Text over the header with figure

Question

I'm putting a figure in the header of my article, but the text is getting superimposed in the header only on the first page. I think that the problem is with the figure because when I remove it, the problem disappears.

I tried this answer but it did not help me with the problem

The code is above this line:

\documentclass[]{article}
\usepackage[utf8]{inputenc}
\usepackage[a4paper,margin=1in,headheight=.4in,headsep=12pt,heightrounded]{geometry}
\usepackage{graphicx}
\usepackage{lipsum}
\usepackage{subfig}% http://ctan.org/pkg/subfig
\usepackage{fancyhdr}

\pagestyle{fancy}
\fancyhf{}
\chead{\includegraphics[scale=.11]{cortada.jpg}\\
SERVIÇO PUBLICO FEDERAL\\
UNIVERSIDADE FEDERAL DE SERIGPE\\
PRO-REITORIA DE POS-GRADUACAO E PESQUISA}
\setlength{\headsep}{0.2cm}
\title{[RASCUNHO] Brincando com cabeçalhos}
\author{José Joaquim Andrade}
\date{November 2018}

\setlength{\parindent}{1.5cm}
\setlength{\parskip}{0.2cm}
\makeindex

\begin{document}

% \maketitle

\section{First Section}

\lipsum
\lipsum[3-16]

\newpage

\section{Second Section}
\lipsum
\section{Second Section}

\lipsum

\end{document}

To clarify my question, a print screen of the problem is presented below:

Answer 1

The headheight is too small. To increase it with \setlength{\headheight}{...}

The necessary size will depend on the image and can be found as a warning in the .log file of your document. For a dummy image I used I for example got

Package Fancyhdr Warning: \headheight is too small (28.90755pt): 
 Make it at least 66.0991pt.
 We now make it that large for the rest of the document.
 This may cause the page layout to be inconsistent, however.

so I rounded up and used \setlength{\headheight}{67pt}

\documentclass[]{article}
\usepackage[utf8]{inputenc}
\usepackage[a4paper,margin=1in,headheight=.4in,headsep=12pt,heightrounded]{geometry}
\usepackage{graphicx}
\usepackage{lipsum}
\usepackage{subfig}% http://ctan.org/pkg/subfig
\usepackage{fancyhdr}

\pagestyle{fancy}
\fancyhf{}
\chead{\includegraphics[scale=.11]{example-image}\\
SERVIÇO PUBLICO FEDERAL\\
UNIVERSIDADE FEDERAL DE SERIGPE\\
PRO-REITORIA DE POS-GRADUACAO E PESQUISA}
\setlength{\headsep}{0.2cm}
\title{[RASCUNHO] Brincando com cabeçalhos}
\author{José Joaquim Andrade}
\date{November 2018}

\setlength{\parindent}{1.5cm}
\setlength{\parskip}{0.2cm}
\makeindex

\setlength{\headheight}{67pt}

\begin{document}

% \maketitle

\section{First Section}

\lipsum
\lipsum[3-16]

\newpage

\section{Second Section}
\lipsum
\section{Second Section}

\lipsum

\end{document}