multicomponent distillation, the separation of components is calculated using

A. Assumed flows of species
B. Assumed flows of reflux
C. Assumed flows of Vapor
D. Assumed flows of liquid
Answer» D. Assumed flows of liquid
173.

Gilliland’s x intercept is given as

A. Rmin/R+1
B. R/R+1
C. Nmin/R+1
D. R-Rmin/R+1
Answer» E.
174.

Gilliland’s y intercept is given as

A. Nmin/N+1
B. N-Nmin/N+1
C. N+Nmin/N+1
D. N/N+1
Answer» C. N+Nmin/N+1
175.

If the fractional recovery of light key in the distillate is FR, then light key in the feed is

A. DxD= (FRD)+FxLK
B. DxD= (FRD)/FxLK
C. DxD= (FRD)FxLK
D. DxD= (FRD)
Answer» D. DxD= (FRD)
176.

For the light key component, Equilibrium relation is

A. yK=x
B. Kx=y
C. Depend upon trays
D. Can’t be specified
Answer» B. Kx=y
177.

What does the minimum fluidization velocity in the bed depends on?

A. Size distribution of solids
B. Pumping power
C. Diameter of bed
D. All of the mentioned
Answer» E.
178.

How the liquid behave across the fluidized bed, when the velocity is more than minimum fluidization?

A. Bubbles formation
B. Slugs formation
C. No bubbles
D. None of the mentioned
Answer» D. None of the mentioned
179.

In the packed bed, at relatively low flow rates pressure drop is approximately proportional to gas velocity, true or false?

A. True
B. False
Answer» B. False
180.

Calculate the BOD load for the following data.Flow: 800 m3/dBOD load: 1000 mg/L

A. 1000 kg/d
B. 800 kg/d
C. 500 kg/d
D. 1500 kg/d
Answer» C. 500 kg/d
181.

While designing an aeration tank for the ASP what is the volumetric organic loading rate considered?

A. 0.3-3
B. 0.03-0.2
C. 3-5
D. 5-7
Answer» B. 0.03-0.2
182.

What is the typical value of the F/M ratio considered for an extended ASP process?

A. 0.04 g/g.d
B. 0.1 g/g.d
C. 0.4 g/g.d
D. 0.01 g/g.d
Answer» C. 0.4 g/g.d
183.

What is the typical value of the F/M ratio considered for an ASP process?

A. 0.04 g/g.d
B. 0.1 g/g.d
C. 0.4 g/g.d
D. 0.01 g/g.d
Answer» B. 0.1 g/g.d
184.

For the removal of phosphorous through Activated Sludge Process (ASP) what would be the Solid retention time considered?

A. 18 hours
B. 1-2 days
C. 10 hrs
D. 2-4 days
Answer» E.
185.

For the removal of nitrogen completely through Activated Sludge Process (ASP) what would be the Solid retention time considered?

A. 3-18 days
B. 1-2 days
C. 12 hours
D. 18 hours
Answer» C. 12 hours
186.

For the development of flocculent biomass for treating industrial water through Activated Sludge Process (ASP) what would be the Solid retention time considered?

A. 18 hours
B. 3-5 days
C. 20 hrs
D. 1-3 days
Answer» E.
187.

For the development of flocculent biomass for treating domestic water through Activated Sludge Process (ASP) what would be the Solid retention time considered?

A. 18 hours
B. 4 days
C. 10 hrs
D. 1-3 days
Answer» E.
188.

For the conversion of particulate organics through Activated Sludge Process (ASP) what would be the Solid retention time considered?

A. 18 hours
B. 1-2 days
C. 2-4 days
D. 5 days
Answer» D. 5 days
189.

For the removal of BOD through Activated Sludge Process (ASP) what would be the Solid retention time considered?

A. 18 hours
B. 1-2 days
C. 10 hrs
D. 3 days
Answer» C. 10 hrs
190.

Calculate the volume of the aeration tank required for the following data:Flow: 800 m3/dBOD: 1000 mg/LF/M ratio: 0.15(extended aeration)MLSS: 3500 mg/L

A. 1550 m3
B. 2550 m3
C. 3550 m3
D. 4550 m3
Answer» B. 2550 m3
191.

Which of the following encodes recombinase?

A. fliC
B. fljB
C. hin
D. fljA
Answer» D. fljA
192.

When DNA segment is in one orientation ____________

A. The gene for FljB and gene encoding FljA are expressed
B. The gene for FliC are expressed
C. The gene for FljB and gene encoding FljA are not expressed
D. The gene for FljB and gene encoding FljC are not expressed
Answer» B. The gene for FliC are expressed
193.

Whose interaction with Lex-A facilitates the repressor’s self-cleavage reaction?

A. Rec-A
B. Rec-B
C. Rec-C
D. Rec-D
Answer» B. Rec-B
194.

Formation of the attenuator stem-and-loop structure depends on the events that occur during translation of ____________

A. Regulatory sequence 1
B. Regulatory sequence 2
C. Regulatory sequence 3
D. Regulatory sequence 4
Answer» B. Regulatory sequence 2
195.

Attenuator sequences base-pair to form a stem-and-loop structure rich in ____________

A. A = T
B. G ≡ C
C. A = C
D. G = C
Answer» C. A = C
196.

Trp repressor is a ____________

A. Homodimer
B. Homotrimer
C. Heterodimer
D. Heterotrimer
Answer» B. Homotrimer
197.

CAP is ____________

A. Catabolite gene activator protein
B. Catabolite gene repressor protein
C. Anabolite gene activator protein
D. Anabolite gene repressor protein
Answer» B. Catabolite gene repressor protein
198.

Which property of the diaphragm return spring helps in the determination of the exact pressure range?

A. Tension
B. Stress
C. Starin
D. Stiffness
Answer» E.
199.

In which system the pump starts to operate immediately as the ignition is switched on?

A. A.C mechanical pump
B. S U electrical pump
C. A.C mechanical pump & S U electrical pump
D. Mechanical pump
Answer» C. A.C mechanical pump & S U electrical pump
200.

Which of the following has the requirement of placing the pump necessarily close to the engine ?

A. A.C mechanical pump
B. S U electrical pump
C. A.C mechanical pump & S U electrical pump
D. Electric pump
Answer» B. S U electrical pump