Physics ECAT Pre Engineering MCQ's Test For Full Book With Answers

Physics ECAT Pre Engineering MCQ's Test For Full Book

Sr. # Questions Answers Choice
1 A unit cell is smallest basic structure which is: One dimensional Two dimensional Three dimensional Four dimensional None of these
2 The arrangement or molecules or atoms in a crystalline solid can be studied by using: Chemical methods Neutrons X-ray techniques Copper atoms Both (A) and (B)
3 An ordinary glass gradually softens into a 'paste -like' state before it becomes a very viscous liquid. It happens almost at: 800<sup>o</sup>C 500<sup>o</sup>C 300<sup>o</sup>C 100<sup>o</sup>C None of these
4 In a cubic crystal, All solids meet at: 60<sup>o</sup> 90<sup>o</sup> 109<sup>o</sup> 30<sup>o</sup> 10<sup>o</sup>
5 The pattern of crystalline solid is: One dimesional Two dimensional Three dimensional None of these Either (A) or (B)
6 Amorphous solids: Have definite melting points Are called glassy solids Have no definite melting point Both (B) and (C) Both (A) and (C)
7 The word amorphous means: Without any structure With definite structure Regular arrangement of molecules Both (B) and (C) None of these
8 The force which maintain the strict long-range order between atoms of a crystalline solid is the: Nuclear force Cohesive force Adhesive force Coulomb force None of these
9 The transition from solid state to liquid state is: Abrupt Slow Continous Discontinous Both (A) and (D)
10 The transition from solid to liquid is actually from: Order to disorder Disorder to order Order to order Disorder to disorder None of these
11 Each atom in a metal crystal vibrates about a fixed point with an amplitude that: Decrease the rise in temprature Is not affected by rise in temprature Increase with rise in temprature Both (B) and (C) None of these
12 Zirconia is classified as: Ceramic solid Ionic compound Metal Either (A) or (B) Either (B) or (C)
13 The solids are classified as: Metals Crystalline Amorphous Polymeric All except (A)
14 Crystalline solids are in the form of: Metals Ionic Compounds Ceramics Both (A) and (B) All of these
15 The basic circuit element in D.C. circuit is: A capacitor A resistor An inductor Both (A) and (C) Both (A) and (B)
16 The basic circuit element in A.C. circuits are: Resistor and capacitor Resistor and Inductor Capacitor only Both (B) and (C) None of these
17 Unless stated otherwise, when we speak of A.C. meter reading, we usualy mean: Peak value RMS value Instantaneous value Peak-to-peak value Both (A) and (C0
18 The length of rotating vector (on a certain scale) represents the: Peak value of alternating quantity RMS value of alternating quantity Instantaneous value of alternating quantity Either (B) or (C) Either (A) or (B)
19 A sinusoidally alternating voltage or current can be graphically represented by a: Vector Rotating vector Clockwise vector Anticlockwise voltage vector None of these
20 If 250V is the RMS value of alternative voltage, then its peak value Vowill be: 353.5V 250V 175V zero 400V
21 If we connect a A.C. volt meter to read A.C. voltage, It would read its: RMS value Instantaneous value Valued average over a cycle Zero Both (B) and (C)
22 The phase at the positive peak of an A.C. cycle is: 0<span style="font-family: &quot;Times New Roman&quot;, serif; font-size: 12pt; text-align: justify;">º</span><p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;"><o:p></o:p></span></p><p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;"><o:p></o:p></span></p> 90<span style="font-family: &quot;Times New Roman&quot;, serif; font-size: 12pt; text-align: justify;">º</span><p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;"><o:p></o:p></span></p> 180<span style="font-family: &quot;Times New Roman&quot;, serif; font-size: 12pt; text-align: justify;">º</span><p class="MsoNormal" style="text-align:justify"><span style="font-size:12.0pt; line-height:107%;font-family:&quot;Times New Roman&quot;,&quot;serif&quot;"><o:p></o:p></span></p> 0 and<span style="font-size:12.0pt;line-height:107%; font-family:&quot;Plantagenet Cherokee&quot;,&quot;serif&quot;;mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin;mso-bidi-font-family:&quot;Times New Roman&quot;; mso-ansi-language:EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA">Ꮨ</span> <span style="font-size:12.0pt;line-height:107%; font-family:&quot;Plantagenet Cherokee&quot;,&quot;serif&quot;;mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin;mso-bidi-font-family:&quot;Times New Roman&quot;; mso-ansi-language:EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA">Ꮨ/2 and 3</span><span style="font-size:12.0pt;line-height:107%; font-family:&quot;Plantagenet Cherokee&quot;,&quot;serif&quot;;mso-fareast-font-family:Calibri; mso-fareast-theme-font:minor-latin;mso-bidi-font-family:&quot;Times New Roman&quot;; mso-ansi-language:EN-US;mso-fareast-language:EN-US;mso-bidi-language:AR-SA">Ꮨ/2</span>
23 The alternative voltage of current is actually measured by: Its RMS value Square root of its mean square value Instantaneous value Peak value Both (A) and (B)
24 The magnitude of alternative voltage V: Always increase Always decrease Remains constant Does not remain constant None of these
25 If we connected the ordinary DC ammeter to measure alternating current, it would measure its: Instantaneous value RMS value Value averaged over a cycle Either (B) or (C) Either (A) or (C)
26 The RMS value of alternating current is: 0.7 times at the peak value 0.5 times the peak value 0.7 times the Instantaneous value Equal to maximum voltage None of these
27 The Instantaneous value of alternative current maybe: The same as its RMS value Greater than its Rms value The same as its peak value Any of these None of these
28 Peak value of alternative current is:
 one of its Instantaneous value Equal to its RMS value The same as its peak-to-peak value Both (B) and (C) None of these
29 The sum of positive and negative peak values is called: Instantaneous value Peak value Rms valuie Peak-to peak-value None of these
30 The highest value reached by the voltage or current: In quarter cycle is called Instantaneous value In half cycle is called peak-to-peak value In one cycle is called peak value In half cycle is called Instantaneous value None of these
Download This Set

Is this page helpful?